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Gated SPECT MPI phase analysis was performed using the software in the Emory Cardiac Toolbox and an SD &#8805;43&#176; was considered to indicate mechanical dyssynchrony&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Statistical analysis</span><p id="par0045" class="elsevierStylePara elsevierViewall">A descriptive analysis was performed considering&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8226;</span><p id="par0050" class="elsevierStylePara elsevierViewall">Clinical variables&#58; age&#44; gender&#44; diabetes&#44; hypertension&#44; known CAD &#40;previous myocardial infarction &#40;MI&#41; or percutaneous or surgical revascularization&#41;&#59;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8226;</span><p id="par0055" class="elsevierStylePara elsevierViewall">ECG variables&#58; QRS width&#44; QRS &#8805;120 ms&#44; bundle branch block pattern &#40;BBB&#41;&#59;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8226;</span><p id="par0060" class="elsevierStylePara elsevierViewall">SPECT MPI variables&#58; exercise vs&#46; pharmacological stress with adenosine&#44; presence of perfusion abnormalities&#44; SSS&#44; SRS&#44; SDS&#44; LVEF&#44; end-diastolic volume &#40;EDV&#41; and SD on phase analysis&#46; Patients were divided into those with SRS &#60;10&#37; and those with SRS &#8805;10&#37; of LV involvement&#46;</p></li></ul></p><p id="par0065" class="elsevierStylePara elsevierViewall">Continuous variables were presented as mean &#177; standard deviation and categorical variables were presented as proportions&#46; Continuous variables were compared using ANOVA or the nonparametric Mann&#8211;Whitney test when appropriate&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Fisher&#39;s exact test was used for categorical data&#46; Considering SD &#8805;43&#176; as the dependent variable&#44; univariate logistic regression analysis was used to assess predictors of mechanical dyssynchrony&#46; Significant predictors were then incorporated into multivariate models&#46; To assess the influence of rest perfusion abnormalities on mechanical dyssynchrony&#44; the previous analysis was performed in the patient group with normal or mildly abnormal rest perfusion images &#40;SRS &#60;10&#37; of LV involvement&#41;&#46; The level of statistical significance was taken to be 0&#46;05&#46; All statistical analyses were performed using StatView version 5&#46;0&#46;1 for Macintosh and Windows&#44; SAS Institute&#46;</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Results</span><p id="par0075" class="elsevierStylePara elsevierViewall">The study included 143 patients&#44; 22 women &#40;15&#46;4&#37;&#41; and 121 men &#40;84&#46;6&#37;&#41;&#44; with a mean age of 62&#46;8&#177;11&#46;7 years&#46; Clinical&#44; electrocardiographic and SPECT MPI characteristics are shown in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">The prevalence of known CAD in this group was 41&#46;3&#37; and among these patients there was also a significant prevalence of hypertension and diabetes&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">On baseline ECG a QRS width &#8805;120 ms was observed in 43&#46;7&#37; of the patients and a pattern of bundle branch block &#40;BBB&#41; in 16&#46;1&#37;&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Almost all the exams were performed using pharmacological vasodilatation with adenosine &#40;86&#37;&#41;&#46; A high number of abnormal perfusion images were seen &#40;76&#46;9&#37;&#41; and the prevalence of mechanical dyssynchrony was also high &#40;53&#46;1&#37;&#41;&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a> shows an example of a perfusion study with extensive defects and the related dyssynchrony analysis revealing mechanical dyssynchrony&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">In <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> clinical&#44; electrocardiographic and gated SPECT MPI characteristics are compared in patients with and without mechanical dyssynchrony according to SD&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">The main differences between patients with and without mechanical dyssynchrony were the presence of diabetes and gated SPECT MPI variables&#46; Patients with mechanical dyssynchrony had a higher prevalence of abnormal perfusion exams&#44; with larger fixed defects&#44; higher EDV and worse LVEF&#46; In spite of the differences observed in the prevalence of QRS &#8805;120 ms&#44; this was not statistically significant&#46; Twenty-two patients had LVEF &#8804;35&#37; and QRS &#8805;120 ms&#44; and 17 of these patients had mechanical dyssynchrony&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Using logistic regression analysis&#44; the univariate predictors of mechanical dyssynchrony were diabetes&#44; the presence of abnormal perfusion&#44; the extent of stress&#47;rest perfusion defects&#44; EDV and LVEF dysfunction&#46; The presence of LVEF &#8804;35&#37; and QRS &#8805;120 ms was also a predictor of mechanical dyssynchrony &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0110" class="elsevierStylePara elsevierViewall">Two multivariate models were built to identify variables that add incremental value over LVEF and QRS width&#44; functioning as independent predictors of dyssynchrony&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">In the clinical model &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#44; diabetes was an independent predictor of mechanical dyssynchrony&#46; The model incorporating MPI variables &#40;SRS and EDV&#41; added predictive value to the clinical one and in this model SRS and EDV were independent predictors of dyssynchrony &#40;<a class="elsevierStyleCrossRef" href="#tbl0025">Table 5</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><elsevierMultimedia ident="tbl0025"></elsevierMultimedia><p id="par0120" class="elsevierStylePara elsevierViewall">According to these results&#44; perfusion abnormalities&#44; particularly those present at rest&#44; were strong predictors of mechanical dyssynchrony&#46; To assess how the extent of SRS affects mechanical dyssynchrony&#44; the same analysis was performed in the patient group with normal or mildly abnormal rest images&#44; excluding those with SRS corresponding to LV involvement &#8805;10&#37;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">In these patients QRS width&#44; and in particular QRS &#8805;120 ms&#44; were significantly more prevalent in patients with SD &#8805;43&#176;&#44; and as expected QRS &#8805;120 ms was the only predictor of mechanical dyssynchrony in this group &#40;<a class="elsevierStyleCrossRefs" href="#tbl0030">Tables 6 and 7</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0030"></elsevierMultimedia><elsevierMultimedia ident="tbl0035"></elsevierMultimedia></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Discussion</span><p id="par0130" class="elsevierStylePara elsevierViewall">This is a study of consecutive patients referred for gated SPECT MPI with impaired LVEF &#40;&#8804;50&#37;&#41;&#46; Our aim was to evaluate not only the prevalence of mechanical dyssynchrony in these patients but also its predictors among clinical&#44; electrocardiographic and gated SPECT MPI variables&#46; Mechanical dyssynchrony was defined&#44; in accordance with previous studies&#44; as a standard deviation&#44; in phase analysis&#44; of &#8805;43&#176;&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">The mean age of this group was 63 years&#44; approximately 41&#37; of the patients had a history of CAD &#40;MI and&#47;or myocardial revascularization&#41; and there was also a significant prevalence of hypertension &#40;62&#37;&#41; and diabetes &#40;43&#37;&#41;&#46; Most of the patients thus had an intermediate to high risk of CAD&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">In view of these findings&#44; the high frequency of perfusion abnormalities found on gated SPECT MPI &#40;77&#37;&#41; was not surprising&#46; LVEF was &#8804;35&#37; in 30&#46;1&#37; of the studied patients&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">The precise prevalence of mechanical dyssynchrony in patients with impaired LVEF is still debated&#59; although phase SD is a continuous variable it is used to dichotomize populations into normal vs&#46; dyssynchronous using a cut-off value derived from data from a single center&#44; with the inherent limitations&#46; Even so&#44; we used this value &#40;43&#176;&#41; in our study&#44; and a prevalence of 53&#37; was found for mechanical dyssynchrony based on gated SPECT&#46;<a class="elsevierStyleCrossRefs" href="#bib0085"><span class="elsevierStyleSup">17&#44;18</span></a></p><p id="par0150" class="elsevierStylePara elsevierViewall">The main differences between patients with and without mechanical dyssynchrony were the presence of diabetes and of an abnormal perfusion pattern &#40;both higher in patients with mechanical dyssynchrony&#41;&#44; LVEF &#40;lower in patients with dyssynchrony&#41;&#44; perfusion scores &#40;with higher stress and rest scores and lower difference score in dyssynchrony patients&#41; and EDV &#40;higher in patients with mechanical dyssynchrony&#41;&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">A wide QRS &#40;&#8805;120 ms&#41; was more prevalent &#40;although without statistical significance&#41; in the dyssynchrony group &#40;50&#37;&#41;&#44; but it should also be noted that among these patients&#44; 50&#37; had a narrow QRS&#46; QRS duration was slightly greater in patients with dyssynchrony&#44; but again without statistical significance&#46; Several published studies have also found mechanical dyssynchrony in a considerable number of patients with a narrow QRS&#46; The presence of ischemia and MI could be related to these findings&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a> Whether these patients &#40;with mechanical and without electrical dyssynchrony&#41; benefit from CRT is still a matter of debate&#46;<a class="elsevierStyleCrossRefs" href="#bib0100"><span class="elsevierStyleSup">20&#44;21</span></a> Beshai et al&#46; found no significant improvements with CRT in patients with narrow QRS&#46;<a class="elsevierStyleCrossRefs" href="#bib0110"><span class="elsevierStyleSup">22&#44;23</span></a></p><p id="par0160" class="elsevierStylePara elsevierViewall">According to our results&#44; there is a significant difference in LVEF &#40;lower in patients with dyssynchrony&#41; between the established groups&#46; Dyssynchrony was identified in 72&#46;1&#37; of patients with LVEF &#8804;35&#37; but also in 45&#46;0&#37; of those with LVEF between 35 and 50&#37;&#46; Similar findings have been described in previous studies&#46;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a> Atchey et al&#46; found that 37&#37; of patients with mild to moderate LVEF &#40;35&#8211;50&#37;&#41; had significant degrees of mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The number of patients with LVEF and QRS criteria for CRT was also higher in the dyssynchrony group&#46; Five of these patients &#40;22&#46;7&#37;&#41; did not demonstrate mechanical dyssynchrony&#46; This result raises the issue of electrical without mechanical dyssynchrony&#59; the existing evidence emphasizes the role of imaging techniques in the identification of the latter&#44; and in the selection of patients who may benefit from CRT&#46; It appears that CRT can correct mechanical dyssynchrony caused by electrical dyssynchrony&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">26&#8211;29</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">In univariate and multivariate logistic regression analysis&#44; we found that in these patients the predictors of dyssynchrony were the presence of diabetes&#44; the presence and extent of perfusion defects&#44; especially rest score&#44; EDV and LVEF&#46; The simultaneous presence of wide QRS and low LVEF was also a predictor of mechanical dyssynchrony&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Diabetes is a powerful predictor of ischemic heart disease&#44; so it was expected to find this relationship with mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRefs" href="#bib0150"><span class="elsevierStyleSup">30&#44;31</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Low LVEF and increased EDV are predictors of dyssynchrony&#46; Low EF and an enlarged LV are accompanied by geometrical and morphological modifications and by conduction disturbances and changes in contraction patterns&#46; These changes can potentially be reversed by CRT&#46;<a class="elsevierStyleCrossRefs" href="#bib0160"><span class="elsevierStyleSup">32&#8211;34</span></a></p><p id="par0185" class="elsevierStylePara elsevierViewall">We also found that the extent of perfusion defects&#44; particularly of rest perfusion abnormalities&#44; was also associated with increased dyssynchrony&#46; This is not surprising considering that ischemic and infarcted segments exhibit significant degrees of motility changes &#40;hypokinesia&#44; akinesia or dyskinesia&#41;&#44; resulting in abnormal contraction and dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">35</span></a></p><p id="par0190" class="elsevierStylePara elsevierViewall">Considering the presence of CRT criteria &#40;QRS &#8805;120 ms and LVEF &#8804;35&#37;&#41;&#44; two models were built to identify independent predictors of mechanical dyssynchrony and the incremental values of adding these predictors to the conventional CRT criteria&#46; In the model incorporating clinical and gated SPECT MPI variables&#44; SRS and EDV were independent predictors of dyssynchrony and the incremental value of adding them to the CRT criteria was well demonstrated&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">A study by Samad et al&#46; had similar results but their study population had LVEF &#8804;35&#37;&#46; In these they found that QRS width was also an important predictor of mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">36</span></a></p><p id="par0200" class="elsevierStylePara elsevierViewall">In the study by Atchey et al&#46; there was a weak correlation between QRS width and dyssynchrony in patients with LVEF between 35 and 50&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a> In our study&#44; only 30&#46;1&#37; of patients had LVEF &#8804;35&#37;&#44; which could partly explain the lack of predictive value of QRS width in our population&#46; It should also be borne in mind that these patients had a very high prevalence of perfusion abnormalities and known CAD&#44; both of which lead to mechanical dyssynchrony&#46; For this reason we also evaluated patients with a rest perfusion score under 10&#37; of LV involvement&#46; In these patients there was a clear relation between QRS width and the occurrence of mechanical dyssynchrony&#59; in fact&#44; QRS &#8805;120 ms was the only predictor of dyssynchrony&#46; Rest perfusion abnormalities are associated with scar tissue&#44; mechanical dyssynchrony and poor CRT response&#46;<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">37&#8211;40</span></a></p><p id="par0205" class="elsevierStylePara elsevierViewall">Mechanical dyssynchrony has been evaluated by several methods in several contexts&#44; and appears to be common not only in patients with impaired LVEF and wide QRS&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a> According to the literature&#44; mechanical dyssynchrony has additional value over QRS duration in predicting cardiac events in heart failure patients&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">41</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Limitations</span><p id="par0210" class="elsevierStylePara elsevierViewall">This was an observational single-center cohort study with the limitations inherent to this kind of analysis&#46; As symptoms of heart failure and functional class were not assessed&#44; dyssynchrony could not be related to them&#44; and this is an important constraint on further conclusions&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Conclusions</span><p id="par0215" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8226;</span><p id="par0220" class="elsevierStylePara elsevierViewall">Far from questioning previous results and recommendations&#44; this study corroborates the idea that mechanical dyssynchrony&#44; according to established criteria&#44; is highly prevalent in a population with impaired ventricular function and with a high prevalence of perfusion abnormalities&#46;</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">&#8226;</span><p id="par0225" class="elsevierStylePara elsevierViewall">Mechanical dyssynchrony is very common in patients with normal QRS width and mildly abnormal LVEF&#46;</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">&#8226;</span><p id="par0230" class="elsevierStylePara elsevierViewall">It was also found that clinical and MPI variables add value to the CRT criteria for predicting mechanical dyssynchrony&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">&#8226;</span><p id="par0235" class="elsevierStylePara elsevierViewall">In patients with normal or mildly abnormal rest images&#44; QRS width was the only predictor of mechanical dyssynchrony&#46;</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">&#8226;</span><p id="par0240" class="elsevierStylePara elsevierViewall">In this context&#44; gated SPECT myocardial perfusion imaging&#44; which provides information on ischemia&#44; fibrosis&#44; ventricular function and dyssynchrony&#44; is a valuable aid to therapeutic decision-making&#44; including the use of cardiac resynchronization therapy&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Ethical disclosures</span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Protection of human and animal subjects</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that no experiments were performed on humans or animals for this study&#46;</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Confidentiality of data</span><p id="par0250" class="elsevierStylePara elsevierViewall">The authors declare that they have followed the protocols of their work center on the publication of patient data and that all the patients included in the study received sufficient information and gave their written informed consent to participate in the study&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Right to privacy and informed consent</span><p id="par0255" class="elsevierStylePara elsevierViewall">The authors declare that no patient data appear in this article&#46;</p></span></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Conflicts of interest</span><p id="par0260" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare&#46;</p></span></span>"
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Gated SPECT myocardial perfusion imaging &#40;MPI&#41; has been used to quantify mechanical dyssynchrony&#46; Mechanical dyssynchrony appears to be related to response to cardiac resynchronization therapy&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Objective</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To evaluate the presence and predictors of mechanical dyssynchrony in patients with impaired left ventricular function &#40;LVEF&#41; &#8804;50&#37;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The study included 143 consecutive patients referred for gated SPECT MPI with LVEF &#8804;50&#37;&#46; Gated SPECT MPI was performed according to a stress&#47;rest protocol acquiring images with Tc 99m-tetrofosmin&#46; Emory Cardiac Toolbox software was used for phase analysis and a standard deviation &#40;SD&#41; &#8805;43&#176; was considered to indicate mechanical dyssynchrony&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Mechanical dyssynchrony was present in 53&#46;1&#37; of the patients&#46; Its predictors were diabetes &#40;OR 2&#46;0&#44; p&#8804;0&#46;05&#41;&#44; summed stress score &#40;OR 1&#46;1&#44; p&#8804;0&#46;0005&#41;&#44; summed rest score &#40;OR 1&#46;1&#44; p&#8804;0&#46;0001&#41;&#44; end-diastolic volume &#40;OR 1&#46;0&#44; p&#8804;0&#46;0001&#41;&#44; LVEF &#40;OR 0&#46;9&#44; p&#8804;0&#46;0001&#41;&#44; LVEF &#8804;35&#37; &#40;OR 3&#46;1&#44; p&#8804;0&#46;005&#41; and LVEF &#8804;35&#37; and QRS &#8805;120 ms &#40;OR 3&#46;5&#44; p&#8804;0&#46;05&#41;&#46; In this study QRS width and QRS &#8805;120 ms were not predictors of mechanical dyssynchrony&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Myocardial perfusion imaging can be used to assess mechanical dyssynchrony&#46; In patients with impaired ventricular function mechanical dyssynchrony was highly prevalent and was related to parameters of left ventricular function and perfusion&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0040">Introdu&#231;&#227;o</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">A avalia&#231;&#227;o de dessincronia ventricular mec&#226;nica atrav&#233;s da an&#225;lise do histograma de fase na cintigrafia de perfus&#227;o mioc&#225;rdica tem sido descrita na literatura&#46; Segundo a evid&#234;ncia atual&#44; a presen&#231;a de dessincronia mec&#226;nica encontra-se relacionada com a resposta &#224; terap&#234;utica de ressincroniza&#231;&#227;o&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0045">Objectivos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Avaliar a presen&#231;a e os preditores de dessincronia ventricular mec&#226;nica em pacientes com fra&#231;&#227;o de eje&#231;&#227;o ventricular esquerda &#40;FEVE&#41; &#8804; 50&#37;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0050">M&#233;todos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Foram inclu&#237;dos pacientes que realizaram cintigrafia de perfus&#227;o mioc&#225;rdica e cuja FEVE foi inferior ou igual a 50&#37;&#46; A amostra estudada incluiu 143 pacientes&#46; As imagens de perfus&#227;o foram adquiridas de acordo com o protocolo esfor&#231;o seguido de repouso com Tc-99m Tetrafosmina&#46; A avalia&#231;&#227;o de dessincronia baseou-se na determina&#231;&#227;o do desvio padr&#227;o obtido atrav&#233;s da an&#225;lise do histograma de fase &#40;<span class="elsevierStyleItalic">Emory Toolbox Software</span>&#41;&#46; A presen&#231;a de dessincronia foi considerada quando o desvio-padr&#227;o no histograma de fase foi superior ou igual a 43&#176;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">A presen&#231;a de dessincronia foi observada 53&#44;1&#37; dos doentes&#46; Foram preditores de dessincronia&#44; a diabetes &#40;OR 2&#44;0&#44; p &#8804; 0&#44;05&#41;&#44; o <span class="elsevierStyleItalic">score</span> de esfor&#231;o &#40;OR 1&#44;1&#44; p &#8804; 0&#44;0005&#41;&#44; o <span class="elsevierStyleItalic">score</span> de repouso &#40;OR 1&#44;1&#44; p &#8804; 0&#44;0001&#41;&#44; o volume telediast&#243;lico &#40;OR 1&#44;0&#44; p &#8804; 0&#44;0001&#41;&#44; a FEVE &#40;OR 0&#44;9&#44; p &#8804; 0&#44;0001&#41;&#44; FEVE &#8804; 35&#37; &#40;OR 3&#44;1&#44; p &#8804; 0&#44;005&#41; e a presen&#231;a em simult&#226;neo de FEVE &#8804; 35&#37; e QRS &#8805;120 ms &#40;OR 3&#44;5&#44; p &#8804; 0&#44;05&#41;&#46; Nesta avalia&#231;&#227;o a dura&#231;&#227;o do QRS ou a presen&#231;a de QRS &#8805; 120 ms n&#227;o se relacionaram com a presen&#231;a de dessincronia&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0060">Conclus&#245;es</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">A cintigrafia de perfus&#227;o mioc&#225;rdica pode ser usada na avalia&#231;&#227;o de dessincronia e esta tem uma elevada preval&#234;ncia em pacientes com FEVE diminu&#237;da relacionando-se com par&#226;metros de fun&#231;&#227;o ventricular e perfus&#227;o mioc&#225;rdica&#46;</p>"
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                  \t\t\t\t">61 &#40;42&#46;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">59 &#40;41&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">62&#37; &#40;43&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">12&#46;6&#177;10&#46;1&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">139&#46;8&#177;59&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">38&#46;8&#177;8&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">43&#37; &#40;30&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">46&#46;1&#177;20&#46;3&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">22&#37; &#40;15&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">n&#61;143&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#8805;43&#176;76 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Male&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">57 &#40;85&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">64 &#40;84&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">62&#46;9&#177;12&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">62&#46;7&#177;11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">23 &#40;34&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38 &#40;50&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">41 &#40;61&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">47 &#40;61&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Known CAD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22 &#40;32&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37 &#40;48&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS &#40;0&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS width&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">111&#46;9&#177;33&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120&#46;1&#177;31&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">24 &#40;35&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38 &#40;50&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">BBB&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;11&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;19&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Exercise&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;16&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;11&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">46 &#40;68&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">64 &#40;84&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#46;4&#177;8&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15&#46;5&#177;10&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&#46;8&#177;6&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&#46;7&#177;11&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SDS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;8&#177;4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;5&#177;4&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">118&#46;2&#177;48&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">158&#46;6&#177;62&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12 &#40;17&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">31&#40;40&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">41&#46;5&#177;6&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">36&#46;4&#177;9&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5 &#40;7&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17 &#40;22&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354974.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Differences between patients with and without mechanical dyssynchrony&#46;</p>"
        ]
      ]
      3 => array:7 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">CI&#58; confidence interval&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;3&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;1&#8211;5&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&#8211;1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;4&#8211;6&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;3&#8211;10&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
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                0 => "xTab354969.png"
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        ]
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          "en" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">Univariate predictors of mechanical dyssynchrony&#46;</p>"
        ]
      ]
      4 => array:7 [
        "identificador" => "tbl0020"
        "etiqueta" => "Table 4"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0095" class="elsevierStyleSimplePara elsevierViewall">Chi-square &#61;11&#46;6&#59; p&#8804;0&#46;005 &#40;likelihood ratio&#41;&#46; CI&#58; confidence interval&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;4&#8211;12&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;4&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
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            ]
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        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">Clinical model&#46;</p>"
        ]
      ]
      5 => array:7 [
        "identificador" => "tbl0025"
        "etiqueta" => "Table 5"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">Chi-square &#61;28&#46;5&#59; p&#8804;0&#46;0001 &#40;likelihood ratio&#41;&#46; CI&#58; confidence interval&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#59; SRS&#58; summed rest score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;8&#8211;8&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&#8211;4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354970.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">Clinical and MPI model&#46;</p>"
        ]
      ]
      6 => array:7 [
        "identificador" => "tbl0030"
        "etiqueta" => "Table 6"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0115" class="elsevierStyleSimplePara elsevierViewall">CAD&#58; coronary artery disease&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; SD&#58; standard deviation&#59; SDS&#58; summed difference&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">n&#61;71&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#60;43&#176;n&#61;40 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#8805;43&#176;n&#61;31 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">33 &#40;82&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">61&#46;5&#177;11&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">16 &#40;51&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">27 &#40;67&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21 &#40;67&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Known CAD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;20&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;35&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS width&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">107&#46;9&#177;29&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">123&#46;3&#177;34&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">10 &#40;25&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16 &#40;51&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 &#40;50&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;61&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">4&#46;1&#177;5&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">5&#46;9&#177;5&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">1&#46;2&#177;1&#46;8&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1&#46;7&#177;1&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SDS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">3&#46;0&#177;3&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">4&#46;2&#177;5&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">114&#46;5&#177;49&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">137&#46;4&#177;507&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS &#40;0&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">6 &#40;15&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;25&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">42&#46;2&#177;6&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">40&#46;5&#177;8&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
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Original article
Left ventricular mechanical dyssynchrony in patients with impaired left ventricular function undergoing gated SPECT myocardial perfusion imaging
Dessincronia ventricular mecânica em pacientes com função ventricular esquerda diminuída referenciados para cintigrafia de perfusão miocárdica (gated SPECT)
Maria João Vidigal Ferreiraa,
Autor para correspondência
mjvidigal@netc.pt

Corresponding author.
, Rodolfo Silvab, Nuno Cabanelasc, Maria João Cunhab, Domingos Ramosc, Anabela Albuquerqueb, Rogério Teixeirac, Ana Paula Moreirab, Gracinda Costab, João Limab, Luís Augusto Providênciac
a Faculdade de Medicina, Universidade de Coimbra, Centro Hospitalar e Universitário de Coimbra (HUC), Serviço de Cardiologia, Coimbra, Portugal
b Centro Hospitalar e Universitário de Coimbra (HUC), Serviço de Medicina Nuclear, Coimbra, Portugal
c Centro Hospitalar e Universitário de Coimbra (HUC), Serviço de Cardiologia, Coimbra, Portugal
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          "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Gated SPECT myocardial perfusion images &#40;A&#41; of a patient with an extensive fixed perfusion defect &#40;fibrosis&#41; and corresponding dyssynchrony analysis showing the polar map and phase histogram with a wide base and SD of 54&#46;6&#176; &#40;B&#41;&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Heart failure &#40;HF&#41; is highly prevalent and represents a considerable social and economic burden&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Cardiac resynchronization therapy &#40;CRT&#41; shows benefits in patients with end-stage HF&#44; leading to improvements in left ventricular &#40;LV&#41; end-diastolic diameter and LV ejection fraction &#40;LVEF&#41; after 6 months of follow-up in randomized trials&#46; CRT also has a beneficial impact on mortality&#44; functional class and quality of life in all HF patients&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#8211;4</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">The current guidelines recommend CRT &#40;class I&#44; level of evidence A&#41; in patients in NYHA class III or IV on optimal medical therapy&#44; LVEF &#8804;35&#37; and QRS duration &#8805;120 ms&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">In spite of the evidence in favor of CRT&#44; 20&#8211;40&#37; of HF patients do not respond to the procedure&#46; It has been suggested that one reason could be the criterion used to define dyssynchrony&#44; the QRS width&#44; which is not necessarily related to mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">6&#44;7</span></a> Observational studies have shown that the presence of left ventricular mechanical dyssynchrony is associated with a favorable response to CRT with LV reverse remodeling&#44; decreased mitral regurgitation and consequent improvement in clinical outcome&#46; By contrast&#44; the absence of significant mechanical dyssynchrony appears to be associated with a high rate of non-response to CRT&#46;<a class="elsevierStyleCrossRefs" href="#bib0040"><span class="elsevierStyleSup">8&#8211;11</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">The use of phase analysis of gated single-photon emission computed tomography &#40;SPECT&#41; myocardial perfusion imaging &#40;MPI&#41; for the evaluation of mechanical dyssynchrony has been described in previous studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0060"><span class="elsevierStyleSup">12&#8211;15</span></a> Standard gated SPECT short-axis imaging enables detection of three-dimensional regional maximal counts for each time frame&#46; The variation in regional maximal counts is proportional to regional wall thickening through the cardiac cycle&#46; Information on mechanical contraction of all regions &#40;phase distribution&#41; of the LV is obtained and displayed as either a histogram or a polar map&#46; In a normal LV&#44; regional contraction starts almost at the same time&#44; resulting in a uniform polar map and a narrow and peaked phase histogram&#46; The standard deviation of the left ventricular phases &#40;phase SD&#41; is a quantitative parameter that describes the dispersion of LV regional contraction and is used to assess mechanical dyssynchrony&#46; Significant dyssynchrony is defined&#44; according to previous studies&#44; as a phase SD &#8805;43&#176;&#46;<a class="elsevierStyleCrossRefs" href="#bib0060"><span class="elsevierStyleSup">12&#44;14&#8211;16</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">The aim of this study was to assess the prevalence and predictors of mechanical dyssynchrony in patients with impaired ventricular function&#46; As a secondary objective we set out to evaluate the predictors of mechanical dyssynchrony in patients with normal or mildly abnormal rest perfusion images&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Study population</span><p id="par0035" class="elsevierStylePara elsevierViewall">From February 1 to December 31 2011&#44; consecutive patients referred for routine gated SPECT MPI in the Nuclear Medicine Department of Coimbra University Medical Center with estimated LVEF &#8804;50&#37; were retrospectively included&#46; Patients with atrial fibrillation or in pacemaker rhythm were excluded&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">SPECT myocardial perfusion imaging</span><p id="par0040" class="elsevierStylePara elsevierViewall">Gated SPECT MPI data were acquired according to a stress &#40;exercise or pharmacological&#41;&#47;rest protocol using Tc-99m tetrofosmin and a dual-head &#40;Ventri&#8482;&#41; gamma camera&#46; Perfusion defects were assessed visually and quantified using a 17-segment scoring system&#46; The summed stress perfusion score &#40;SSS&#41;&#44; summed rest perfusion score &#40;SRS&#41; and summed difference score &#40;SDS&#41; were obtained&#46; Patients were divided into two groups according to SRS and percentage of LV involvement&#58; group 1 with &#60;10&#37; &#40;normal or mildly abnormal images&#41; and group 2 with &#8805;10&#37; LV involvement &#40;moderately to severely abnormal images&#41;&#46; Gated SPECT MPI phase analysis was performed using the software in the Emory Cardiac Toolbox and an SD &#8805;43&#176; was considered to indicate mechanical dyssynchrony&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Statistical analysis</span><p id="par0045" class="elsevierStylePara elsevierViewall">A descriptive analysis was performed considering&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8226;</span><p id="par0050" class="elsevierStylePara elsevierViewall">Clinical variables&#58; age&#44; gender&#44; diabetes&#44; hypertension&#44; known CAD &#40;previous myocardial infarction &#40;MI&#41; or percutaneous or surgical revascularization&#41;&#59;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8226;</span><p id="par0055" class="elsevierStylePara elsevierViewall">ECG variables&#58; QRS width&#44; QRS &#8805;120 ms&#44; bundle branch block pattern &#40;BBB&#41;&#59;</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8226;</span><p id="par0060" class="elsevierStylePara elsevierViewall">SPECT MPI variables&#58; exercise vs&#46; pharmacological stress with adenosine&#44; presence of perfusion abnormalities&#44; SSS&#44; SRS&#44; SDS&#44; LVEF&#44; end-diastolic volume &#40;EDV&#41; and SD on phase analysis&#46; Patients were divided into those with SRS &#60;10&#37; and those with SRS &#8805;10&#37; of LV involvement&#46;</p></li></ul></p><p id="par0065" class="elsevierStylePara elsevierViewall">Continuous variables were presented as mean &#177; standard deviation and categorical variables were presented as proportions&#46; Continuous variables were compared using ANOVA or the nonparametric Mann&#8211;Whitney test when appropriate&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">Fisher&#39;s exact test was used for categorical data&#46; Considering SD &#8805;43&#176; as the dependent variable&#44; univariate logistic regression analysis was used to assess predictors of mechanical dyssynchrony&#46; Significant predictors were then incorporated into multivariate models&#46; To assess the influence of rest perfusion abnormalities on mechanical dyssynchrony&#44; the previous analysis was performed in the patient group with normal or mildly abnormal rest perfusion images &#40;SRS &#60;10&#37; of LV involvement&#41;&#46; The level of statistical significance was taken to be 0&#46;05&#46; All statistical analyses were performed using StatView version 5&#46;0&#46;1 for Macintosh and Windows&#44; SAS Institute&#46;</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Results</span><p id="par0075" class="elsevierStylePara elsevierViewall">The study included 143 patients&#44; 22 women &#40;15&#46;4&#37;&#41; and 121 men &#40;84&#46;6&#37;&#41;&#44; with a mean age of 62&#46;8&#177;11&#46;7 years&#46; Clinical&#44; electrocardiographic and SPECT MPI characteristics are shown in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">The prevalence of known CAD in this group was 41&#46;3&#37; and among these patients there was also a significant prevalence of hypertension and diabetes&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">On baseline ECG a QRS width &#8805;120 ms was observed in 43&#46;7&#37; of the patients and a pattern of bundle branch block &#40;BBB&#41; in 16&#46;1&#37;&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Almost all the exams were performed using pharmacological vasodilatation with adenosine &#40;86&#37;&#41;&#46; A high number of abnormal perfusion images were seen &#40;76&#46;9&#37;&#41; and the prevalence of mechanical dyssynchrony was also high &#40;53&#46;1&#37;&#41;&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a> shows an example of a perfusion study with extensive defects and the related dyssynchrony analysis revealing mechanical dyssynchrony&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">In <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> clinical&#44; electrocardiographic and gated SPECT MPI characteristics are compared in patients with and without mechanical dyssynchrony according to SD&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">The main differences between patients with and without mechanical dyssynchrony were the presence of diabetes and gated SPECT MPI variables&#46; Patients with mechanical dyssynchrony had a higher prevalence of abnormal perfusion exams&#44; with larger fixed defects&#44; higher EDV and worse LVEF&#46; In spite of the differences observed in the prevalence of QRS &#8805;120 ms&#44; this was not statistically significant&#46; Twenty-two patients had LVEF &#8804;35&#37; and QRS &#8805;120 ms&#44; and 17 of these patients had mechanical dyssynchrony&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Using logistic regression analysis&#44; the univariate predictors of mechanical dyssynchrony were diabetes&#44; the presence of abnormal perfusion&#44; the extent of stress&#47;rest perfusion defects&#44; EDV and LVEF dysfunction&#46; The presence of LVEF &#8804;35&#37; and QRS &#8805;120 ms was also a predictor of mechanical dyssynchrony &#40;<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia><p id="par0110" class="elsevierStylePara elsevierViewall">Two multivariate models were built to identify variables that add incremental value over LVEF and QRS width&#44; functioning as independent predictors of dyssynchrony&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">In the clinical model &#40;<a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#41;&#44; diabetes was an independent predictor of mechanical dyssynchrony&#46; The model incorporating MPI variables &#40;SRS and EDV&#41; added predictive value to the clinical one and in this model SRS and EDV were independent predictors of dyssynchrony &#40;<a class="elsevierStyleCrossRef" href="#tbl0025">Table 5</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia><elsevierMultimedia ident="tbl0025"></elsevierMultimedia><p id="par0120" class="elsevierStylePara elsevierViewall">According to these results&#44; perfusion abnormalities&#44; particularly those present at rest&#44; were strong predictors of mechanical dyssynchrony&#46; To assess how the extent of SRS affects mechanical dyssynchrony&#44; the same analysis was performed in the patient group with normal or mildly abnormal rest images&#44; excluding those with SRS corresponding to LV involvement &#8805;10&#37;&#46;</p><p id="par0125" class="elsevierStylePara elsevierViewall">In these patients QRS width&#44; and in particular QRS &#8805;120 ms&#44; were significantly more prevalent in patients with SD &#8805;43&#176;&#44; and as expected QRS &#8805;120 ms was the only predictor of mechanical dyssynchrony in this group &#40;<a class="elsevierStyleCrossRefs" href="#tbl0030">Tables 6 and 7</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0030"></elsevierMultimedia><elsevierMultimedia ident="tbl0035"></elsevierMultimedia></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Discussion</span><p id="par0130" class="elsevierStylePara elsevierViewall">This is a study of consecutive patients referred for gated SPECT MPI with impaired LVEF &#40;&#8804;50&#37;&#41;&#46; Our aim was to evaluate not only the prevalence of mechanical dyssynchrony in these patients but also its predictors among clinical&#44; electrocardiographic and gated SPECT MPI variables&#46; Mechanical dyssynchrony was defined&#44; in accordance with previous studies&#44; as a standard deviation&#44; in phase analysis&#44; of &#8805;43&#176;&#46;</p><p id="par0135" class="elsevierStylePara elsevierViewall">The mean age of this group was 63 years&#44; approximately 41&#37; of the patients had a history of CAD &#40;MI and&#47;or myocardial revascularization&#41; and there was also a significant prevalence of hypertension &#40;62&#37;&#41; and diabetes &#40;43&#37;&#41;&#46; Most of the patients thus had an intermediate to high risk of CAD&#46;</p><p id="par0140" class="elsevierStylePara elsevierViewall">In view of these findings&#44; the high frequency of perfusion abnormalities found on gated SPECT MPI &#40;77&#37;&#41; was not surprising&#46; LVEF was &#8804;35&#37; in 30&#46;1&#37; of the studied patients&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">The precise prevalence of mechanical dyssynchrony in patients with impaired LVEF is still debated&#59; although phase SD is a continuous variable it is used to dichotomize populations into normal vs&#46; dyssynchronous using a cut-off value derived from data from a single center&#44; with the inherent limitations&#46; Even so&#44; we used this value &#40;43&#176;&#41; in our study&#44; and a prevalence of 53&#37; was found for mechanical dyssynchrony based on gated SPECT&#46;<a class="elsevierStyleCrossRefs" href="#bib0085"><span class="elsevierStyleSup">17&#44;18</span></a></p><p id="par0150" class="elsevierStylePara elsevierViewall">The main differences between patients with and without mechanical dyssynchrony were the presence of diabetes and of an abnormal perfusion pattern &#40;both higher in patients with mechanical dyssynchrony&#41;&#44; LVEF &#40;lower in patients with dyssynchrony&#41;&#44; perfusion scores &#40;with higher stress and rest scores and lower difference score in dyssynchrony patients&#41; and EDV &#40;higher in patients with mechanical dyssynchrony&#41;&#46;</p><p id="par0155" class="elsevierStylePara elsevierViewall">A wide QRS &#40;&#8805;120 ms&#41; was more prevalent &#40;although without statistical significance&#41; in the dyssynchrony group &#40;50&#37;&#41;&#44; but it should also be noted that among these patients&#44; 50&#37; had a narrow QRS&#46; QRS duration was slightly greater in patients with dyssynchrony&#44; but again without statistical significance&#46; Several published studies have also found mechanical dyssynchrony in a considerable number of patients with a narrow QRS&#46; The presence of ischemia and MI could be related to these findings&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a> Whether these patients &#40;with mechanical and without electrical dyssynchrony&#41; benefit from CRT is still a matter of debate&#46;<a class="elsevierStyleCrossRefs" href="#bib0100"><span class="elsevierStyleSup">20&#44;21</span></a> Beshai et al&#46; found no significant improvements with CRT in patients with narrow QRS&#46;<a class="elsevierStyleCrossRefs" href="#bib0110"><span class="elsevierStyleSup">22&#44;23</span></a></p><p id="par0160" class="elsevierStylePara elsevierViewall">According to our results&#44; there is a significant difference in LVEF &#40;lower in patients with dyssynchrony&#41; between the established groups&#46; Dyssynchrony was identified in 72&#46;1&#37; of patients with LVEF &#8804;35&#37; but also in 45&#46;0&#37; of those with LVEF between 35 and 50&#37;&#46; Similar findings have been described in previous studies&#46;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a> Atchey et al&#46; found that 37&#37; of patients with mild to moderate LVEF &#40;35&#8211;50&#37;&#41; had significant degrees of mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The number of patients with LVEF and QRS criteria for CRT was also higher in the dyssynchrony group&#46; Five of these patients &#40;22&#46;7&#37;&#41; did not demonstrate mechanical dyssynchrony&#46; This result raises the issue of electrical without mechanical dyssynchrony&#59; the existing evidence emphasizes the role of imaging techniques in the identification of the latter&#44; and in the selection of patients who may benefit from CRT&#46; It appears that CRT can correct mechanical dyssynchrony caused by electrical dyssynchrony&#46;<a class="elsevierStyleCrossRefs" href="#bib0130"><span class="elsevierStyleSup">26&#8211;29</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">In univariate and multivariate logistic regression analysis&#44; we found that in these patients the predictors of dyssynchrony were the presence of diabetes&#44; the presence and extent of perfusion defects&#44; especially rest score&#44; EDV and LVEF&#46; The simultaneous presence of wide QRS and low LVEF was also a predictor of mechanical dyssynchrony&#46;</p><p id="par0175" class="elsevierStylePara elsevierViewall">Diabetes is a powerful predictor of ischemic heart disease&#44; so it was expected to find this relationship with mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRefs" href="#bib0150"><span class="elsevierStyleSup">30&#44;31</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Low LVEF and increased EDV are predictors of dyssynchrony&#46; Low EF and an enlarged LV are accompanied by geometrical and morphological modifications and by conduction disturbances and changes in contraction patterns&#46; These changes can potentially be reversed by CRT&#46;<a class="elsevierStyleCrossRefs" href="#bib0160"><span class="elsevierStyleSup">32&#8211;34</span></a></p><p id="par0185" class="elsevierStylePara elsevierViewall">We also found that the extent of perfusion defects&#44; particularly of rest perfusion abnormalities&#44; was also associated with increased dyssynchrony&#46; This is not surprising considering that ischemic and infarcted segments exhibit significant degrees of motility changes &#40;hypokinesia&#44; akinesia or dyskinesia&#41;&#44; resulting in abnormal contraction and dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">35</span></a></p><p id="par0190" class="elsevierStylePara elsevierViewall">Considering the presence of CRT criteria &#40;QRS &#8805;120 ms and LVEF &#8804;35&#37;&#41;&#44; two models were built to identify independent predictors of mechanical dyssynchrony and the incremental values of adding these predictors to the conventional CRT criteria&#46; In the model incorporating clinical and gated SPECT MPI variables&#44; SRS and EDV were independent predictors of dyssynchrony and the incremental value of adding them to the CRT criteria was well demonstrated&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">A study by Samad et al&#46; had similar results but their study population had LVEF &#8804;35&#37;&#46; In these they found that QRS width was also an important predictor of mechanical dyssynchrony&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">36</span></a></p><p id="par0200" class="elsevierStylePara elsevierViewall">In the study by Atchey et al&#46; there was a weak correlation between QRS width and dyssynchrony in patients with LVEF between 35 and 50&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a> In our study&#44; only 30&#46;1&#37; of patients had LVEF &#8804;35&#37;&#44; which could partly explain the lack of predictive value of QRS width in our population&#46; It should also be borne in mind that these patients had a very high prevalence of perfusion abnormalities and known CAD&#44; both of which lead to mechanical dyssynchrony&#46; For this reason we also evaluated patients with a rest perfusion score under 10&#37; of LV involvement&#46; In these patients there was a clear relation between QRS width and the occurrence of mechanical dyssynchrony&#59; in fact&#44; QRS &#8805;120 ms was the only predictor of dyssynchrony&#46; Rest perfusion abnormalities are associated with scar tissue&#44; mechanical dyssynchrony and poor CRT response&#46;<a class="elsevierStyleCrossRefs" href="#bib0185"><span class="elsevierStyleSup">37&#8211;40</span></a></p><p id="par0205" class="elsevierStylePara elsevierViewall">Mechanical dyssynchrony has been evaluated by several methods in several contexts&#44; and appears to be common not only in patients with impaired LVEF and wide QRS&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a> According to the literature&#44; mechanical dyssynchrony has additional value over QRS duration in predicting cardiac events in heart failure patients&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">41</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Limitations</span><p id="par0210" class="elsevierStylePara elsevierViewall">This was an observational single-center cohort study with the limitations inherent to this kind of analysis&#46; As symptoms of heart failure and functional class were not assessed&#44; dyssynchrony could not be related to them&#44; and this is an important constraint on further conclusions&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Conclusions</span><p id="par0215" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8226;</span><p id="par0220" class="elsevierStylePara elsevierViewall">Far from questioning previous results and recommendations&#44; this study corroborates the idea that mechanical dyssynchrony&#44; according to established criteria&#44; is highly prevalent in a population with impaired ventricular function and with a high prevalence of perfusion abnormalities&#46;</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">&#8226;</span><p id="par0225" class="elsevierStylePara elsevierViewall">Mechanical dyssynchrony is very common in patients with normal QRS width and mildly abnormal LVEF&#46;</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">&#8226;</span><p id="par0230" class="elsevierStylePara elsevierViewall">It was also found that clinical and MPI variables add value to the CRT criteria for predicting mechanical dyssynchrony&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">&#8226;</span><p id="par0235" class="elsevierStylePara elsevierViewall">In patients with normal or mildly abnormal rest images&#44; QRS width was the only predictor of mechanical dyssynchrony&#46;</p></li><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">&#8226;</span><p id="par0240" class="elsevierStylePara elsevierViewall">In this context&#44; gated SPECT myocardial perfusion imaging&#44; which provides information on ischemia&#44; fibrosis&#44; ventricular function and dyssynchrony&#44; is a valuable aid to therapeutic decision-making&#44; including the use of cardiac resynchronization therapy&#46;</p></li></ul></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Ethical disclosures</span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Protection of human and animal subjects</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that no experiments were performed on humans or animals for this study&#46;</p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Confidentiality of data</span><p id="par0250" class="elsevierStylePara elsevierViewall">The authors declare that they have followed the protocols of their work center on the publication of patient data and that all the patients included in the study received sufficient information and gave their written informed consent to participate in the study&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Right to privacy and informed consent</span><p id="par0255" class="elsevierStylePara elsevierViewall">The authors declare that no patient data appear in this article&#46;</p></span></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Conflicts of interest</span><p id="par0260" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare&#46;</p></span></span>"
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    "fechaRecibido" => "2012-06-17"
    "fechaAceptado" => "2012-09-04"
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          "clase" => "keyword"
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          "palabras" => array:5 [
            0 => "Myocardial perfusion imaging"
            1 => "Gated SPECT"
            2 => "Dyssynchrony"
            3 => "Coronary artery disease"
            4 => "Heart failure"
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          "palabras" => array:5 [
            0 => "Cintigrafia de perfus&#227;o mioc&#225;rdica"
            1 => "<span class="elsevierStyleItalic">Gated SPECT</span>"
            2 => "Dessincronia"
            3 => "Doen&#231;a coron&#225;ria"
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        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Gated SPECT myocardial perfusion imaging &#40;MPI&#41; has been used to quantify mechanical dyssynchrony&#46; Mechanical dyssynchrony appears to be related to response to cardiac resynchronization therapy&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0015">Objective</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">To evaluate the presence and predictors of mechanical dyssynchrony in patients with impaired left ventricular function &#40;LVEF&#41; &#8804;50&#37;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0020">Methods</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The study included 143 consecutive patients referred for gated SPECT MPI with LVEF &#8804;50&#37;&#46; Gated SPECT MPI was performed according to a stress&#47;rest protocol acquiring images with Tc 99m-tetrofosmin&#46; Emory Cardiac Toolbox software was used for phase analysis and a standard deviation &#40;SD&#41; &#8805;43&#176; was considered to indicate mechanical dyssynchrony&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0025">Results</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Mechanical dyssynchrony was present in 53&#46;1&#37; of the patients&#46; Its predictors were diabetes &#40;OR 2&#46;0&#44; p&#8804;0&#46;05&#41;&#44; summed stress score &#40;OR 1&#46;1&#44; p&#8804;0&#46;0005&#41;&#44; summed rest score &#40;OR 1&#46;1&#44; p&#8804;0&#46;0001&#41;&#44; end-diastolic volume &#40;OR 1&#46;0&#44; p&#8804;0&#46;0001&#41;&#44; LVEF &#40;OR 0&#46;9&#44; p&#8804;0&#46;0001&#41;&#44; LVEF &#8804;35&#37; &#40;OR 3&#46;1&#44; p&#8804;0&#46;005&#41; and LVEF &#8804;35&#37; and QRS &#8805;120 ms &#40;OR 3&#46;5&#44; p&#8804;0&#46;05&#41;&#46; In this study QRS width and QRS &#8805;120 ms were not predictors of mechanical dyssynchrony&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0030">Conclusions</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Myocardial perfusion imaging can be used to assess mechanical dyssynchrony&#46; In patients with impaired ventricular function mechanical dyssynchrony was highly prevalent and was related to parameters of left ventricular function and perfusion&#46;</p>"
      ]
      "pt" => array:2 [
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        "resumen" => "<span class="elsevierStyleSectionTitle" id="sect0040">Introdu&#231;&#227;o</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">A avalia&#231;&#227;o de dessincronia ventricular mec&#226;nica atrav&#233;s da an&#225;lise do histograma de fase na cintigrafia de perfus&#227;o mioc&#225;rdica tem sido descrita na literatura&#46; Segundo a evid&#234;ncia atual&#44; a presen&#231;a de dessincronia mec&#226;nica encontra-se relacionada com a resposta &#224; terap&#234;utica de ressincroniza&#231;&#227;o&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0045">Objectivos</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Avaliar a presen&#231;a e os preditores de dessincronia ventricular mec&#226;nica em pacientes com fra&#231;&#227;o de eje&#231;&#227;o ventricular esquerda &#40;FEVE&#41; &#8804; 50&#37;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0050">M&#233;todos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Foram inclu&#237;dos pacientes que realizaram cintigrafia de perfus&#227;o mioc&#225;rdica e cuja FEVE foi inferior ou igual a 50&#37;&#46; A amostra estudada incluiu 143 pacientes&#46; As imagens de perfus&#227;o foram adquiridas de acordo com o protocolo esfor&#231;o seguido de repouso com Tc-99m Tetrafosmina&#46; A avalia&#231;&#227;o de dessincronia baseou-se na determina&#231;&#227;o do desvio padr&#227;o obtido atrav&#233;s da an&#225;lise do histograma de fase &#40;<span class="elsevierStyleItalic">Emory Toolbox Software</span>&#41;&#46; A presen&#231;a de dessincronia foi considerada quando o desvio-padr&#227;o no histograma de fase foi superior ou igual a 43&#176;&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0055">Resultados</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">A presen&#231;a de dessincronia foi observada 53&#44;1&#37; dos doentes&#46; Foram preditores de dessincronia&#44; a diabetes &#40;OR 2&#44;0&#44; p &#8804; 0&#44;05&#41;&#44; o <span class="elsevierStyleItalic">score</span> de esfor&#231;o &#40;OR 1&#44;1&#44; p &#8804; 0&#44;0005&#41;&#44; o <span class="elsevierStyleItalic">score</span> de repouso &#40;OR 1&#44;1&#44; p &#8804; 0&#44;0001&#41;&#44; o volume telediast&#243;lico &#40;OR 1&#44;0&#44; p &#8804; 0&#44;0001&#41;&#44; a FEVE &#40;OR 0&#44;9&#44; p &#8804; 0&#44;0001&#41;&#44; FEVE &#8804; 35&#37; &#40;OR 3&#44;1&#44; p &#8804; 0&#44;005&#41; e a presen&#231;a em simult&#226;neo de FEVE &#8804; 35&#37; e QRS &#8805;120 ms &#40;OR 3&#44;5&#44; p &#8804; 0&#44;05&#41;&#46; Nesta avalia&#231;&#227;o a dura&#231;&#227;o do QRS ou a presen&#231;a de QRS &#8805; 120 ms n&#227;o se relacionaram com a presen&#231;a de dessincronia&#46;</p> <span class="elsevierStyleSectionTitle" id="sect0060">Conclus&#245;es</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">A cintigrafia de perfus&#227;o mioc&#225;rdica pode ser usada na avalia&#231;&#227;o de dessincronia e esta tem uma elevada preval&#234;ncia em pacientes com FEVE diminu&#237;da relacionando-se com par&#226;metros de fun&#231;&#227;o ventricular e perfus&#227;o mioc&#225;rdica&#46;</p>"
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          "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">BBB&#58; bundle branch block&#59; CAD&#58; coronary artery disease&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; SD&#58; standard deviation&#59; SDS&#58; summed difference&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">23 &#40;16&#46;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="2" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="2" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Gated SPECT MPI variables</span></td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>Exercise&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 &#40;14&#46;0&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">110 &#40;76&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12&#46;6&#177;10&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9&#46;5&#177;10&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SDS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;1&#177;4&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">139&#46;8&#177;59&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38&#46;8&#177;8&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">43&#37; &#40;30&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">46&#46;1&#177;20&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SD &#8805;43&#176;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">76&#37; &#40;53&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>SRS &#60;10&#37; LV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">71&#37; &#40;49&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>QRS &#8805;120 ms and LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22&#37; &#40;15&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354973.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Clinical characteristics of the study population&#46;</p>"
        ]
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      2 => array:7 [
        "identificador" => "tbl0010"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">BBB&#58; bundle branch block&#59; CAD&#58; coronary artery disease&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; SD&#58; standard deviation&#59; SDS&#58; summed difference&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">n&#61;143&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#60;43&#176;67 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#8805;43&#176;76 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Male&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">57 &#40;85&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">64 &#40;84&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">62&#46;9&#177;12&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">62&#46;7&#177;11&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">23 &#40;34&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38 &#40;50&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">41 &#40;61&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">47 &#40;61&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Known CAD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22 &#40;32&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">37 &#40;48&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS &#40;0&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS width&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">111&#46;9&#177;33&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">120&#46;1&#177;31&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">24 &#40;35&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38 &#40;50&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">BBB&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;11&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;19&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Exercise&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;16&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">9 &#40;11&#46;8&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">46 &#40;68&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">64 &#40;84&#46;2&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">9&#46;4&#177;8&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">5&#46;8&#177;6&#46;9&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">12&#46;7&#177;11&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SDS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">2&#46;8&#177;4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">3&#46;5&#177;4&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">118&#46;2&#177;48&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">158&#46;6&#177;62&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">12 &#40;17&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">&#8804;0&#46;005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">36&#46;4&#177;9&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5 &#40;7&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t">17 &#40;22&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354974.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Differences between patients with and without mechanical dyssynchrony&#46;</p>"
        ]
      ]
      3 => array:7 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">CI&#58; confidence interval&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SSS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">&#8804;0&#46;0005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&#8804;0&#46;0001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&#8211;1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;001&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;4&#8211;6&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;005&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">3&#46;5&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;3&#8211;10&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354969.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">Univariate predictors of mechanical dyssynchrony&#46;</p>"
        ]
      ]
      4 => array:7 [
        "identificador" => "tbl0020"
        "etiqueta" => "Table 4"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0095" class="elsevierStyleSimplePara elsevierViewall">Chi-square &#61;11&#46;6&#59; p&#8804;0&#46;005 &#40;likelihood ratio&#41;&#46; CI&#58; confidence interval&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;4&#8211;12&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;4&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354971.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0090" class="elsevierStyleSimplePara elsevierViewall">Clinical model&#46;</p>"
        ]
      ]
      5 => array:7 [
        "identificador" => "tbl0025"
        "etiqueta" => "Table 5"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0105" class="elsevierStyleSimplePara elsevierViewall">Chi-square &#61;28&#46;5&#59; p&#8804;0&#46;0001 &#40;likelihood ratio&#41;&#46; CI&#58; confidence interval&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; OR&#58; odds ratio&#59; SRS&#58; summed rest score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">OR&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">CI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;8&#8211;8&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;9&#8211;4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">SRS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;1&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;05&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1&#46;0&#8211;1&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab354970.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0100" class="elsevierStyleSimplePara elsevierViewall">Clinical and MPI model&#46;</p>"
        ]
      ]
      6 => array:7 [
        "identificador" => "tbl0030"
        "etiqueta" => "Table 6"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0115" class="elsevierStyleSimplePara elsevierViewall">CAD&#58; coronary artery disease&#59; EDV&#58; end-diastolic volume&#59; LVEF&#58; left ventricular ejection fraction&#59; SD&#58; standard deviation&#59; SDS&#58; summed difference&#59; SRS&#58; summed rest score&#59; SSS&#58; summed stress score&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">n&#61;71&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#60;43&#176;n&#61;40 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">SD &#8805;43&#176;n&#61;31 &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" style="border-bottom: 2px solid black">p&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Male&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">33 &#40;82&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">24 &#40;77&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">61&#46;1&#177;12&#46;0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">61&#46;5&#177;11&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Diabetes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">13 &#40;32&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">16 &#40;51&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hypertension&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">27 &#40;67&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">21 &#40;67&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Known CAD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">8 &#40;20&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;35&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">QRS width&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="char" valign="\n
                  \t\t\t\t\ttop\n
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                  \t\t\t\t">123&#46;3&#177;34&#46;8&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">&#8804;0&#46;01&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">10 &#40;25&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Abnormal perfusion&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">SDS&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">EDV&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">114&#46;5&#177;49&#46;7&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">137&#46;4&#177;507&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">NS &#40;0&#46;06&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">LVEF &#8804;35&#37;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">6 &#40;15&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">LVEF &#8804;35&#37; and QRS &#8805;120 ms&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="char" valign="\n
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                  \t\t\t\t">NS&nbsp;\t\t\t\t\t\t\n
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                  """
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          "en" => "<p id="spar0120" class="elsevierStyleSimplePara elsevierViewall">Univariate predictors of mechanical dyssynchrony&#46;</p>"
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        0 => array:2 [
          "identificador" => "bibs0005"
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            0 => array:3 [
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Long-term benefits of biventricular pacing in congestive heart failure&#58; results from the MUltisite STimulation in cardiomyopathy &#40;MUSTIC&#41; study"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "C&#46; Linde"
                            1 => "C&#46; Leclercq"
                            2 => "S&#46; Rex"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Am Coll Cardiol"
                        "fecha" => "2002"
                        "volumen" => "40"
                        "paginaInicial" => "111"
                        "paginaFinal" => "118"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12103264"
                            "web" => "Medline"
                          ]
                        ]
                      ]
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                  ]
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              "identificador" => "bib0010"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The effect of cardiac resynchronization on morbidity and mortality in heart failure"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "J&#46;G&#46; Cleland"
                            1 => "J&#46;C&#46; Daubert"
                            2 => "E&#46; Erdmann"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1056/NEJMoa050496"
                      "Revista" => array:6 [
                        "tituloSerie" => "N Engl J Med"
                        "fecha" => "2005"
                        "volumen" => "352"
                        "paginaInicial" => "1539"
                        "paginaFinal" => "1549"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15753115"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0015"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Longer-term effects of cardiac resynchronization therapy on mortality in heart failure &#91;the CArdiac REsynchronization-Heart Failure &#40;CARE-HF&#41; trial extension phase&#93;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "J&#46;G&#46; Cleland"
                            1 => "J&#46;C&#46; Daubert"
                            2 => "E&#46; Erdmann"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1093/eurheartj/ehl099"
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Heart J"
                        "fecha" => "2006"
                        "volumen" => "27"
                        "paginaInicial" => "1928"
                        "paginaFinal" => "1932"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16782715"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0020"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of cardiac resynchronization therapy with or without a defibrillator on survival and hospitalizations in patients with New York Heart Association class IV heart failure"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:3 [
                            0 => "J&#46; Lindenfeld"
                            1 => "A&#46;M&#46; Feldman"
                            2 => "L&#46; Saxon"
                          ]
                        ]
                      ]
                    ]
                  ]
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                    0 => array:2 [
                      "doi" => "10.1161/CIRCULATIONAHA.106.629261"
                      "Revista" => array:6 [
                        "tituloSerie" => "Circulation"
                        "fecha" => "2007"
                        "volumen" => "115"
                        "paginaInicial" => "204"
                        "paginaFinal" => "212"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/17190867"
                            "web" => "Medline"
                          ]
                        ]
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                    ]
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                ]
              ]
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            4 => array:3 [
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Informação do artigo
ISSN: 08702551
Idioma original: Inglês
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2024 Maio 56 30 86
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2022 Dezembro 63 24 87
2022 Novembro 55 39 94
2022 Outubro 48 25 73
2022 Setembro 50 44 94
2022 Agosto 51 26 77
2022 Julho 50 40 90
2022 Junho 44 44 88
2022 Maio 42 37 79
2022 Abril 43 43 86
2022 Maro 79 57 136
2022 Fevereiro 41 37 78
2022 Janeiro 50 32 82
2021 Dezembro 29 38 67
2021 Novembro 87 33 120
2021 Outubro 42 45 87
2021 Setembro 49 34 83
2021 Agosto 41 39 80
2021 Julho 31 30 61
2021 Junho 46 29 75
2021 Maio 70 37 107
2021 Abril 101 36 137
2021 Maro 85 24 109
2021 Fevereiro 81 15 96
2021 Janeiro 61 30 91
2020 Dezembro 56 14 70
2020 Novembro 44 21 65
2020 Outubro 52 27 79
2020 Setembro 106 42 148
2020 Agosto 26 16 42
2020 Julho 36 10 46
2020 Junho 62 22 84
2020 Maio 51 19 70
2020 Abril 61 18 79
2020 Maro 64 17 81
2020 Fevereiro 93 28 121
2020 Janeiro 50 13 63
2019 Dezembro 51 9 60
2019 Novembro 61 8 69
2019 Outubro 55 8 63
2019 Setembro 58 14 72
2019 Agosto 38 8 46
2019 Julho 44 11 55
2019 Junho 41 20 61
2019 Maio 75 21 96
2019 Abril 41 35 76
2019 Maro 95 11 106
2019 Fevereiro 79 21 100
2019 Janeiro 44 12 56
2018 Dezembro 99 21 120
2018 Novembro 199 14 213
2018 Outubro 505 20 525
2018 Setembro 84 16 100
2018 Agosto 199 14 213
2018 Julho 44 10 54
2018 Junho 57 14 71
2018 Maio 100 19 119
2018 Abril 73 13 86
2018 Maro 105 21 126
2018 Fevereiro 45 8 53
2018 Janeiro 108 12 120
2017 Dezembro 142 14 156
2017 Novembro 49 12 61
2017 Outubro 62 11 73
2017 Setembro 61 11 72
2017 Agosto 72 8 80
2017 Julho 32 15 47
2017 Junho 52 15 67
2017 Maio 40 18 58
2017 Abril 40 12 52
2017 Maro 28 2 30
2017 Fevereiro 22 8 30
2017 Janeiro 26 5 31
2016 Dezembro 35 7 42
2016 Novembro 20 6 26
2016 Outubro 32 15 47
2016 Setembro 8 7 15
2016 Agosto 11 4 15
2016 Julho 15 7 22
2016 Junho 24 9 33
2016 Maio 5 8 13
2016 Abril 46 3 49
2016 Maro 54 9 63
2016 Fevereiro 72 24 96
2016 Janeiro 62 10 72
2015 Dezembro 64 6 70
2015 Novembro 51 8 59
2015 Outubro 54 12 66
2015 Setembro 69 6 75
2015 Agosto 60 7 67
2015 Julho 46 9 55
2015 Junho 36 7 43
2015 Maio 69 13 82
2015 Abril 68 10 78
2015 Maro 65 6 71
2015 Fevereiro 69 4 73
2015 Janeiro 76 9 85
2014 Dezembro 92 9 101
2014 Novembro 86 4 90
2014 Outubro 126 14 140
2014 Setembro 89 14 103
2014 Agosto 102 12 114
2014 Julho 117 11 128
2014 Junho 116 8 124
2014 Maio 88 11 99
2014 Abril 53 8 61
2014 Maro 67 18 85
2014 Fevereiro 89 21 110
2014 Janeiro 81 19 100
2013 Dezembro 62 15 77
2013 Novembro 66 20 86
2013 Outubro 61 11 72
2013 Setembro 53 15 68
2013 Agosto 66 31 97
2013 Julho 93 33 126
2013 Junho 61 30 91
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