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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="tb0005"></elsevierMultimedia></p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Abstract</span><p id="par0015" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Background&#58;</span> Atrial fibrillation &#40;AF&#41; is a leading cause of total and fatal ischemic stroke&#46; Stroke risk after AF ablation appears to be favorably affected&#59; however&#44; it is largely unknown whether the benefit extends to all stroke CHADS2 risk profiles of AF patients&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Objective&#58;</span> To determine if ablation of atrial fibrillation reduces stroke rates in all risk groups&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Methods&#58;</span> A total of 4212 consecutive patients who underwent AF ablation were compared &#40;1&#58;4&#41; with 16&#44;848 age&#8208;&#47;sex&#8208;matched controls with AF &#40;no ablation&#41; and to 16&#44;848 age&#8208;&#47;sex&#8208;matched controls without AF&#46; Patients were enrolled from the large ongoing prospective Intermountain Atrial Fibrillation Study and were followed for at least 3 years&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Results&#58;</span> Of the 37&#44;908 patients&#44; the mean age was 65&#46;0<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>13 years and 4&#46;4&#37; &#40;no AF&#41;&#44; 6&#46;3&#37; &#40;AF&#44; no ablation&#41;&#44; and 4&#46;5&#37; &#40;AF ablation&#41; patients had a prior stroke &#40;<span class="elsevierStyleItalic">p</span> &#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; The profile of CHADS2 scores between comparative groups was similar&#58; 0&#8211;1 &#40;69&#46;3&#37;&#44; no AF&#59; 62&#46;3&#37;&#44; AF&#44; no ablation&#59; 63&#46;6&#37;&#44; AF ablation&#41;&#44; 2&#8211;3 &#40;26&#46;5&#37;&#44; no AF&#59; 29&#46;7&#37;&#44; AF&#44; no ablation&#59; 28&#46;7&#37;&#44; AF ablation&#41;&#44; and &#8805;<span class="elsevierStyleHsp" style=""></span>4 &#40;4&#46;3&#37;&#44; no AF&#59; 8&#46;0&#37;&#44; AF&#44; no ablation&#59; 7&#46;7&#37;&#44; AF ablation&#41;&#46; A total of 1296 &#40;3&#46;4&#37;&#41; patients had a stroke over the follow&#8208;up period&#46; Across all CHADS2 profiles and ages&#44; AF patients with ablation had a lower long&#8208;term risk of stroke compared to patients without ablation&#46; Furthermore&#44; AF ablation patients had similar long&#8208;term risks of stroke across all CHADS2 profiles and ages compared to patients with no history of AF&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Conclusions&#58;</span> In our study populations&#44; AF ablation patients have a significantly lower risk of stroke compared to AF patients who do not undergo ablation independent of baseline stroke risk score&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Coment&#225;rio</span><p id="par0040" class="elsevierStylePara elsevierViewall">A fibrilha&#231;&#227;o auricular &#233; a arritmia mais frequente na pr&#225;tica cl&#237;nica<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a>&#46; Est&#225; associada a aumento de mortalidade&#44; acidente vascular cerebral&#44; insufici&#234;ncia card&#237;aca e hospitaliza&#231;&#245;es<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">A abla&#231;&#227;o de fibrilha&#231;&#227;o auricular &#40;sobretudo de formas parox&#237;sticas&#41; &#233; atualmente terap&#234;utica de primeira linha&#46; Provou em ensaios cl&#237;nicos ser eficaz na redu&#231;&#227;o de eventos arr&#237;tmicos no seguimento&#44; assim como na melhoria da qualidade de vida&#44; quando comparada com terap&#234;utica antiarr&#237;tmica farmacol&#243;gica<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">O artigo selecionado<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> descreve um grande estudo populacional que compara 4212 doentes submetidos a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular com dois grupos controlo&#58; doentes com fibrilha&#231;&#227;o auricular n&#227;o submetidos a abla&#231;&#227;o &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>16&#46;848&#41; e doentes da mesma idade e sexo que nunca tiveram fibrilha&#231;&#227;o auricular &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>16&#46;848&#41;&#46; Os doentes foram selecionados consecutivamente num registo inter&#8208;hospitalar &#40;<span class="elsevierStyleItalic">Intermountain Atrial Fibrillation Study Registry&#44; Utah</span>&#41; desde que tivessem um seguimento m&#237;nimo de tr&#234;s anos&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Os resultados demonstram que&#44; na popula&#231;&#227;o estudada&#44; a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular diminui o risco de acidente vascular cerebral e que as taxas s&#227;o semelhantes &#224;s de popula&#231;&#245;es de doentes com a mesma idade e sexo que nunca tiveram fibrilha&#231;&#227;o auricular&#46; Os autores do estudo demonstram ainda que esta redu&#231;&#227;o de acidente vascular cerebral &#233; consistente em todos os grupos et&#225;rios estudados&#44; assim como para todos os valores do <span class="elsevierStyleItalic">score</span> de risco tromboemb&#243;lico CHADS2&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">As limita&#231;&#245;es principais deste estudo prendem&#8208;se com a metodologia utilizada&#46; Se&#44; por um lado&#44; a utiliza&#231;&#227;o de dados de um registo inter&#8208;hospitalar permite ter uma popula&#231;&#227;o muito grande &#40;37908 doentes&#41;&#44; por outro&#44; a n&#227;o aleatoriza&#231;&#227;o dos grupos de tratamento levanta algumas quest&#245;es&#46; Assim&#44; &#233; dif&#237;cil de garantir que os doentes submetidos a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular seriam semelhantes aos doentes em que se optou por n&#227;o fazer abla&#231;&#227;o&#46; A estratifica&#231;&#227;o por grupos de risco tromboemb&#243;lico &#40;CHADS2&#41; diminui&#44; mas n&#227;o anula completamente esta limita&#231;&#227;o&#46; Outra cr&#237;tica poss&#237;vel &#233; a aus&#234;ncia de informa&#231;&#227;o sobre os regimes de anticoagula&#231;&#227;o dos dois grupos de tratamento&#44; embora os autores afirmem que nas institui&#231;&#245;es em quest&#227;o &#233; pr&#225;tica habitual a anticoagula&#231;&#227;o oral se CHADS2 &#62;<span class="elsevierStyleHsp" style=""></span>2&#44; independentemente da estrat&#233;gia de tratamento&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Trata&#8208;se assim de um estudo importante que sugere&#44; pela primeira vez&#44; num n&#250;mero muito elevado de doentes&#44; que a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular tem o potencial para diminuir o risco de acidente vascular cerebral&#44; independentemente do risco tromboemb&#243;lico de base&#46; &#201; importante agora que estes resultados possam ser confirmados em ensaios cl&#237;nicos aleatorizados de compara&#231;&#227;o entre abla&#231;&#227;o e as restantes estrat&#233;gias de controlo do ritmo ou de frequ&#234;ncia em doentes com fibrilha&#231;&#227;o auricular&#46; O ensaio cl&#237;nico CABANA<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> &#40;que se encontra atualmente a recrutar doentes&#41; pretende comparar uma estrat&#233;gia de abla&#231;&#227;o de fibrilha&#231;&#227;o auricular com a de terap&#234;utica antiarr&#237;tmica em doentes com fibrilha&#231;&#227;o auricular&#46; Trata&#8208;se de um ensaio cl&#237;nico grande &#40;inclus&#227;o de 2200 doentes&#41; aleatorizado com o objetivo prim&#225;rio de demonstrar redu&#231;&#227;o na incid&#234;ncia de mortalidade&#44; acidente vascular cerebral&#44; hemorragia grave e paragem card&#237;aca&#46; Teremos que aguardar pela publica&#231;&#227;o dos resultados deste estudo para uma resposta definitiva a esta quest&#227;o&#46;</p></span></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Cavaco D&#46; Comment on &#8220;Atrial fibrillation ablation patients have long&#8208;term stroke rates similar to patients without atrial fibrillation regardless of CHADS2 score&#8221; 2014&#46; Rev Port Cardiol&#46; 2014&#59;33&#58;581&#8211;582&#46;</p>"
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Comentário a «Doentes submetidos a ablação de fibrilhação auricular têm o mesmo risco de AVC a longo prazo que doentes sem fibrilhação auricular, independentemente do score CHADS2»
Comment on “Atrial fibrillation ablation patients have long‐term stroke rates similar to patients without atrial fibrillation regardless of CHADS2 score”
Diogo Cavaco
Membro do Corpo Redatorial da Revista Portuguesa de Cardiologia
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall"><elsevierMultimedia ident="tb0005"></elsevierMultimedia></p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Abstract</span><p id="par0015" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Background&#58;</span> Atrial fibrillation &#40;AF&#41; is a leading cause of total and fatal ischemic stroke&#46; Stroke risk after AF ablation appears to be favorably affected&#59; however&#44; it is largely unknown whether the benefit extends to all stroke CHADS2 risk profiles of AF patients&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Objective&#58;</span> To determine if ablation of atrial fibrillation reduces stroke rates in all risk groups&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Methods&#58;</span> A total of 4212 consecutive patients who underwent AF ablation were compared &#40;1&#58;4&#41; with 16&#44;848 age&#8208;&#47;sex&#8208;matched controls with AF &#40;no ablation&#41; and to 16&#44;848 age&#8208;&#47;sex&#8208;matched controls without AF&#46; Patients were enrolled from the large ongoing prospective Intermountain Atrial Fibrillation Study and were followed for at least 3 years&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Results&#58;</span> Of the 37&#44;908 patients&#44; the mean age was 65&#46;0<span class="elsevierStyleHsp" style=""></span>&#177;<span class="elsevierStyleHsp" style=""></span>13 years and 4&#46;4&#37; &#40;no AF&#41;&#44; 6&#46;3&#37; &#40;AF&#44; no ablation&#41;&#44; and 4&#46;5&#37; &#40;AF ablation&#41; patients had a prior stroke &#40;<span class="elsevierStyleItalic">p</span> &#60;<span class="elsevierStyleHsp" style=""></span>&#46;0001&#41;&#46; The profile of CHADS2 scores between comparative groups was similar&#58; 0&#8211;1 &#40;69&#46;3&#37;&#44; no AF&#59; 62&#46;3&#37;&#44; AF&#44; no ablation&#59; 63&#46;6&#37;&#44; AF ablation&#41;&#44; 2&#8211;3 &#40;26&#46;5&#37;&#44; no AF&#59; 29&#46;7&#37;&#44; AF&#44; no ablation&#59; 28&#46;7&#37;&#44; AF ablation&#41;&#44; and &#8805;<span class="elsevierStyleHsp" style=""></span>4 &#40;4&#46;3&#37;&#44; no AF&#59; 8&#46;0&#37;&#44; AF&#44; no ablation&#59; 7&#46;7&#37;&#44; AF ablation&#41;&#46; A total of 1296 &#40;3&#46;4&#37;&#41; patients had a stroke over the follow&#8208;up period&#46; Across all CHADS2 profiles and ages&#44; AF patients with ablation had a lower long&#8208;term risk of stroke compared to patients without ablation&#46; Furthermore&#44; AF ablation patients had similar long&#8208;term risks of stroke across all CHADS2 profiles and ages compared to patients with no history of AF&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleBold">Conclusions&#58;</span> In our study populations&#44; AF ablation patients have a significantly lower risk of stroke compared to AF patients who do not undergo ablation independent of baseline stroke risk score&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Coment&#225;rio</span><p id="par0040" class="elsevierStylePara elsevierViewall">A fibrilha&#231;&#227;o auricular &#233; a arritmia mais frequente na pr&#225;tica cl&#237;nica<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a>&#46; Est&#225; associada a aumento de mortalidade&#44; acidente vascular cerebral&#44; insufici&#234;ncia card&#237;aca e hospitaliza&#231;&#245;es<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">A abla&#231;&#227;o de fibrilha&#231;&#227;o auricular &#40;sobretudo de formas parox&#237;sticas&#41; &#233; atualmente terap&#234;utica de primeira linha&#46; Provou em ensaios cl&#237;nicos ser eficaz na redu&#231;&#227;o de eventos arr&#237;tmicos no seguimento&#44; assim como na melhoria da qualidade de vida&#44; quando comparada com terap&#234;utica antiarr&#237;tmica farmacol&#243;gica<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">O artigo selecionado<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> descreve um grande estudo populacional que compara 4212 doentes submetidos a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular com dois grupos controlo&#58; doentes com fibrilha&#231;&#227;o auricular n&#227;o submetidos a abla&#231;&#227;o &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>16&#46;848&#41; e doentes da mesma idade e sexo que nunca tiveram fibrilha&#231;&#227;o auricular &#40;n<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>16&#46;848&#41;&#46; Os doentes foram selecionados consecutivamente num registo inter&#8208;hospitalar &#40;<span class="elsevierStyleItalic">Intermountain Atrial Fibrillation Study Registry&#44; Utah</span>&#41; desde que tivessem um seguimento m&#237;nimo de tr&#234;s anos&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">Os resultados demonstram que&#44; na popula&#231;&#227;o estudada&#44; a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular diminui o risco de acidente vascular cerebral e que as taxas s&#227;o semelhantes &#224;s de popula&#231;&#245;es de doentes com a mesma idade e sexo que nunca tiveram fibrilha&#231;&#227;o auricular&#46; Os autores do estudo demonstram ainda que esta redu&#231;&#227;o de acidente vascular cerebral &#233; consistente em todos os grupos et&#225;rios estudados&#44; assim como para todos os valores do <span class="elsevierStyleItalic">score</span> de risco tromboemb&#243;lico CHADS2&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">As limita&#231;&#245;es principais deste estudo prendem&#8208;se com a metodologia utilizada&#46; Se&#44; por um lado&#44; a utiliza&#231;&#227;o de dados de um registo inter&#8208;hospitalar permite ter uma popula&#231;&#227;o muito grande &#40;37908 doentes&#41;&#44; por outro&#44; a n&#227;o aleatoriza&#231;&#227;o dos grupos de tratamento levanta algumas quest&#245;es&#46; Assim&#44; &#233; dif&#237;cil de garantir que os doentes submetidos a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular seriam semelhantes aos doentes em que se optou por n&#227;o fazer abla&#231;&#227;o&#46; A estratifica&#231;&#227;o por grupos de risco tromboemb&#243;lico &#40;CHADS2&#41; diminui&#44; mas n&#227;o anula completamente esta limita&#231;&#227;o&#46; Outra cr&#237;tica poss&#237;vel &#233; a aus&#234;ncia de informa&#231;&#227;o sobre os regimes de anticoagula&#231;&#227;o dos dois grupos de tratamento&#44; embora os autores afirmem que nas institui&#231;&#245;es em quest&#227;o &#233; pr&#225;tica habitual a anticoagula&#231;&#227;o oral se CHADS2 &#62;<span class="elsevierStyleHsp" style=""></span>2&#44; independentemente da estrat&#233;gia de tratamento&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Trata&#8208;se assim de um estudo importante que sugere&#44; pela primeira vez&#44; num n&#250;mero muito elevado de doentes&#44; que a abla&#231;&#227;o de fibrilha&#231;&#227;o auricular tem o potencial para diminuir o risco de acidente vascular cerebral&#44; independentemente do risco tromboemb&#243;lico de base&#46; &#201; importante agora que estes resultados possam ser confirmados em ensaios cl&#237;nicos aleatorizados de compara&#231;&#227;o entre abla&#231;&#227;o e as restantes estrat&#233;gias de controlo do ritmo ou de frequ&#234;ncia em doentes com fibrilha&#231;&#227;o auricular&#46; O ensaio cl&#237;nico CABANA<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> &#40;que se encontra atualmente a recrutar doentes&#41; pretende comparar uma estrat&#233;gia de abla&#231;&#227;o de fibrilha&#231;&#227;o auricular com a de terap&#234;utica antiarr&#237;tmica em doentes com fibrilha&#231;&#227;o auricular&#46; Trata&#8208;se de um ensaio cl&#237;nico grande &#40;inclus&#227;o de 2200 doentes&#41; aleatorizado com o objetivo prim&#225;rio de demonstrar redu&#231;&#227;o na incid&#234;ncia de mortalidade&#44; acidente vascular cerebral&#44; hemorragia grave e paragem card&#237;aca&#46; Teremos que aguardar pela publica&#231;&#227;o dos resultados deste estudo para uma resposta definitiva a esta quest&#227;o&#46;</p></span></span>"
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Article information
ISSN: 21742049
Original language: Portuguese
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Revista Portuguesa de Cardiologia (English edition)
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