que se leu este artigo
array:25 [ "pii" => "S0870255119305001" "issn" => "08702551" "doi" => "10.1016/j.repc.2019.09.001" "estado" => "S300" "fechaPublicacion" => "2019-08-01" "aid" => "1429" "copyright" => "Sociedade Portuguesa de Cardiologia" "copyrightAnyo" => "2019" "documento" => "article" "crossmark" => 1 "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/" "subdocumento" => "fla" "cita" => "Rev Port Cardiol. 2019;38:573-80" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:2 [ "total" => 424 "formatos" => array:3 [ "EPUB" => 42 "HTML" => 289 "PDF" => 93 ] ] "Traduccion" => array:1 [ "en" => array:20 [ "pii" => "S2174204919302430" "issn" => "21742049" "doi" => "10.1016/j.repce.2019.11.010" "estado" => "S300" "fechaPublicacion" => "2019-08-01" "aid" => "1429" "copyright" => "Sociedade Portuguesa de Cardiologia" "documento" => "article" "crossmark" => 1 "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/" "subdocumento" => "fla" "cita" => "Rev Port Cardiol. 2019;38:573-80" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:2 [ "total" => 163 "formatos" => array:3 [ "EPUB" => 29 "HTML" => 98 "PDF" => 36 ] ] "en" => array:13 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>" "titulo" => "Advantages and limitations of 18-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography/computed tomography in the diagnosis of infective endocarditis" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => array:2 [ 0 => "en" 1 => "pt" ] "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "573" "paginaFinal" => "580" ] ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Valor acrescentado e limitações da tomografia por emissão de positrões 18-fluoro-2-deoxiglicose – tomografia computadorizada no diagnóstico de endocardite infecciosa" ] ] "contieneResumen" => array:2 [ "en" => true "pt" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0025" "etiqueta" => "Figure 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 1363 "Ancho" => 1674 "Tamanyo" => 182606 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Infective endocarditis in a mechanical aortic valve in a 77-year-old male with a mechanical aortic valve, referred after two weeks of fever and back pain. He presented blood cultures positive for <span class="elsevierStyleItalic">Streptococcus bovis</span>. Transesophageal echocardiography and prospective ECG-gated cardiac CT results were negative for endocarditis. <span class="elsevierStyleSup">18</span>F-FDG P ET study revealed hypermetabolism in the aortic valve annulus (SUV<span class="elsevierStyleInf">max</span> 2.8) (A and B) and in the lumbar column at L3-L4 level (SUV<span class="elsevierStyleInf">max</span> 6.3) (C), and radiopharmaceutical uptake is visible in the descending colon at the splenic angle (SUV<span class="elsevierStyleInf">max</span> 7.9) (D). A colonoscopy with biopsy was performed, resulting in the detection of adenocarcinoma of the colon.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Estephany Abou Jokh Casas, Virginia Pubul Núñez, María del Carmen Pombo Pasín, Miguel Garrido Pumar, Maria Amparo Martinez, Charigan Abou Jokh Casas, Anxo Martinez de Alegria, Maria Jesús Domínguez, Alvaro Ruibal Morell" "autores" => array:9 [ 0 => array:2 [ "nombre" => "Estephany" "apellidos" => "Abou Jokh Casas" ] 1 => array:2 [ "nombre" => "Virginia" "apellidos" => "Pubul Núñez" ] 2 => array:2 [ "nombre" => "María del Carmen" "apellidos" => "Pombo Pasín" ] 3 => array:2 [ "nombre" => "Miguel" "apellidos" => "Garrido Pumar" ] 4 => array:2 [ "nombre" => "Maria Amparo" "apellidos" => "Martinez" ] 5 => array:2 [ "nombre" => "Charigan" "apellidos" => "Abou Jokh Casas" ] 6 => array:2 [ "nombre" => "Anxo" "apellidos" => "Martinez de Alegria" ] 7 => array:2 [ "nombre" => "Maria Jesús" "apellidos" => "Domínguez" ] 8 => array:2 [ "nombre" => "Alvaro" "apellidos" => "Ruibal Morell" ] ] ] ] ] "idiomaDefecto" => "en" "Traduccion" => array:1 [ "en" => array:9 [ "pii" => "S0870255119305001" "doi" => "10.1016/j.repc.2019.09.001" "estado" => "S300" "subdocumento" => "" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255119305001?idApp=UINPBA00004E" ] ] "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2174204919302430?idApp=UINPBA00004E" "url" => "/21742049/0000003800000008/v2_202001022214/S2174204919302430/v2_202001022214/en/main.assets" ] ] "itemSiguiente" => array:19 [ "pii" => "S0870255119305220" "issn" => "08702551" "doi" => "10.1016/j.repc.2019.10.002" "estado" => "S300" "fechaPublicacion" => "2019-08-01" "aid" => "1438" "copyright" => "Sociedade Portuguesa de Cardiologia" "documento" => "simple-article" "crossmark" => 1 "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/" "subdocumento" => "dis" "cita" => "Rev Port Cardiol. 2019;38:581-2" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:2 [ "total" => 416 "formatos" => array:3 [ "EPUB" => 28 "HTML" => 257 "PDF" => 131 ] ] "en" => array:10 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Editorial comment</span>" "titulo" => "Infective endocarditis: Positron emission tomography/computed tomography in clinical practice" "tienePdf" => "en" "tieneTextoCompleto" => "en" "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "581" "paginaFinal" => "582" ] ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Endocardite infeciosa: TC-PET na prática clínica" ] ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Maria João Vidigal Ferreira" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Maria João" "apellidos" => "Vidigal Ferreira" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255119305220?idApp=UINPBA00004E" "url" => "/08702551/0000003800000008/v2_201912121502/S0870255119305220/v2_201912121502/en/main.assets" ] "itemAnterior" => array:19 [ "pii" => "S0870255119305037" "issn" => "08702551" "doi" => "10.1016/j.repc.2019.09.003" "estado" => "S300" "fechaPublicacion" => "2019-08-01" "aid" => "1432" "copyright" => "Sociedade Portuguesa de Cardiologia" "documento" => "simple-article" "crossmark" => 1 "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/" "subdocumento" => "dis" "cita" => "Rev Port Cardiol. 2019;38:571-2" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:2 [ "total" => 456 "formatos" => array:3 [ "EPUB" => 39 "HTML" => 317 "PDF" => 100 ] ] "en" => array:11 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Editorial comment</span>" "titulo" => "Gender differences in lipid profile and therapy" "tienePdf" => "en" "tieneTextoCompleto" => "en" "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "571" "paginaFinal" => "572" ] ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Diferenças de género no perfil lipídico e na terapia" ] ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 996 "Ancho" => 1577 "Tamanyo" => 55497 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Visceral fat areas determined by computed tomography according to age in men (M) and women (W) in the 161 participants of the community study, 31.7% aged 40-49, 30.4% 50-59, 23.6% 60-69 and 14.3% ≥70 years.<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">2</span></a></p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Pedro von Hafe" "autores" => array:1 [ 0 => array:2 [ "nombre" => "Pedro" "apellidos" => "von Hafe" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0870255119305037?idApp=UINPBA00004E" "url" => "/08702551/0000003800000008/v2_201912121502/S0870255119305037/v2_201912121502/en/main.assets" ] "en" => array:19 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>" "titulo" => "Advantages and limitations of 18-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography/computed tomography in the diagnosis of infective endocarditis" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "573" "paginaFinal" => "580" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Estephany Abou Jokh Casas, Virginia Pubul Núñez, María del Carmen Pombo Pasín, Miguel Garrido Pumar, Maria Amparo Martinez, Charigan Abou Jokh Casas, Anxo Martinez de Alegria, Maria Jesús Domínguez, Alvaro Ruibal Morell" "autores" => array:9 [ 0 => array:4 [ "nombre" => "Estephany" "apellidos" => "Abou Jokh Casas" "email" => array:1 [ 0 => "estephanyaboujokh@gmail.com" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] 1 => array:2 [ "nombre" => "Virginia" "apellidos" => "Pubul Núñez" ] 2 => array:2 [ "nombre" => "María del Carmen" "apellidos" => "Pombo Pasín" ] 3 => array:2 [ "nombre" => "Miguel" "apellidos" => "Garrido Pumar" ] 4 => array:2 [ "nombre" => "Maria Amparo" "apellidos" => "Martinez" ] 5 => array:2 [ "nombre" => "Charigan" "apellidos" => "Abou Jokh Casas" ] 6 => array:2 [ "nombre" => "Anxo" "apellidos" => "Martinez de Alegria" ] 7 => array:2 [ "nombre" => "Maria Jesús" "apellidos" => "Domínguez" ] 8 => array:2 [ "nombre" => "Alvaro" "apellidos" => "Ruibal Morell" ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Complejo Hospitalario Universitario Santiago de Compostela, Santiago de Compostela, Spain" "identificador" => "aff0005" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "pt" => array:1 [ "titulo" => "Valor acrescentado e limitações da tomografia por emissão de positrões 18-fluoro-2-deoxiglicose – tomografia computadorizada no diagnóstico de endocardite infecciosa" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0030" "etiqueta" => "Figure 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 1072 "Ancho" => 1674 "Tamanyo" => 153052 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Infective endocarditis in the native mitral valve and bioprosthetic aortic valve in an 88-year-old male hospitalized due to persistent fever and blood cultures positive for <span class="elsevierStyleItalic">Streptococcus viridans</span>. Echocardiographic results show a vegetation on the native mitral valve and no alterations in the bioprosthetic aortic valve. <span class="elsevierStyleSup">18</span>F-FDG PET images show two positive uptake foci, in (A) the native mitral valve (SUV<span class="elsevierStyleInf">max</span> 7.5) and (B–D) the prosthetic aortic valve (SUV<span class="elsevierStyleInf">max</span> 5.1).</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Infective endocarditis (IE) can be deadly if not managed early. Its poor prognosis is associated with failure to identify prosthetic and periprosthetic damage early, leading to delays in the introduction of treatments such as antibiotics and surgery.<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">1</span></a> Therefore, this medical challenge should be managed by a multidisciplinary endocarditis team experienced in diagnosing and treating this disease.</p><p id="par0010" class="elsevierStylePara elsevierViewall">In general, patients with suspected IE undergo various tests to reach the correct diagnosis. These may include transthoracic echocardiography, blood tests, microbiological cultures and other imaging tests such as transesophageal echocardiography (TEE) and computed tomography (CT).</p><p id="par0015" class="elsevierStylePara elsevierViewall">The diagnosis of IE is even more difficult in patients with intracardiac devices or prosthetic valves (approximately 20% of all IE patients). In these patients, interpretation of echocardiographic findings is more difficult, and it is more difficult to apply the standard Duke criteria. This patient group also has higher mortality than those without intracardiac devices. In this context, new diagnostic tools for IE, such as cardiac nuclear magnetic resonance and [<span class="elsevierStyleSup">18</span>F]2-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography (<span class="elsevierStyleSup">18</span>F-FDG PET), are proving their utility in the diagnosis of IE.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">2</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleSup">18</span>F-FDG PET has proved to be a very useful technique for detecting infection, not only due to its high sensitivity in diagnosing IE, but also by demonstrating possible septic embolisms, thereby dramatically changing the clinical approach and treatment of these patients.<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">3,4</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Our aim was to evaluate the usefulness of <span class="elsevierStyleSup">18</span>F-FDG PET in the diagnosis of this disease.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Patient eligibility</span><p id="par0030" class="elsevierStylePara elsevierViewall">A prospective study was carried out including 43 patients with suspected IE between 2014 and 2017 in the Department of Cardiology and Nuclear Medicine of our medical center. These patients had previously been selected by a multidisciplinary endocarditis team. Twenty-five of them were previously classified as possible IE, eight as definitive IE and 10 as rejected IE, using the modified Duke criteria.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a><a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a> shows a flowchart of the progress of the 43 patients enrolled in the study period.</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0035" class="elsevierStylePara elsevierViewall">Of the total of 43 patients, 38 were male and 5 female. The median age was 71 years (25-88 years). The main presenting symptoms were fever and chest pain. Nineteen of the subjects had prosthetic valves (eight biological aortic valves, eight mechanical aortic valves and three mechanical mitral valves), six had native valves, seven had intracardiac devices (two with Bentall grafts and five with pacemakers), and one had both a mechanical aortic valve and a pacemaker.</p><p id="par0040" class="elsevierStylePara elsevierViewall">Endocarditis was suspected in the presence of at least one of the following signs and symptoms with no clear origin: persistent fever >38<span class="elsevierStyleHsp" style=""></span>°C; unexplained high C-reactive protein levels; positive blood cultures for the bacteria usually responsible for IE; or abnormal findings on echocardiography such as vegetation, abscess, pseudoaneurysm, intracardiac fistula, valvular perforation or aneurysm, or new partial dehiscence of a prosthetic valve.<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">4</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">The final diagnosis was made according to the modified Duke criteria<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a> and the microbiological and anatomopathological analysis of valve tissue in patients who underwent valve replacement. All patients underwent physical examination, laboratory tests and microbiological cultures, chest X-ray, TEE and a chest CT scan 24-48 hours before <span class="elsevierStyleSup">18</span>F-FDG PET.</p><p id="par0050" class="elsevierStylePara elsevierViewall">The indication for <span class="elsevierStyleSup">18</span>F-FDG PET was intended as an additional tool to diagnose IE, to assess valve infections and peripheral embolisms, or to rule out any other infectious focus. The mean time between TEE and <span class="elsevierStyleSup">18</span>F-FDG PET was two days (1-3 days) in hospitalized patients. In patients who had undergone previous cardiac valve surgery, no <span class="elsevierStyleSup">18</span>F-FDG PET was carried out less than three months post-intervention and none of our subjects had undergone surgery with BioGlue surgical adhesive, which is known to give false positives in <span class="elsevierStyleSup">18</span>F-FDG PET.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Imaging protocols</span><p id="par0055" class="elsevierStylePara elsevierViewall">To acquire a high-quality PET scan, all patients were required to follow a low-carbohydrate, fatty acid-rich diet for at least 12 hours prior to the test, to reduce physiological glucose uptake from the myocardium. Subjects also fasted for six hours before they were administered 370 MBq (10 mCi) of <span class="elsevierStyleSup">18</span>F-FDG, after checking that glucose levels were <1.8 g/l. A whole-body <span class="elsevierStyleSup">18</span>F-FDG PET scan was carried out 45 minutes after the injection and, in patients with negative or doubtful <span class="elsevierStyleSup">18</span>F-FDG uptake, a three-dimensional thoracic image was constructed. Patients with no previous medical contraindications were also intravenously administered a bolus of low-molecular weight heparin (50 IU/kg), 15 min prior to the <span class="elsevierStyleSup">18</span>F-FDG injection, to further reduce physiological uptake by increasing liver lipolysis.</p><p id="par0060" class="elsevierStylePara elsevierViewall">All <span class="elsevierStyleSup">18</span>F-FDG PET images were fused with synchronized chest CT structural images. Both images were then reconstructed using IntelliSpace Portal 8.0 software.</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Image interpretation and final diagnosis</span><p id="par0065" class="elsevierStylePara elsevierViewall">Two physicians, specialists in nuclear medicine, assessed the corrected and uncorrected images. In the event of disagreement, a consensus was reached in discussion with a third physician. Any hypermetabolic area was considered pathological in native and prosthetic valves as well as in intracardiac devices. <span class="elsevierStyleSup">18</span>F-FDG uptake identified in the attenuation-corrected and uncorrected images was classified as focal, patchy or diffuse, and related to native, prosthetic and intracardiac devices. The intensity of <span class="elsevierStyleSup">18</span>F-FDG uptake was determined by measuring the maximum standardized uptake value (SUV<span class="elsevierStyleInf">max</span>).</p><p id="par0070" class="elsevierStylePara elsevierViewall">The final diagnosis of IE was made by a multidisciplinary team, applying the modified Duke criteria.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a> A definitive diagnosis of IE was reached in patients with two major criteria or one major plus three minor criteria or five minor criteria. A possible diagnosis of IE was made in patients with one major criterion plus one minor criterion or three minor criteria. The diagnosis was rejected when there was a firm alternative diagnosis explaining the symptoms of IE, when symptoms resolved before completion of four days of antibiotic treatment, or when patients did not meet criteria for possible IE.</p><p id="par0075" class="elsevierStylePara elsevierViewall">Written and verbal consent was obtained from all patients, using the approved protocol at our center.</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Statistical analysis</span><p id="par0080" class="elsevierStylePara elsevierViewall">Statistical analyses were performed on the data obtained using IBM SPSS version 23.0. <span class="elsevierStyleSup">18</span>F-FDG PET results fused with CT images were analyzed and compared with TEE findings using the chi-square test. The reasons for any discordant findings were also analyzed. The diagnostic performance of <span class="elsevierStyleSup">18</span>F-FDG PET compared to TEE for the diagnosis of IE in prosthetic valves, intracardiac devices and native valves (sensitivity, specificity, positive predictive value [PPV], and negative predictive value [NPV], and their 95% confidence intervals) was also determined and compared with the final diagnosis, reached according to the modified Duke criteria,<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a> considered the gold standard in this condition. Finally, anatomical (affected valves and intracardiac devices), microbiological and bacteriological findings were analyzed.</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Results</span><p id="par0085" class="elsevierStylePara elsevierViewall">Of 43 patients with suspected IE, the final diagnosis according to the modified Duke criteria was IE in 30 cases, in whom <span class="elsevierStyleSup">18</span>F-FDG PET was positive in 24 patients, showing hypermetabolic uptake on 17 prosthetic valves, two native valves and five intracardiac devices (two Bentall grafts and three pacemakers). By contrast, TEE results were positive for IE in only 11 patients and negative in 19, being concordant with the <span class="elsevierStyleSup">18</span>F-FDG PET results in 11 cases.</p><p id="par0090" class="elsevierStylePara elsevierViewall">The technical sensitivity of <span class="elsevierStyleSup">18</span>F-FDG PET was 80%, specificity 92%, PPV 96% and NPV 66%. TEE had sensitivity, specificity, PPV and NPV of 36%, 84%, 84% and 36%, respectively (p<0.001).</p><p id="par0095" class="elsevierStylePara elsevierViewall">Additionally, six patients diagnosed with IE had normal cardiac <span class="elsevierStyleSup">18</span>F-FDG PET results (false negatives: 20%). Two of these patients were later diagnosed with IE secondary to pacemaker lead infection and the <span class="elsevierStyleSup">18</span>F-FDG PET was conducted only days (less than two weeks) after antibiotic therapy. Two other patients were diagnosed with IE in a native aortic valve, another with IE in both native mitral and aortic valves, and the sixth was diagnosed with an abscess in a native mitral valve.</p><p id="par0100" class="elsevierStylePara elsevierViewall">In patients with negative or doubtful TEE results, the diagnosis of IE was reached through <span class="elsevierStyleSup">18</span>F-FDG PET (this discordance occurred in 19 out of 30 patients).</p><p id="par0105" class="elsevierStylePara elsevierViewall">The sensitivity, specificity, PPV and NPV of these two diagnostic techniques in patients with prosthetic valves and intracardiac devices were compared to those with native valves. The diagnostic performance of <span class="elsevierStyleSup">18</span>F-FDG PET in patients with prosthetic valves and intracardiac devices was as follows: sensitivity 91%, specificity 85%, PPV 95% and NPV 75%, vs. 33%, 100%, 100% and 60% (p<0.00001) respectively, in patients with native valves. With respect to echocardiographic findings in patients with prosthetic valves and intracardiac devices, sensitivity was 25%, specificity 100%, PPV 100% and NPV 28%, compared with 83%, 66%, 71% and 80% in patients diagnosed with IE in native valves (p<0.135). The results are shown in <a class="elsevierStyleCrossRef" href="#fig0010">Figure 2</a>.</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0110" class="elsevierStylePara elsevierViewall">Of the 24 cases diagnosed with IE, 16 patients had focal uptake on <span class="elsevierStyleSup">18</span>F-FDG PET, with a mean SUV<span class="elsevierStyleInf">max</span> of 2.70 g/ml, and eight patients had a patchy uptake, with a mean SUV<span class="elsevierStyleInf">max</span> of 6.67 (p=0.02, 95% confidence interval 4.71-8.49). Only one patient who did not meet all criteria for IE had positive diffuse uptake, with an SUV<span class="elsevierStyleInf">max</span> of 4.04; in this case the diagnosis was later rejected and was considered the only false positive of this study. This false result was attributed to an inflammatory response following cardiac surgery (3.5 months previously).</p><p id="par0115" class="elsevierStylePara elsevierViewall">IE was excluded as a final diagnosis in 13 patients who did not fulfill the Duke criteria and tested negative on both echocardiography and <span class="elsevierStyleSup">18</span>F-FDG PET (true negatives), the results being concordant in 100% of cases. These patients were later diagnosed with different conditions, including bacteremia following urinary infection, systemic sepsis, septic shock, severe mitral insufficiency, pneumonia and acute coronary syndrome.</p><p id="par0120" class="elsevierStylePara elsevierViewall">It should be added that of the 25 patients who had possible IE (24 true positives and one false positive), 22 cases were reclassified as definitive IE, two cases were rejected, and one patient remained as a possible case of IE in the follow-up. These findings are shown in <a class="elsevierStyleCrossRef" href="#fig0015">Figure 3</a>.</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0125" class="elsevierStylePara elsevierViewall">Following diagnosis, all patients were treated with a prolonged course of antibiotic therapy (6-12 months), carefully selected according to previous antibiogram results from valve and blood cultures.</p><p id="par0130" class="elsevierStylePara elsevierViewall">The most common microbiological findings were <span class="elsevierStyleItalic">Staphylococcus epidermidis</span>, followed by <span class="elsevierStyleItalic">Staphylococcus aureus</span>, then <span class="elsevierStyleItalic">Streptococcus bovis</span>. Patients who tested negative in microbiological exams were being treated with antibiotics at the time of the tests. In these cases, the diagnosis was reached through <span class="elsevierStyleSup">18</span>F-FDG PET.</p><p id="par0135" class="elsevierStylePara elsevierViewall">Nine deaths (30%) occurred during the study period, due to secondary complications, the most common being systemic sepsis, septic shock and heart failure.</p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Discussion</span><p id="par0140" class="elsevierStylePara elsevierViewall">The diagnosis of IE is becoming more challenging due to a variety of factors, which include the indiscriminate use of antimicrobial agents, underlying conditions in frail, elderly patients such as immunosuppression, and cardiovascular surgical procedures such as the placement of prosthetic valves and intravascular and intracardiac devices.</p><p id="par0145" class="elsevierStylePara elsevierViewall">The results obtained in this study show that <span class="elsevierStyleSup">18</span>F-FDG PET for the diagnosis of IE in patients with prosthetic valves and intracardiac devices is a useful technique to obtain a rapid diagnosis, particularly in patients whose TEE images are doubtful, inconclusive or even negative (<a class="elsevierStyleCrossRef" href="#fig0020">Figure 4</a>).</p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0150" class="elsevierStylePara elsevierViewall">We found a substantial benefit in the use of <span class="elsevierStyleSup">18</span>F-FDG PET due to its high sensitivity and specificity in the diagnosis of this disease. It should also be added that these findings have a significant impact on mortality and morbidity in these patients, due to early diagnosis and hence the ability to begin immediate treatment.<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">5</span></a> In the European Society of Cardiology's latest guidelines for the management of IE (2015), the modified diagnostic criteria include abnormal activity around the site of prosthetic valve implantation detected by <span class="elsevierStyleSup">18</span>F-FDG PET (only if the prosthesis was implanted for >3 months) or by radiolabeled leukocyte single-photon emission computed tomography/CT.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a> In summary, the sensitivity of the Duke criteria can be improved by using imaging modalities such as <span class="elsevierStyleSup">18</span>F-FDG PET/CT. Sarrazin et al.<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">4</span></a> show that cardiac imaging plays an important role in the diagnosis and management of patients with cardiovascular implantable electronic device infection or periprosthetic valve infection. Furthermore, Saby et al. support the use of <span class="elsevierStyleSup">18</span>F-FDG PET as a major criterion for the diagnosis of IE in prosthetic valves.<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">6</span></a></p><p id="par0155" class="elsevierStylePara elsevierViewall">It should be noted that in our study population the usefulness of this diagnostic test decreased markedly in patients with IE in a native valve. In these patients TEE proved to be more useful. This applied to five cases in our population diagnosed with IE, without hypermetabolic uptake on <span class="elsevierStyleSup">18</span>F-FDG PET, representing false negative results. Two of these patients were diagnosed with IE due to pacemaker lead infection, one had IE in a native aortic valve and two were diagnosed with an abscess surrounding a native aortic valve.</p><p id="par0160" class="elsevierStylePara elsevierViewall">By contrast, four of these patients had pathological TEE findings, adding a major criterion to diagnosis by the Duke criteria. These findings show that although <span class="elsevierStyleSup">18</span>F-FDG PET is a useful technique with prosthetic and cardiac devices, it has serious limitations regarding native valves and small lesions with limited visual space (<1 cm), as is the case with pacemaker lead endocarditis. Ricciardi et al.<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">1</span></a> demonstrated the usefulness of PET/CT for IE in prosthetic valves, in contrast to its failure to detect infection in native valves, proving that this tool is not appropriate for establishing or ruling out infection of native cardiac valves.</p><p id="par0165" class="elsevierStylePara elsevierViewall">In patients fulfilling the Duke criteria with a pathological result on TEE, the added value of <span class="elsevierStyleSup">18</span>F-FDG PET is to exclude possible septic embolisms, which can lead to complications such as permanent neurological damage or even death.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">2</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">Another advantage of this technique is its ability to detect another infectious focus or even an oncological origin of the IE, revealing pre-malignant or malignant lesions, curative resection of which may be possible if they are discovered at an early stage.<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">7</span></a> One patient in our study was referred due to neurological symptoms and was later diagnosed as having had a cerebral stroke following a septic embolism related to IE in a prosthetic aortic valve; this diagnosis was arrived at through <span class="elsevierStyleSup">18</span>F-FDG PET. Another patient who underwent <span class="elsevierStyleSup">18</span>F-FDG PET for IE had high uptake in the colon, which led to a colonoscopy being performed; adenocarcinoma of the colon was later diagnosed (<a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a>). Another patient in our study population had positive findings on TEE, a vegetation on the native mitral valve, and underwent <span class="elsevierStyleSup">18</span>F-FDG PET to exclude septic embolisms; in this patient pathological uptake was found in the native mitral and the prosthetic aortic valve (<a class="elsevierStyleCrossRef" href="#fig0030">Figure 6</a>).</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia><elsevierMultimedia ident="fig0030"></elsevierMultimedia><p id="par0175" class="elsevierStylePara elsevierViewall">It should be mentioned that the tendency of our results toward better outcomes regarding the diagnosis of this disease using <span class="elsevierStyleSup">18</span>F-FDG PET, thus obtaining higher sensitivity (80%), may be because the patients included in the study were selected by a specialized endocarditis team in our medical center due to a high degree of suspicion. This situation may constitute a possible selection bias in our study population, thereby inclining these findings toward perhaps excessively positive results.</p><p id="par0180" class="elsevierStylePara elsevierViewall">With respect to SUV<span class="elsevierStyleInf">max</span>, higher values are known to be more suggestive of the presence of infection. However, there is currently no fixed cut-off that will definitively identify IE. In our study population, patients with patchy cardiac uptake had a significantly higher SUV<span class="elsevierStyleInf">max</span> than those with focal uptake, leading to statistically significant results. Nevertheless, to our knowledge, there is currently no evidence in the literature that supports these findings. Pizzi et al.<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">8</span></a> differentiated between infection and inflammation in patients with suspected IE, using the different patterns of <span class="elsevierStyleSup">18</span>F-FDG distribution (focal, patchy and diffuse), intensity and location. It should be noted that SUV<span class="elsevierStyleInf">max</span> values are strongly affected by external factors, such as the time between radiotracer injection and PET scan, body composition and habitus, length of uptake period, plasma glucose and the partial volume effect, leading to considerable variability between patients.<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">9</span></a></p><p id="par0185" class="elsevierStylePara elsevierViewall">Although this technique has proved to have clear advantages, it also has some limitations. One of the most common is that it is not available in all medical centers or even countries.</p><p id="par0190" class="elsevierStylePara elsevierViewall">Another limitation is represented by the physiological uptake of <span class="elsevierStyleSup">18</span>F-FDG from the myocardium, which can prevent accurate detection of cardiac infections. However, this problem was not found in our study population. Furthermore, cardiac uptake in <span class="elsevierStyleSup">18</span>F-FDG PET/CT results should be interpreted with caution in patients who have undergone cardiac surgery less than three months before testing, since the postoperative inflammatory response may result in non-specific <span class="elsevierStyleSup">18</span>F-FDG uptake.</p><p id="par0195" class="elsevierStylePara elsevierViewall">In addition, many pathological conditions can mimic <span class="elsevierStyleSup">18</span>F-FDG uptake as a focal increase pattern typically observed in IE, such as the presence of active thrombi, soft atherosclerotic plaques, vasculitis, primary cardiac tumors, cardiac metastasis from a non-cardiac tumor, post-surgical inflammation, and foreign body reactions, leading to false positive results.<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">3</span></a></p><p id="par0200" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleSup">18</span>F-FDG PET also has limitations in detecting septic emboli in the brain, due to the high physiological uptake of this radiotracer in the cerebral cortex and since metastatic infections in this location are usually smaller than 5 mm, which is the spatial resolution threshold of current PET scanners.<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">5</span></a></p><p id="par0205" class="elsevierStylePara elsevierViewall">One of the most important limitations of this study was the unavailability of a PET/contrast-enhanced CT machine in our medical center, necessitating fusion of CT and PET images acquired at different times. Consequently, time and effort had to be expended to obtain the location of increased focus uptake in most cases. As well as establishing the added value of PET/TC, improving the diagnostic accuracy of the modified Duke criteria in 92 patients with IE and prosthetic valves and cardiac devices, Pizzi et al.<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">2</span></a> also showed that the use of PET/contrast-enhanced CT yielded even better diagnostic performance values than PET/non-enhanced CT. However, putting aside this limitation, we can state that our results were both good and conclusive, with the advantage of lower radiation exposure for our patients and a high rate of successful diagnosis.</p><p id="par0210" class="elsevierStylePara elsevierViewall">Another useful technique to diagnose IE, when echocardiography and <span class="elsevierStyleSup">18</span>F-FDG PET are inconclusive or even negative, is labeled-leukocyte scintigraphy, which has a high specificity for infectious diseases. However, this method is time-consuming, requires blood manipulation and its sensitivity is significantly lower than that of <span class="elsevierStyleSup">18</span>F-FDG PET, especially when patients are receiving long-term antibiotic therapy.<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">10</span></a> Nevertheless, it can be useful as a second-line imaging diagnostic technique in patients for whom the diagnosis is unclear. This sequential strategy could prove valuable in the assessment of patients in the first three months after cardiac surgery.</p><p id="par0215" class="elsevierStylePara elsevierViewall">In the near future, antimicrobial therapy response may be monitored using <span class="elsevierStyleSup">18</span>F-FDG PET/CT, although insufficient data are currently available to make this a general recommendation.<a class="elsevierStyleCrossRefs" href="#bib0115"><span class="elsevierStyleSup">11,12</span></a> Further research needs to be carried out to improve the diagnosis of pacemaker lead IE.</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conclusions</span><p id="par0220" class="elsevierStylePara elsevierViewall">Our experience supports the hypothesis that <span class="elsevierStyleSup">18</span>F-FDG PET is a valuable technique in the early diagnosis of IE, particularly in patients with prosthetic valves and intracardiac devices. However, its accuracy is more limited in the assessment of IE in native valves or patients with pacemakers. TEE presents high sensitivity for diagnosing IE in native valves, but this diagnostic value decreases dramatically in patients with prosthetic valves and intracardiac devices.</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Key points</span><p id="par0225" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">•</span><p id="par0230" class="elsevierStylePara elsevierViewall">It is well known that early diagnosis of IE is vital and that <span class="elsevierStyleSup">18</span>F-FDG PET fused with CT is extremely helpful for this purpose, especially in patients with prosthetic valves and intracardiac devices.</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">•</span><p id="par0235" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleSup">18</span>F-FDG PET presents serious limitations regarding native valves and small lesions such as those on pacemaker leads.</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">•</span><p id="par0240" class="elsevierStylePara elsevierViewall">Although echocardiography has high specificity, it presents serious limitations in sensitivity.</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">•</span><p id="par0245" class="elsevierStylePara elsevierViewall">An individualized approach should be adopted in order to select the diagnostic methods that are suitable for each patient's characteristics.</p></li><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">•</span><p id="par0250" class="elsevierStylePara elsevierViewall">SUV<span class="elsevierStyleInf">max</span> is helpful in diagnosing this disease, but there is currently no agreed cut-off point.</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">•</span><p id="par0255" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleSup">18</span>F-FDG PET may be used in the future to monitor response to antibiotic therapy.</p></li></ul></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Conflicts of interest</span><p id="par0260" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:12 [ 0 => array:3 [ "identificador" => "xres1273500" "titulo" => "Abstract" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Materials and Methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec1178151" "titulo" => "Keywords" ] 2 => array:3 [ "identificador" => "xres1273499" "titulo" => "Resumo" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introdução" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Materiais e métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusões" ] ] ] 3 => array:2 [ "identificador" => "xpalclavsec1178150" "titulo" => "Palavras-chave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 5 => array:3 [ "identificador" => "sec0010" "titulo" => "Methods" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "Patient eligibility" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "Imaging protocols" ] 2 => array:2 [ "identificador" => "sec0025" "titulo" => "Image interpretation and final diagnosis" ] 3 => array:2 [ "identificador" => "sec0030" "titulo" => "Statistical analysis" ] ] ] 6 => array:2 [ "identificador" => "sec0035" "titulo" => "Results" ] 7 => array:2 [ "identificador" => "sec0040" "titulo" => "Discussion" ] 8 => array:2 [ "identificador" => "sec0045" "titulo" => "Conclusions" ] 9 => array:2 [ "identificador" => "sec0050" "titulo" => "Key points" ] 10 => array:2 [ "identificador" => "sec0055" "titulo" => "Conflicts of interest" ] 11 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2018-04-11" "fechaAceptado" => "2018-10-21" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1178151" "palabras" => array:4 [ 0 => "Infective endocarditis" 1 => "Positron emission tomography" 2 => "18-Fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose" 3 => "Transesophageal echocardiography" ] ] ] "pt" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palavras-chave" "identificador" => "xpalclavsec1178150" "palabras" => array:3 [ 0 => "Endocardite infecciosa (EI)" 1 => "Tomografia por emissão de pósitrões (18F-FDG-PET)" 2 => "Ecocardiograma transesofágico (ETE)" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">The early diagnosis of infective endocarditis (IE) is a medical challenge and a multidisciplinary approach is essential to improve its frequently fatal prognosis. Our goal was to evaluate the usefulness of [<span class="elsevierStyleSup">18</span>F]2-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography (<span class="elsevierStyleSup">18</span>F-FDG PET) in the diagnosis of this disease.</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Materials and Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">We prospectively assessed 43 patients (five female and 38 male) with clinical suspicion of IE between 2014 and 2017. All patients underwent transesophageal echocardiography (TEE) and an <span class="elsevierStyleSup">18</span>F-FDG PET scan, and the results were compared. A positive PET finding was defined as increased FDG uptake on cardiac valves or intracardiac devices.</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Out of 43 patients with suspected IE, the diagnosis was confirmed in 30 cases (79.7%). <span class="elsevierStyleSup">18</span>F-FDG PET was positive in 24 patients, with 19 showing FDG uptake on cardiac valves (two native and 17 prosthetic) and five on cardiac devices, being concordant with echocardiographic findings in 11 cases. <span class="elsevierStyleSup">18</span>F-FDG PET sensitivity was 80%, specificity 92%, positive predictive value (PPV) 96% and negative predictive value (NPV) 66%. Echocardiography presented sensitivity, specificity, PPV and NPV of 36%, 84%, 84% and 36%, respectively.</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall"><span class="elsevierStyleSup">18</span>F-FDG PET proved to be a sensitive technique with a high diagnostic value in patients with prosthetic valves and intracardiac devices and suspected IE. Its utility decreased dramatically in patients with suspected IE on native valves, in which TEE presented higher sensitivity and thus better diagnostic value.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Introduction" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Materials and Methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] "pt" => array:3 [ "titulo" => "Resumo" "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introdução</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">O diagnóstico precoce de endocardite infecciosa (EI) é um desafio médico. Portanto, uma abordagem multidisciplinar é essencial para melhorar o prognóstico desta patologia, muitas vezes fatal. O nosso objetivo foi avaliar a utilidade da tomografia por emissão de pósitrons [18F] 2-fluoro-2-desoxi-D-glicose (18F-FDG-PET) no diagnóstico desta doença.</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Materiais e métodos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">De forma prospetiva, avaliámos 43 doentes (5 do sexo feminino e 38 do masculino) clinicamente suspeitos de EI entre 2014-2017. Todos os doentes foram submetidos a um ecocardiograma transesofágico (ETE) e uma PET 18F-FDG, os resultados foram posteriormente comparados. Um critério PET positivo foi definido como um aumento na captação de FDG nas válvulas cardíacas ou nos dispositivos intracardíacos.</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Dos 43 doentes com suspeita de EI, o diagnóstico foi confirmado em 30 casos (79,7%). O 18F-FDG-PET foi positivo em 24 doentes, dos quais 19 demonstraram captação de FDG nas válvulas cardíacas (2 nativas e 17 protésicas) e cinco nos dispositivos cardíacos, concordando com os achados ecocardiográficos em 11 casos. A sensibilidade de 18F-FDG-PET (S) foi de 80%, especificidade (P) de 92%, valor preditivo positivo (VPP) de 96% e valor preditivo negativo (VPN) de 66%. A ecocardiografia apresentou valores de S, P, PPV e VPN de 36%, 84%, 84% e 36%, respetivamente.</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusões</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">O 18F-FDG-PET demonstrou ser uma técnica sensível com alto valor diagnóstico em doentes com suspeita de EI com próteses valvulares e dispositivos intracardíacos. A utilidade desta técnica diminui drasticamente em doentes com suspeita de EI nas válvulas nativas, nas quais a ETE apresentou maior sensibilidade e, portanto, melhor valor diagnóstico.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introdução" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Materiais e métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusões" ] ] ] ] "multimedia" => array:6 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1196 "Ancho" => 2508 "Tamanyo" => 163490 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Flowchart of the progress of the patients through the study. <span class="elsevierStyleSup">18</span>F-FDG PET: [<span class="elsevierStyleSup">18</span>F]2-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography; IE: infective endocarditis; TEE: transesophageal echocardiography.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1516 "Ancho" => 2506 "Tamanyo" => 175008 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Diagnostic performance of <span class="elsevierStyleSup">18</span>F-FDG PET and transesophageal echocardiography in the diagnosis of infective endocarditis. <span class="elsevierStyleSup">18</span>F-FDG PET: [<span class="elsevierStyleSup">18</span>F]2-fluoro-2-deoxy-<span class="elsevierStyleSmallCaps">d</span>-glucose positron emission tomography; NPV: negative predictive value; PPV: positive predictive value; TEE: transesophageal echocardiography.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 768 "Ancho" => 1231 "Tamanyo" => 56297 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Reclassification of infective endocarditis (IE) according to the Duke criteria at admission and consensus of our IE unit at the end of follow-up: definite (D), possible (P), and rejected (R). Possible IE cases at admission reduced from 25 cases to 1 case.</p>" ] ] 3 => array:7 [ "identificador" => "fig0020" "etiqueta" => "Figure 4" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr4.jpeg" "Alto" => 565 "Ancho" => 1255 "Tamanyo" => 124159 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Infective endocarditis (IE) in a mechanical aortic valve in a 68-year-old male with a history of Bentall procedure and intermediate suspicion of IE. On transesophageal echocardiography, an aortic pseudoaneurysm was observed in the valvular plane with a diameter of 67 mm×44 mm and with an image of a thrombus inside. On <span class="elsevierStyleSup">18</span>F-FDG PET study, hypermetabolism was observed in the mechanical aortic valve with SUV<span class="elsevierStyleInf">max</span> of 4.49 g/ml.</p>" ] ] 4 => array:7 [ "identificador" => "fig0025" "etiqueta" => "Figure 5" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr5.jpeg" "Alto" => 1363 "Ancho" => 1674 "Tamanyo" => 182606 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Infective endocarditis in a mechanical aortic valve in a 77-year-old male with a mechanical aortic valve, referred after two weeks of fever and back pain. He presented blood cultures positive for <span class="elsevierStyleItalic">Streptococcus bovis</span>. Transesophageal echocardiography and prospective ECG-gated cardiac CT results were negative for endocarditis. <span class="elsevierStyleSup">18</span>F-FDG P ET study revealed hypermetabolism in the aortic valve annulus (SUV<span class="elsevierStyleInf">max</span> 2.8) (A and B) and in the lumbar column at L3-L4 level (SUV<span class="elsevierStyleInf">max</span> 6.3) (C), and radiopharmaceutical uptake is visible in the descending colon at the splenic angle (SUV<span class="elsevierStyleInf">max</span> 7.9) (D). A colonoscopy with biopsy was performed, resulting in the detection of adenocarcinoma of the colon.</p>" ] ] 5 => array:7 [ "identificador" => "fig0030" "etiqueta" => "Figure 6" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr6.jpeg" "Alto" => 1072 "Ancho" => 1674 "Tamanyo" => 153052 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Infective endocarditis in the native mitral valve and bioprosthetic aortic valve in an 88-year-old male hospitalized due to persistent fever and blood cultures positive for <span class="elsevierStyleItalic">Streptococcus viridans</span>. Echocardiographic results show a vegetation on the native mitral valve and no alterations in the bioprosthetic aortic valve. <span class="elsevierStyleSup">18</span>F-FDG PET images show two positive uptake foci, in (A) the native mitral valve (SUV<span class="elsevierStyleInf">max</span> 7.5) and (B–D) the prosthetic aortic valve (SUV<span class="elsevierStyleInf">max</span> 5.1).</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:12 [ 0 => array:3 [ "identificador" => "bib0065" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "18-Fluoro-2-deoxyglucose positron emission tomography-computed tomography: an additional tool in the diagnosis of prosthetic valve endocarditis" "autores" => array:1 [ 0 => array:2 [ "etal" => true "autores" => array:3 [ 0 => "A. Ricciardi" 1 => "P. Sordillo" 2 => "L. 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Ano/Mês | Html | Total | |
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2023 Novembro | 107 | 47 | 154 |
2023 Outubro | 43 | 17 | 60 |
2023 Setembro | 46 | 21 | 67 |
2023 Agosto | 54 | 18 | 72 |
2023 Julho | 42 | 12 | 54 |
2023 Junho | 54 | 20 | 74 |
2023 Maio | 79 | 31 | 110 |
2023 Abril | 39 | 10 | 49 |
2023 Maro | 85 | 26 | 111 |
2023 Fevereiro | 54 | 22 | 76 |
2023 Janeiro | 45 | 13 | 58 |
2022 Dezembro | 64 | 28 | 92 |
2022 Novembro | 85 | 37 | 122 |
2022 Outubro | 91 | 30 | 121 |
2022 Setembro | 61 | 41 | 102 |
2022 Agosto | 59 | 36 | 95 |
2022 Julho | 65 | 42 | 107 |
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2022 Maio | 43 | 46 | 89 |
2022 Abril | 62 | 34 | 96 |
2022 Maro | 65 | 58 | 123 |
2022 Fevereiro | 41 | 45 | 86 |
2022 Janeiro | 52 | 29 | 81 |
2021 Dezembro | 41 | 39 | 80 |
2021 Novembro | 50 | 51 | 101 |
2021 Outubro | 38 | 46 | 84 |
2021 Setembro | 24 | 30 | 54 |
2021 Agosto | 37 | 30 | 67 |
2021 Julho | 27 | 23 | 50 |
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2021 Maio | 52 | 27 | 79 |
2021 Abril | 41 | 29 | 70 |
2021 Maro | 31 | 17 | 48 |
2021 Fevereiro | 49 | 15 | 64 |
2021 Janeiro | 18 | 15 | 33 |
2020 Dezembro | 27 | 5 | 32 |
2020 Novembro | 26 | 16 | 42 |
2020 Outubro | 49 | 16 | 65 |
2020 Setembro | 11 | 7 | 18 |
2020 Agosto | 22 | 11 | 33 |
2020 Julho | 44 | 7 | 51 |
2020 Junho | 22 | 9 | 31 |
2020 Maio | 34 | 5 | 39 |
2020 Abril | 39 | 15 | 54 |
2020 Maro | 57 | 19 | 76 |
2020 Fevereiro | 142 | 23 | 165 |
2020 Janeiro | 78 | 21 | 99 |
2019 Dezembro | 81 | 34 | 115 |
2019 Novembro | 30 | 25 | 55 |