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  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">abc</journal-id>
      <journal-title-group>
        <journal-title>Arquivos Brasileiros de Cardiologia</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Arq. Bras. Cardiol.</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="ppub">0066-782X</issn>
      <issn pub-type="epub">1678-4170</issn>
      <publisher>
        <publisher-name>Sociedade Brasileira de Cardiologia - SBC</publisher-name>
        <publisher-loc>S&#227;o Paulo, SP, Brazil</publisher-loc>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v3">XRLfZ7GSmzKJHLjJBfbRTfv</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2012000100002</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(12)09800102</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X2012000100002</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Editorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>O papel dos Arquivos Brasileiros de Cardiologia em uma nova era da imagem cardiovascular n&#227;o invasiva</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Rochitte</surname>
            <given-names>Carlos E.</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
          <xref ref-type="aff" rid="aff02"/>
        </contrib>
      </contrib-group>
      <aff id="aff01">
        <addr-line>
          <named-content content-type="state">S&#227;o Paulo</named-content>
        </addr-line>
        <institution content-type="orgname">Universidade de S&#227;o Paulo</institution>
        <institution content-type="orgdiv1">Instituto do Cora&#231;&#227;o </institution>
        <country country="BR">Brazil</country>
      </aff>
      <aff id="aff02">
        <addr-line>
          <named-content content-type="city">S&#227;o Paulo</named-content>
          <named-content content-type="state"/>
        </addr-line>
        <institution content-type="orgname">Hospital do Cora&#231;&#227;o</institution>
        <country country="BR">Brazil</country>
      </aff>
      <pub-date date-type="collection" publication-format="electronic">
        <month>01</month>
        <year>2012</year>
      </pub-date>
      <volume>98</volume>
      <issue>1</issue>
      <fpage>3</fpage>
      <lpage>5</lpage>
      <permissions>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/4.0/" xml:lang="en">
          <license-p>This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</license-p>
        </license>
      </permissions>
      <pub-date publication-format="electronic" date-type="pub">
        <day>08</day>
        <month>02</month>
        <year>2012</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>
      <bold>EDITORIAL</bold>
    </p>
    <p>
      <bold>O papel dos Arquivos Brasileiros de Cardiologia em uma nova era da imagem cardiovascular n&#227;o invasiva</bold>
    </p>
    <p>
      <bold>The role of the <italic>Arquivos Brasileiros de Cardiologia</italic> in the new era of non-invasive cardiovascular imaging</bold>
    </p>
    <p>
      <bold>El papel de los Arquivos Brasileiros de Cardiologia en una nueva era de la imagen cardiovascular no invasiva</bold>
    </p>
    <p>
      <bold>Carlos E. Rochitte</bold>
    </p>
    <p>Instituto do Cora&#231;&#227;o - InCor/HCFMUSP; Hospital do Cora&#231;&#227;o - HCOR, S&#227;o Paulo, SP, Brasil</p>
    <p>
      <xref ref-type="corresp" rid="end">Correspond&#234;ncia</xref>
    </p>
    <p><bold>Palavras-chave:</bold> Publica&#231;&#245;es peri&#243;dicas, processamento de imagem assistida por computador/tend&#234;ncias, interpreta&#231;&#227;o de imagem assistida por computador/m&#233;todos.</p>
    <p><bold>Keywords:</bold> Periodicals, image processing, computer-assisted/trends, image interpretation, computer-assisted/methods.</p>
    <p><bold>Palabras clave:</bold> Periodicals, image processing, computer-assisted/trends, image interpretation, computer-assisted/methods.</p>
    <p>Vivemos hoje em plena era da "Renascen&#231;a" em imagem cardiovascular. A imagem cardiovascular n&#227;o invasiva apresentou ao mesmo tempo, solidifica&#231;&#227;o e amadurecimento de modalidades de imagem mais tradicionais e o crescimento exponencial das modalidades mais recentemente introduzidas no armament&#225;rio. A integra&#231;&#227;o dos m&#233;todos de imagem permite tamb&#233;m uma utiliza&#231;&#227;o mais racional e eficaz das modalidades espec&#237;ficas de imagem, favorecendo um diagn&#243;stico mais preciso e com menor custo ou sobreposi&#231;&#227;o e exames. Algoritmos "espertos" para a sele&#231;&#227;o combinada ou n&#227;o dos exames n&#227;o invasivos em cardiologia permitem uma rela&#231;&#227;o custo-efetividade muito melhor para atingir um diagn&#243;stico final, fator crucial hoje para todos os sistemas de sa&#250;de, seja no Brasil, seja no restante do mundo. Um fato nessa dire&#231;&#227;o no Brasil, alinhado com muitos outros pa&#237;ses, foi a cria&#231;&#227;o do Departamento de Imagem Cardiovascular da Sociedade Brasileira de Cardiologia, que integra de forma harm&#244;nica os profissionais das &#225;reas de ecocardiografia, medicina nuclear, resson&#226;ncia magn&#233;tica e tomografia computadorizada cardiovascular. Esse modelo de multimodalidade tem ajudado a progress&#227;o r&#225;pida do conhecimento e o desenvolvimento cont&#237;nuo da &#225;rea. A integra&#231;&#227;o vem sendo proposta j&#225; h&#225; algum tempo com publica&#231;&#245;es seminais descrevendo modelos de integra&#231;&#227;o que possibilitem a melhor efici&#234;ncia<sup>1</sup>. Outro desenrolar dessa verdadeira nova subespecialidade, a imagem cardiovascular, &#233; o lan&#231;amento tanto na Europa como nos Estados Unidos de revistas cient&#237;ficas dedicadas &#224; imagem cardiovascular derivadas das revistas cient&#237;ficas de maior impacto no mundo. Como exemplos temos <italic>Circulation Cardiovascular Imaging</italic>, <italic>JACC Cardiovascular Imaging</italic> e <italic>European Heart Journal Cardiovascular Imaging</italic> (com lan&#231;amento no come&#231;o de 2012). No Brasil, os <italic>Arquivos Brasileiros de Cardiologia</italic>, dentre as revistas nacionais indexadas no Pubmed, t&#234;m publicado significante n&#250;mero de valiosas contribui&#231;&#245;es nacionais e internacionais na &#225;rea de imagem cardiovascular.</p>
    <p>Entre as modalidades mais tradicionais, a ecocardiografia apresentou significante desenvolvimento, com aparecimento de novas t&#233;cnicas, como a ecocardiografia 3D, a t&#233;cnica de doppler tecidual, e mais recentemente, o "<italic>speckle tracking</italic>". Experientes investigadores dessas &#225;reas t&#234;m refinado o uso dessas t&#233;cnicas permitindo diagn&#243;sticos novos e mais precisos e com novos impactos no progn&#243;stico do paciente. Pesquisadores nacionais, com a nossa habitual criatividade, t&#234;m surpreendido com investiga&#231;&#245;es de impacto na &#225;rea e sobre assuntos de grande relev&#226;ncia. De forma original, a deposi&#231;&#227;o de gordura epic&#225;rdica foi investigada pela ecocardiografia<sup>2</sup>. O valor progn&#243;stico da ecocardiografia de estresse com dipiridamol em mulheres foi tamb&#233;m demonstrado em publica&#231;&#227;o nos <italic>ABC</italic><sup>3</sup>. A disfun&#231;&#227;o diast&#243;lica, terreno de indiscut&#237;vel dom&#237;nio da ecocardiografia, foi avaliada em detalhes em pacientes com doen&#231;a renal cr&#244;nica por Barberato e cols.<sup>4</sup>. Na rejei&#231;&#227;o ap&#243;s transplante card&#237;aco, o doppler tecidual mostrou valor<sup>5</sup>. No remodelamento reverso ap&#243;s terapia de ressincroniza&#231;&#227;o, as ecocardiografias bidimensional e tridimensional mostraram-se &#250;teis<sup>6</sup>. Essa pequena amostra de artigos de ponta publicados em<italic>ABC</italic> encontra-se tamb&#233;m alinhada com importantes revistas de ecocardiografia mundial<sup>7,8</sup>.</p>
    <p>A medicina nuclear tamb&#233;m mostrou sua presen&#231;a nos <italic>ABC</italic>. O valor diagn&#243;stico em pacientes com DAC multiarterial foi confirmado no nosso meio<sup>9</sup>. Em artigo com t&#233;cnica inovadora, a isquemia mioc&#225;rdica induzida por estresse mental foi investigada<sup>10</sup>.</p>
    <p>A resson&#226;ncia magn&#233;tica cardiovascular tem sido contemplada com artigos b&#225;sicos no formato como eu fa&#231;o<sup>11</sup>. Esse papel educacional, em especial para as modalidades mais recentes, &#233; de fundamental import&#226;ncia para o cardiologista cl&#237;nico que necessita entender as min&#250;cias dos novos e sofisticados exames, para poder melhor orientar o imagenologista sobre qual deve ser o foco do exame em um paciente espec&#237;fico, e tamb&#233;m melhor interpretar os resultados desses testes. Essas consequ&#234;ncias da educa&#231;&#227;o continuada levam &#224; utiliza&#231;&#227;o mais racional e precisa dos m&#233;todos e melhor custo efetividade da atividade diagn&#243;stica. Por sua vez, a sofistica&#231;&#227;o de t&#233;cnicas de ponta tamb&#233;m se fez presente nos <italic>ABC</italic>. Como exemplo, temos a avalia&#231;&#227;o do metabolismo de fosfatos de alta energia em pacientes com doen&#231;a de Chagas pela espectroscopia do f&#243;sforo 31<sup>12</sup>. Outro exemplo foi a in&#233;dita avalia&#231;&#227;o de fibrose mioc&#225;rdica na cardiomiopatia hipertr&#243;fica no nosso meio, pela t&#233;cnica de realce tardio da resson&#226;ncia magn&#233;tica e a sua correla&#231;&#227;o com risco de morte s&#250;bita<sup>13</sup>. Essa aplica&#231;&#227;o teve paralelos considerados "<italic>landmark papers</italic>" publicados no mesmo ano em<italic>JACC</italic><sup>14,15</sup>.</p>
    <p>A modalidade de tomografia computadorizada cardiovascular apresentou vertiginoso progresso, em particular na tomografia computadorizada das art&#233;rias coronarianas. O escore de c&#225;lcio e a angiografia de coron&#225;rias por tomografia computadorizada tomaram de surpresa a estratifica&#231;&#227;o de risco de pacientes assintom&#225;ticos com risco intermedi&#225;rio para DAC e a avalia&#231;&#227;o n&#227;o invasiva da anatomia das art&#233;rias coron&#225;rias, respectivamente. A angiotomografia de coron&#225;ria se apresentou como instrumento &#250;til seja, na detec&#231;&#227;o de estenose coronariana, seja para a quantifica&#231;&#227;o da carga de placa ateroscler&#243;tica. O escore de c&#225;lcio foi utilizado em pacientes com insufici&#234;ncia renal cr&#244;nica pr&#233;-transplante e demonstrou valor na estratifica&#231;&#227;o de risco como na predi&#231;&#227;o de DAC obstrutiva, que seria detectada pelo cateterismo subsequentemente<sup>16</sup>. Em trabalho tamb&#233;m bastante original e criativo, demonstrou-se que a queda no n&#250;mero de publica&#231;&#245;es da t&#233;cnica de EBCT (electron beam CT) e o aumento da de MDCT (tomografia de m&#250;ltiplas colunas de detectores) revelou com anteced&#234;ncia a substitui&#231;&#227;o de uma tecnologia por outra<sup>17</sup>. Relatos de casos inusitados tamb&#233;m foram descritos pelas novas tecnologias como tomografia de m&#250;ltiplos detectores<sup>18</sup>. De forma pioneira e apontando para o poss&#237;vel futuro da tomografia de coron&#225;rias, foram apresentados casos em que a revasculariza&#231;&#227;o cir&#250;rgica do mioc&#225;rdio foi realizada tendo somente como base a angiotomografia de coron&#225;rias<sup>19</sup>. Esses relatos est&#227;o alinhados com publica&#231;&#227;o tamb&#233;m considerada "<italic>landmark</italic>" no <italic>NEJM</italic>, estudo multic&#234;ntrico com participa&#231;&#227;o importante do Brasil, que al&#233;m de validar a angiotomografia de coron&#225;rias contra o cateterismo invasivo, demonstrou que a predi&#231;&#227;o de revasculariza&#231;&#227;o foi semelhante tanto pela angiotomografia de coron&#225;rias n&#227;o invasiva como pelo cateterismo invasivo<sup>20</sup>.A utiliza&#231;&#227;o de t&#233;cnicas h&#237;bridas tem sido crescente na pr&#225;tica cl&#237;nica e no cen&#225;rio de pesquisa. Inova&#231;&#227;o tecnol&#243;gica de ponta aplicada no Brasil mereceu espa&#231;o nos<italic>ABC</italic>, e utilizou t&#233;cnica de fus&#227;o de imagem do 18-Fl&#250;or- FluorDeoxiGlicose PET (positron emission tomography)e resson&#226;ncia magn&#233;tica na caracteriza&#231;&#227;o de placas ateroscler&#243;ticas<sup>21</sup>. Isso antecipou em dois anos a aquisi&#231;&#227;o de equipamento RM-PET pelo NIH dos Estados Unidos para a realiza&#231;&#227;o desse tipo de imagem h&#237;brida, agora em aquisi&#231;&#227;o realmente simult&#226;nea. No mesmo ano de 2009, publica&#231;&#227;o pioneira na caracteriza&#231;&#227;o de placa ateroscler&#243;tica foi publicada por Motoyama e cols.<sup>22</sup>, no <italic>JACC</italic>. A imagem invasiva tamb&#233;m contribuiu com dados importantes na caracteriza&#231;&#227;o de placa ateroscler&#243;tica. Trabalho revisando a tomografia de coer&#234;ncia &#243;ptica, com impressionantes imagens, foi publicado nos <italic>ABC</italic><sup>23</sup>.</p>
    <p>Outro tema significante nos <italic>ABC</italic> foi a aterosclerose subcl&#237;nica, no quala avalia&#231;&#227;o da fun&#231;&#227;o diast&#243;lica<sup>24</sup> foi profundamente investigada. Temas atuais como s&#237;ndrome metab&#243;lica e gordura visceral tiveram seus manuscritos representantes publicados nos <italic>ABC</italic><sup>25,26</sup>.</p>
    <p>Novamente, os <italic>ABC</italic> se mostraram alinhados com os desenvolvimentos das maiores revistas cient&#237;ficas do mundo na &#225;rea de imagem cardiovascular.</p>
    <p>A integra&#231;&#227;o das imagens permitiu a compara&#231;&#227;o e valida&#231;&#227;o da fra&#231;&#227;o de eje&#231;&#227;o ventricular pela ecocardiografia tridimensional usando a tomografia de m&#250;ltiplos detectores como refer&#234;ncia<sup>27</sup>.</p>
    <p>A integra&#231;&#227;o das modalidades de imagem tem seguido os crit&#233;rios de qualidade em imagem cardiovascular proposto por Pamela Douglas<sup>28,29</sup> e endossada pelo American College of Cardiology. Nesses documentos se estabeleceu tamb&#233;m a estrat&#233;gia para a melhor custo-efetividade dos m&#233;todos diagn&#243;sticos de imagem.</p>
    <p>Adicionalmente &#224; subespecialidade de imagem cardiovascular, outras &#225;reas diagn&#243;sticas de fundamental import&#226;ncia em Cardiologia est&#227;o presentes nos <italic>ABC</italic> com artigos de alta qualidade e impacto. Como exemplo temos o ECG convencional que se redescobre em aplica&#231;&#245;es espec&#237;ficas, como na distrofia muscular de Duchenne<sup>30</sup> ou em novas metodologias com a altern&#226;ncia da onda T<sup>31</sup>. Na ergometria s&#227;o apenas alguns exemplos representativos: a avalia&#231;&#227;o detalhada do BRE<sup>32</sup>, disfun&#231;&#227;o auton&#244;mica no diabetes tipo 1<sup>33</sup>, novo escore eletrocardiogr&#225;fico no precondicionamento isqu&#234;mico<sup>34</sup> e na DAC est&#225;vel<sup>35</sup>, resposta press&#243;rica exagerada ao exerc&#237;cio<sup>36</sup> e valor preditivo da frequ&#234;ncia card&#237;aca na mortalidade<sup>37</sup>.</p>
    <p>Outro m&#233;todo que teve espa&#231;o significativo nas publica&#231;&#245;es recentes dos<italic>ABC</italic> foi a monitoriza&#231;&#227;o ambulatorial da press&#227;o arterial. Alguns exemplos de contribui&#231;&#227;o foram: compara&#231;&#227;o do MAPA com a automedida da PA<sup>38</sup>, avalia&#231;&#227;o da hipertens&#227;o arterial resistente<sup>39</sup> em geral e nas mulheres<sup>40</sup> e no hipotireoidismo subcl&#237;nico<sup>40</sup>.</p>
    <p>Em suma, as publica&#231;&#245;es cient&#237;ficas na &#225;rea de imagem cardiovascular n&#227;o invasiva e diagn&#243;stico cardiovascular s&#227;o abundantes e de alta qualidade no Brasil. Os<italic>ABC</italic> t&#234;m tido papel fundamental em veicular essas informa&#231;&#245;es para o efetor final da cascata de sa&#250;de, o m&#233;dico assistente. Tem tamb&#233;m cumprido seu papel no est&#237;mulo &#224; publica&#231;&#227;o com orienta&#231;&#227;o e treinamento para a melhora da qualidade cient&#237;fica dos nossos "<italic>papers</italic>".</p>
    <p>Somada com os esfor&#231;os em outras &#225;reas do conhecimento cardiol&#243;gico que s&#227;o publicados nos<italic>ABC</italic>, a &#225;rea de imagem cardiovascular tem ajudado a elevar o fator de impacto da revista cient&#237;fica que &#233; a representa&#231;&#227;o da cardiologia brasileira no cen&#225;rio da literatura internacional.</p>
    <p>Em conclus&#227;o, podemos afirmar com seguran&#231;a que os<italic>ABC</italic> est&#227;o alinhados e contribuindo com temas atuais e de grande relev&#226;ncia cl&#237;nica na &#225;rea de imagem cardiovascular, al&#233;m de estar em paralelo cient&#237;fico com as grandes revistas m&#233;dicas de maior impacto mundial nessa subespecialidade.</p>
    <p>
      <fn id="end" fn-type="corresp">
        <label>
          <bold>Correspond&#234;ncia:</bold>
        </label>
        <p> Carlos E. Rochitte </p>
        <p> Av. Dr. En&#233;as de Carvalho Aguiar 44 - Andar AB - Resson&#226;ncia &amp; Tomografia - Cerqueira C&#233;sar </p>
        <p> 05403-000 - S&#227;o Paulo, SP, Brasil </p>
        <p> E-mail: </p>
        <p><email xlink:href="rochitte@cardiol.br">rochitte@cardiol.br</email>, </p>
        <p>
          <email xlink:href="rochitte@incor.usp.br">rochitte@incor.usp.br</email>
        </p>
      </fn>
    </p>
    <p>Artigo recebido em 08/12/11; revisado recebido em 08/12/11; aceito em 08/12/11.</p>
  </body>
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  <sub-article article-type="translation" id="TRen" xml:lang="en">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Editorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">The role of the Arquivos Brasileiros de Cardiologia in the new era of non-invasive cardiovascular imaging</article-title>
      </title-group>
    </front-stub>
    <body>
      <p>
        <bold>EDITORIAL</bold>
      </p>
      <p>
        <fn id="inicio-body2">
          <label>
            <bold>The role of the Arquivos Brasileiros de Cardiologia in the new era of non-invasive cardiovascular imaging</bold>
          </label>
          <p>
            <bold>Carlos E. Rochitte</bold>
          </p>
        </fn>
      </p>
      <p>Instituto do Cora&#231;&#227;o - InCor/HCFMUSP; Hospital do Cora&#231;&#227;o - HCOR, S&#227;o Paulo, SP, Brazil</p>
      <p>Mailing Address</p>
      <p><bold>Keywords:</bold> Periodicals, image processing, computer-assisted/trends, image interpretation, computer-assisted/methods.</p>
      <p>We witness the "Renaissance" of cardiovascular imaging. Non-invasive cardiovascular imaging has concomitantly shown the solidification and maturation of more traditional imaging techniques and the exponential growth of the modalities most recently introduced in the armamentarium. The integration of imaging techniques has also allowed a more rational and effective use of specific imaging methods, favoring a more accurate diagnosis at a lower cost and with less overlap of exams. Smart algorithms for both the combined and non-combined selection of non-invasive exams in cardiology have allowed a much better cost-effectiveness ratio for establishing the final diagnosis, currently a crucial factor for all health care systems in both Brazil and the rest of the world. In Brazil, as in many other countries and following an international trend, the Department of Cardiovascular Imaging of the Brazilian Society of Cardiology has been created. It harmonically integrates professionals of the areas of echocardiography, nuclear medicine, magnetic resonance imaging, and cardiovascular computed tomography. This multimodality approach has helped the rapid progression of knowledge and the continuous development of the area. Integration has been proposed for a while with seminal publications describing models of integration that enable better efficiency<sup>1</sup>. Another development of this truly new subspecialty, cardiovascular imaging, is the launch in both Europe and the United States of scientific journals dedicated to cardiovascular imaging derived from the highest-impact scientific journals in the world, such as the <italic>Circulation Cardiovascular Imaging, JACC Cardiovascular Imaging,</italic> and <italic>European Heart Journal Cardiovascular Imaging</italic> (to be launched at the beginning of 2012). Of the Brazilian journals indexed in Pubmed, the <italic>Arquivos Brasileiros de Cardiologia</italic> has published a significant number of valuable national and international contributions in the area of cardiovascular imaging.</p>
      <p>Of the most traditional modalities, echocardiography has undergone a significant development, with the appearance of new techniques, such as 3D echocardiography, tissue Doppler imaging, and, more recently, speckle tracking echocardiography. Experienced researchers in those areas have refined the use of such techniques allowing new and more accurate diagnoses, with significant impact on the patient's prognosis. Brazilian researchers, with their usual creativity, have surpassed expectations, conducting important research on relevant topics in the area. In an original way, epicardial fat accumulation has been assessed by use of echocardiography<sup>2</sup>. The prognostic value of dipyridamole stress echocardiography in women has also been demonstrated in publications of the <italic>Arquivos Brasileiros de Cardiologia</italic><sup>3</sup>. Diastolic dysfunction, an area in which echocardiography indisputably predominates, has been carefully assessed in patients with chronic renal disease by Barberato et al<sup>4</sup>. For rejection after heart transplantation, tissue Doppler echocardiography has shown its value<sup>5</sup>. In reverse remodeling after resynchronization therapy, two-dimensional and three-dimensional echocardiography has proved useful<sup>6</sup>. That small sample of state-of-the-art articles published in the <italic>Arquivos Brasileiros de Cardiologia</italic> is also aligned with important journals of the world echocardiography<sup>7,8</sup>.</p>
      <p>Nuclear medicine has also been present in <italic>Arquivos Brasileiros de Cardiologia</italic>. Its diagnostic value in patients with multivessel coronary artery disease (CAD) has been confirmed in Brazil<sup>9</sup>. In an article using an innovative technique, mental-stress-induced myocardial ischemia has been assessed<sup>10</sup>.</p>
      <p>Cardiovascular magnetic resonance imaging has also been approached in the "how do I do it?" format<sup>11</sup>. Such educational approach, especially regarding its most recent modalities, is of paramount importance to clinical cardiologists, who need to understand the details of the new and sophisticated exams to better instruct imaging specialist physicians on the focus of the exam in a specific patient, and to better interpret the results of such tests. Continuing education leads to a more rational and accurate use of imaging methods and better cost-effectiveness of the diagnostic activity. In addition, sophisticated state-of-the-art techniques have been considered in the <italic>Arquivos Brasileiros de Cardiologia</italic>. An example is assessing the metabolism of high-energy phosphates in patients with Chagas' disease by use of phosphorus-31 nuclear magnetic resonance spectroscopy<sup>12</sup>. Another example is the unprecedented assessment of myocardial fibrosis in hypertrophic cardiomyopathy in Brazil by use of delayed enhancement magnetic resonance and its correlation with the risk of sudden death<sup>13</sup>. Articles providing an equivalent treatment of the application of that technique, published in the same year in <italic>JACC,</italic> have been considered landmark papers<sup>14,15</sup>.</p>
      <p>The modality of cardiovascular computed tomography, particularly the computed tomography of the coronary arteries, has shown vertiginous progress. Computed tomography calcium score and coronary angiography have taken over the risk stratification of asymptomatic patients at intermediate risk for CAD and the non-invasive assessment of the anatomy of coronary arteries, respectively. Coronary angiotomography has proved to be a useful instrument for both detecting coronary stenosis, and quantifying the calcification of the atherosclerotic plaque. Calcium score has been used for patients with pre-transplantation chronic renal failure and has proved its value in both risk stratification and prediction of obstructive CAD, which would be detected by subsequent catheterization<sup>16</sup>. A very original and creative study has shown that the drop in the number of publications about electron beam computed tomography (EBCT) and the increase in multiple-detector computed tomography (MDCT) have revealed the replacement of one technology by the other<sup>17</sup>. In addition, new cases have been described by use of those new technologies, such as MDCT<sup>18</sup>. In a pioneer way and pointing to the possible future of coronary tomography, cases of coronary artery bypass graft surgery performed based only on coronary angiotomography have been reported<sup>19</sup>. Such reports are aligned with a landmark publication in the <italic>NEJM</italic>, a multicenter study in which Brazil had an important participation. In addition to validating coronary angiotomography against invasive catheterization, that study has reported that the prediction of revascularization was similar by use of both non-invasive coronary angiotomography and invasive catheterization<sup>20</sup>.</p>
      <p>Hybrid techniques have been increasingly used in clinical practice and research. State-of-the-art technological innovation applied in Brazil has earned space in the <italic>Arquivos Brasileiros de Cardiologia</italic>, represented by the imaging fusion technique of F18-fluorodeoxyglucose positron emission tomography (FDG PET) and magnetic resonance imaging to characterize atherosclerotic plaques<sup>21</sup>. This preceded in two years the acquisition of the RM-PET equipment by the NIH of the United States for performing that type of hybrid image, which is currently simultaneously acquired. In that same year of 2009, the pioneer characterization of the atherosclerotic plaque was published by Motoyama et al<sup>22</sup> in the <italic>JACC</italic>. Invasive imaging has also contributed with important data in the characterization of the atherosclerotic plaque. A study reviewing optical coherence tomography, with impressive images, has been published in the <italic>Arquivos Brasileiros de Cardiologia</italic><sup>23</sup>.</p>
      <p>Another relevant topic approached in the <italic>Arquivos Brasileiros de Cardiologia</italic> has been subclinical atherosclerosis, in which diastolic function<sup>24</sup> has been assessed in depth. Current topics, such as metabolic syndrome and visceral fat, have been approached in the <italic>Arquivos Brasileiros de Cardiologia</italic><sup>25,26</sup>.</p>
      <p>Again, the <italic>Arquivos Brasileiros de Cardiologia</italic> have proved to be aligned with the major scientific journals worldwide regarding cardiovascular imaging developments.</p>
      <p>The integration of images has allowed the comparison and validation of ventricular ejection fraction by use of three-dimensional echocardiography, having MDCT as reference<sup>27</sup>.</p>
      <p>The integration of image modalities has followed the quality in cardiovascular imaging criteria proposed by Pamela Douglas<sup>28,29</sup> and supported by the American College of Cardiology. Those documents have also established the strategy for better cost-effectiveness of imaging diagnostic methods.</p>
      <p>In addition to the cardiovascular imaging subespecialty, other diagnostic areas of fundamental importance in Cardiology have been present in the <italic>Arquivos Brasileiros de Cardiologia</italic>, represented by high-quality and impact articles. An example is conventional ECG, which has been rediscovered for specific applications, such as Duchenne's muscular dystrophy<sup>30</sup>, or used in new methodologies with T-wave alternans<sup>31</sup>. Ergometry has some representative examples as follows: detailed assessment of left bundle branch block<sup>32</sup>; autonomic dysfunction in type 1 diabetes<sup>33</sup>; new electrocardiographic score in ischemic preconditioning<sup>34</sup> and stable CAD<sup>35</sup>; exaggerated pressure response to exercise<sup>36</sup>; and heart rate predictive value for mortality<sup>37</sup>.</p>
      <p>Another method that has gained significant space in recent publications of the <italic>Arquivos Brasileiros de Cardiologia</italic> was ambulatory blood pressure monitoring (ABPM). Some examples of contribution were as follows: comparison of ABPM with self-measurement of blood pressure<sup>38</sup>; assessment of resistant arterial hypertension<sup>39</sup> in general and in women<sup>40</sup>; and subclinical hypothyroidism<sup>40</sup>.</p>
      <p>Briefly, scientific publications in the area of non-invasive cardiovascular imaging and cardiovascular diagnosis are abundant and of high quality in Brazil. The <italic>Arquivos Brasileiros de Cardiologia</italic> has a fundamental role in disclosing such information to the final player in health care, the assisting physician. It has also served its purposes regarding stimulus to publication with instructions and training to improve the scientific quality of its papers.</p>
      <p>In addition to efforts in other areas of cardiological knowledge published in the <italic>Arquivos Brasileiros de Cardiologia</italic>, cardiovascular imaging has helped to increase the impact factor of that scientific journal, which represents the Brazilian cardiology in the international literature scenario.</p>
      <p>In conclusion, we can certainly state that the <italic>Arquivos Brasileiros de Cardiologia</italic> are contributing to current topics of great clinical relevance in the area of cardiovascular imaging, in addition to being aligned with the major medical journals of high impact in the subspecialty.</p>
      <p>
        <bold>References</bold>
      </p>
    </body>
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      <title-group>
        <article-title xml:lang="es">El papel de los Arquivos Brasileiros de Cardiologia en una nueva era de la imagen cardiovascular no invasiva</article-title>
      </title-group>
    </front-stub>
    <body>
      <p>
        <bold>EDITORIAL</bold>
      </p>
      <p>
        <fn id="enda-body3">
          <label>
            <bold>El papel de los Arquivos Brasileiros de Cardiologia en una nueva era de la imagen cardiovascular no invasiva</bold>
          </label>
          <p>
            <bold>Carlos E. Rochitte</bold>
          </p>
        </fn>
      </p>
      <p>Instituto do Cora&#231;&#227;o - InCor/HCFMUSP; Hospital do Cora&#231;&#227;o - HCOR, S&#227;o Paulo, SP, Brasil</p>
      <p>Correpondencia</p>
      <p><bold>Palabras clave:</bold> Periodicals, image processing, computer-assisted/trends, image interpretation, computer-assisted/methods.</p>
      <p>Vivimos hoy en plena era del "Renacimiento" en imagen cardiovascular. La imagen cardiovascular no invasiva present&#243; al mismo tiempo, solidificaci&#243;n y maduraci&#243;n de modalidades de imagen m&#225;s tradicionales y el crecimiento exponencial de las modalidades m&#225;s recientemente introducidas en el arsenal terap&#233;utico. La integraci&#243;n de los m&#233;todos de imagen permite tambi&#233;n una utilizaci&#243;n m&#225;s racional y eficaz de las modalidades espec&#237;ficas de imagen, favoreciendo un diagn&#243;stico m&#225;s preciso y con menor costo o sobreposici&#243;n y ex&#225;menes. Algoritmos "expertos" para la selecci&#243;n combinada o no de los ex&#225;menes no invasivos en cardiolog&#237;a permiten una relaci&#243;n costo-efectividad mucho mejor para alcanzar un diagn&#243;stico final, factor crucial hoy para todos los sistemas de salud, ya sea en el Brasil, o en el resto del mundo. Un hecho en esa direcci&#243;n en el Brasil, alineado con muchos otros pa&#237;ses, fue la creaci&#243;n del Departamento de Imagen Cardiovascular de la <italic>Sociedade Brasileira de Cardiologia</italic>, que integra de forma arm&#243;nica a los profesionales de las &#225;reas de ecocardiograf&#237;a, medicina nuclear, resonancia magn&#233;tica y tomograf&#237;a computada cardiovascular. Ese modelo de multimodalidad ha ayudado a la progresi&#243;n r&#225;pida del conocimiento y al desarrollo continuo del &#225;rea. La integraci&#243;n viene siendo propuesta hace ya alg&#250;n tiempo con publicaciones seminales describiendo modelos de integraci&#243;n que posibiliten la mejor eficiencia<sup>1</sup>. Otra manifestaci&#243;n de esa verdadera nueva subespecialidad, la imagen cardiovascular, es el lanzamiento tanto en Europa como en los Estados Unidos de revistas cient&#237;ficas dedicadas a la imagen cardiovascular derivadas de las revistas cient&#237;ficas de mayor impacto en el mundo. Como ejemplos tenemos <italic>Circulation Cardiovascular Imaging</italic>, <italic>JACC Cardiovascular Imaging</italic> y <italic>European Heart Journal Cardiovascular Imaging</italic> (con lanzamiento en el comienzo de 2012). En el Brasil, los <italic>Arquivos Brasileiros de Cardiologia</italic>, entre las revistas nacionales indexadas en el Pubmed, han publicado significativo n&#250;mero de valiosas contribuciones nacionales e internacionales en el &#225;rea de imagen cardiovascular.</p>
      <p>Entre las modalidades m&#225;s tradicionales, la ecocardiograf&#237;a present&#243; significativo desarrollo, con aparici&#243;n de nuevas t&#233;cnicas, como la ecocardiograf&#237;a 3D, la t&#233;cnica de doppler tisular, y m&#225;s recientemente, el "<italic>speckle tracking</italic>". Experimentados investigadores de esas &#225;reas han refinado el uso de esas t&#233;cnicas permitiendo diagn&#243;sticos nuevos y m&#225;s precisos y con nuevos impactos en el pron&#243;stico del paciente. Investigadores nacionales, con nuestra habitual creatividad, han sorprendido con investigaciones de impacto en el &#225;rea y sobre asuntos de gran relevancia. De forma original, el dep&#243;sito de grasa epic&#225;rdica fue investigado por la ecocardiograf&#237;a<sup>2</sup>. El valor pron&#243;stico de la ecocardiograf&#237;a de estr&#233;s con dipiridamol en mujeres fue tambi&#233;n demostrado en publicaci&#243;n en los <italic>ABC</italic><sup>3</sup>. La disfunci&#243;n diast&#243;lica, terreno de indiscutible dominio de la ecocardiograf&#237;a, fue evaluada en detalles en pacientes con enfermedad renal cr&#243;nica por Barberato et al<sup>4</sup>. En el rechazo despu&#233;s de transplante card&#237;aco, el doppler tisular mostr&#243; valor<sup>5</sup>. En el remodelado reverso despu&#233;s de terapia de resincronizaci&#243;n, las ecocardiograf&#237;as bidimensional y tridimensional se mostraron &#250;tiles<sup>6</sup>. Esa peque&#241;a muestra de art&#237;culos de punta publicados en <italic>ABC</italic> se encuentra tambi&#233;n alineada con importantes revistas de ecocardiograf&#237;a mundial<sup>7,8</sup>.</p>
      <p>La medicina nuclear tambi&#233;n mostr&#243; su presencia en los <italic>ABC</italic>. El valor diagn&#243;stico en pacientes con EAC multiarterial fue confirmado en nuestro medio<sup>9</sup>. En art&#237;culo con t&#233;cnica innovadora, la isquemia mioc&#225;rdica inducida por estr&#233;s mental fue investigada<sup>10</sup>.</p>
      <p>La resonancia magn&#233;tica cardiovascular ha sido contemplada con art&#237;culos b&#225;sicos en el formato como lo hago<sup>11</sup>. Ese papel educativo, en especial para las modalidades m&#225;s recientes, es de fundamental importancia para el cardi&#243;logo cl&#237;nico que necesita entender los detalles de los nuevos y sofisticados ex&#225;menes, para poder orientar mejor al especialista en im&#225;genes sobre cual debe ser el foco del examen en un paciente espec&#237;fico, y tambi&#233;n interpretar mejor los resultados de esos tests. Esas consecuencias de la educaci&#243;n continuada llevan a la utilizaci&#243;n m&#225;s racional y precisa de los m&#233;todos y a mejor costo-efectividad de la actividad diagn&#243;stica. A su vez, la sofisticaci&#243;n de t&#233;cnicas de punta tambi&#233;n se hizo presente en los <italic>ABC</italic>. Como ejemplo, tenemos la evaluaci&#243;n del metabolismo de fosfatos de alta energ&#237;a en pacientes con enfermedad de Chagas por la espectroscop&#237;a del f&#243;sforo 31<sup>12</sup>. Otro ejemplo fue la in&#233;dita evaluaci&#243;n de fibrosis mioc&#225;rdica en la cardiomiopat&#237;a hipertr&#243;fica en nuestro medio, por la t&#233;cnica de realce tard&#237;o de la resonancia magn&#233;tica y su correlaci&#243;n con riesgo de muerte s&#250;bita<sup>13</sup>. Esa aplicaci&#243;n tuvo paralelos considerados "<italic>landmark papers</italic>" publicados en el mismo a&#241;o en <italic>JACC</italic><sup>14,15</sup>.</p>
      <p>La modalidad de tomograf&#237;a computada cardiovascular present&#243; vertiginoso progreso, en particular en la tomograf&#237;a computada de las arterias coronarias. El escore de calcio y la angiograf&#237;a de coronarias por tomograf&#237;a computada tomaron de sorpresa la estratificaci&#243;n de riesgo de pacientes asintom&#225;ticos con riesgo intermedio para EAC y la evaluaci&#243;n no invasiva de la anatom&#237;a de las arterias coronarias, respectivamente. La angiotomograf&#237;a de coronaria se present&#243; como instrumento &#250;til, ya sea en la detecci&#243;n de estenosis coronaria, o para la cuantificaci&#243;n de la carga de placa ateroscler&#243;tica. El escore de calcio fue utilizado en pacientes con insuficiencia renal cr&#243;nica pre-transplante y demostr&#243; valor en la estratificaci&#243;n de riesgo como en la predicci&#243;n de EAC obstructiva, que ser&#237;a detectada por el cateterismo subsecuentemente<sup>16</sup>. En trabajo tambi&#233;n bastante original y creativo, se demostr&#243; que la ca&#237;da en el n&#250;mero de publicaciones de la t&#233;cnica de EBCT (electron beam CT) y el aumento de la de MDCT (tomograf&#237;a de m&#250;ltiples columnas de detectores) revel&#243; con antecedencia la sustituci&#243;n de una tecnolog&#237;a por otra<sup>17</sup>. Relatos de casos inusitados tambi&#233;n fueron descriptos por las nuevas tecnolog&#237;as como tomograf&#237;a de m&#250;ltiples detectores<sup>18</sup>. De forma pionera y apuntando al posible futuro de la tomograf&#237;a de coronarias, fueron presentados casos en que la revascularizaci&#243;n quir&#250;rgica del miocardio fue realizada teniendo solamente como base la angiotomograf&#237;a de coronarias<sup>19</sup>. Esos relatos est&#225;n alineados con publicaci&#243;n tambi&#233;n considerada "<italic>landmark</italic>" en el <italic>NEJM</italic>, estudio multic&#233;ntrico con participaci&#243;n importante del Brasil, que adem&#225;s de validar la angiotomograf&#237;a de coronarias contra el cateterismo invasivo, demostr&#243; que la predicci&#243;n de revascularizaci&#243;n fue semejante tanto por la angiotomograf&#237;a de coronarias no invasiva como por el cateterismo invasivo<sup>20</sup>.La utilizaci&#243;n de t&#233;cnicas h&#237;bridas ha sido creciente en la pr&#225;ctica cl&#237;nica y en el escenario de investigaci&#243;n. Innovaci&#243;n tecnol&#243;gica de punta aplicada en el Brasil mereci&#243; espacio en los <italic>ABC</italic>, y utiliz&#243; t&#233;cnica de fusi&#243;n de imagen del 18-Fl&#250;or- FluorDeoxiGlicose PET (positron emission tomography) y resonancia magn&#233;tica en la caracterizaci&#243;n de placas ateroscler&#243;ticas<sup>21</sup>. Eso anticip&#243; en dos a&#241;os la adquisici&#243;n de equipamiento RM-PET pelo NIH de los Estados Unidos para la realizaci&#243;n de ese tipo de imagen h&#237;brida, ahora en adquisici&#243;n realmente simult&#225;nea. En el mismo a&#241;o 2009, publicaci&#243;n pionera en la caracterizaci&#243;n de placa ateroscler&#243;tica fue publicada por Motoyama et al<sup>22</sup>, en el <italic>JACC</italic>. La imagen invasiva tambi&#233;n contribuy&#243; con datos importantes en la caracterizaci&#243;n de placa ateroscler&#243;tica. Trabajo revisando la tomograf&#237;a de coherencia &#243;ptica, con impresionantes im&#225;genes, fue publicado en los <italic>ABC</italic><sup>23</sup>.</p>
      <p>Otro tema significativo en los <italic>ABC</italic> fue la aterosclerosis subcl&#237;nica, en el cual la evaluaci&#243;n de la funci&#243;n diast&#243;lica<sup>24</sup> fue profundamente investigada. Temas actuales como s&#237;ndrome metab&#243;lico y grasa visceral tuvieron sus manuscritos representantes publicados en los <italic>ABC</italic><sup>25,26</sup>.</p>
      <p>Nuevamente, los <italic>ABC</italic> se mostraron alineados con los desarrollos de las mayores revistas cient&#237;ficas del mundo en el &#225;rea de imagen cardiovascular.</p>
      <p>La integraci&#243;n de las im&#225;genes permiti&#243; la comparaci&#243;n y validaci&#243;n de la fracci&#243;n de eyecci&#243;n ventricular por la ecocardiograf&#237;a tridimensional usando la tomograf&#237;a de m&#250;ltiples detectores como referencia<sup>27</sup>.</p>
      <p>La integraci&#243;n de las modalidades de imagen ha seguido los criterios de calidad en imagen cardiovascular propuesto por Pamela Douglas<sup>28,29</sup> y endosada por el American College of Cardiology. En esos documentos se estableci&#243; tambi&#233;n la estrategia para el mejor costo-efectividad de los m&#233;todos diagn&#243;sticos de imagen.</p>
      <p>Adicionalmente a la subespecialidad de imagen cardiovascular, otras &#225;reas diagn&#243;sticas de fundamental importancia en Cardiolog&#237;a est&#225;n presentes en los <italic>ABC</italic> con art&#237;culos de alta calidad e impacto. Como ejemplo tenemos el ECG convencional que se redescubre en aplicaciones espec&#237;ficas, como en la distrofia muscular de Duchenne<sup>30</sup> o en nuevas metodolog&#237;as con la alternancia de la onda T<sup>31</sup>. En la ergometr&#237;a son apenas algunos ejemplos representativos: la evaluaci&#243;n detallada del BRI<sup>32</sup>, disfunci&#243;n auton&#243;mica en la diabetes tipo 1<sup>33</sup>, nuevo escore electrocardiogr&#225;fico en el preacondicionamiento isqu&#233;mico<sup>34</sup> y en la EAC estable<sup>35</sup>, respuesta pres&#243;rica exagerada al ejercicio<sup>36</sup> y valor predictivo de la frecuencia card&#237;aca en la mortalidad<sup>37</sup>.</p>
      <p>Otro m&#233;todo que tuvo espacio significativo en las publicaciones recientes de los <italic>ABC</italic> fue el monitoreo ambulatorio de la presi&#243;n arterial. Algunos ejemplos de contribuci&#243;n fueron: comparaci&#243;n del MAPA con la automedida de la PA<sup>38</sup>, evaluaci&#243;n de la hipertensi&#243;n arterial resistente<sup>39</sup> en general y en las mujeres<sup>40</sup> y en el hipotiroidismo subcl&#237;nico<sup>40</sup>.</p>
      <p>En suma, las publicaciones cient&#237;ficas en el &#225;rea de imagen cardiovascular no invasiva y diagn&#243;stico cardiovascular son abundantes y de alta calidad en el Brasil. Los <italic>ABC</italic> han tenido un papel fundamental en vehicular esas informaciones para el efector final de la cascada de salud, el m&#233;dico asistente. Han cumplido tambi&#233;n su papel en el est&#237;mulo a la publicaci&#243;n con orientaci&#243;n y entrenamiento para la mejora de la calidad cient&#237;fica de nuestros "<italic>papers</italic>".</p>
      <p>Sumada a los esfuerzos en otras &#225;reas del conocimiento cardiol&#243;gico que son publicados en los <italic>ABC</italic>, el &#225;rea de imagen cardiovascular ha ayudado a elevar el factor de impacto de la revista cient&#237;fica que es la representaci&#243;n de la cardiolog&#237;a brasile&#241;a en el escenario de la literatura internacional.</p>
      <p>En conclusi&#243;n, podemos afirmar con seguridad que los <italic>ABC</italic> est&#225;n alineados y contribuyendo con temas actuales y de gran relevancia cl&#237;nica en el &#225;rea de imagen cardiovascular, adem&#225;s de estar en paralelo cient&#237;fico con las grandes revistas m&#233;dicas de mayor impacto mundial en esa subespecialidad.</p>
      <p>
        <bold>Referencias</bold>
      </p>
      <p>1. Fraser AG, Buser PT, Bax JJ, Dassen WR, Nihoyannopoulos P, Schwitter J, et al. The future of cardiovascular imaging and non-invasive diagnosis: A joint statement from the european association of echocardiography, the working groups on cardiovascular magnetic resonance, computers in cardiology, and nuclear cardiology, of the european society of cardiology, the european association of nuclear medicine, and the association for european paediatric cardiology. Eur Heart J. 2006;27(14):1750-3.</p>
      <p>2. Mustelier JV, Rego JO, Gonzalez AG, Sarmiento JC, Riveron BV. Echocardiographic parameters of epicardial fat deposition and its relation to coronary artery disease. Arq Bras Cardiol. 2011;97(2):122-9.</p>
      <p>3. Almeida MC, Markman Filho B. Prognostic value of dipyridamole stress echocardiography in women. Arq Bras Cardiol. 2011;96(1):31-7.</p>
      <p>4. Barberato SH, Bucharles SG, Sousa AM, Costantini CO, Costantini CR, Pecoits-Filho R. [Prevalence and prognostic impact of diastolic dysfunction in patients with chronic kidney disease on hemodialysis]. Arq Bras Cardiol. 2010;94(4):457-62.</p>
      <p>5. Resende MV, Vieira ML, Bacal F, Andrade JL, Stolf NA, Bocchi EA. Tissue doppler echocardiography in the diagnosis of heart transplantation rejection. Arq Bras Cardiol. 2011;97(1):8-16.</p>
      <p>6. Hotta VT, Martinelli Filho M, Mady C, Mathias W Jr, Vieira ML. Comparison between 2D and 3D echocardiography in the evaluation of reverse remodeling after CRT. Arq Bras Cardiol. 2011;97(2):111-21.</p>
      <p>7. Tsang W, Weinert L, Sugeng L, Chandra S, Ahmad H, Spencer K, et al. The value of three-dimensional echocardiography derived mitral valve parametric maps and the role of experience in the diagnosis of pathology. J Am Soc Echocardiogr. 2011;24(8):860-7.</p>
      <p>8. Sengul C, Cevik C, Ozveren O, Oduncu V, Sunbul A, Akgun T, et al. Echocardiographic epicardial fat thickness is associated with carotid intima-media thickness in patients with metabolic syndrome. Echocardiography. 2011;28(8):853-8.</p>
      <p>9. de Siqueira ME, Neto EM, Kelendjian JF, Smanio PE. Diagnostic value of myocardial radionuclide imaging in patients with multivessel coronary disease. Arq Bras Cardiol. 2011;97(3):194-8.</p>
      <p>10. Barbirato GB, Felix R, de Azevedo JC, Corr&#234;a PL, de N&#243;brega AC, Coimbra A, et al. Prevalence of induced ischemia by mental distress. Arq Bras Cardiol. 2010;94(3):301-7.</p>
      <p>11. Nacif MS, Oliveira Junior AC, Carvalho AC, Rochitte CE. Cardiac magnetic resonance and its anatomical planes: how do i do it? Arq Bras Cardiol. 2010;95(6):756-63.</p>
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      <p>13. Shiozaki AA, Senra T, Arteaga E, Pita CG, Martinelli Filho M, Avila LF, et al. Myocardial fibrosis in patients with hypertrophic cardiomyopathy and high risk for sudden death. Arq Bras Cardiol. 2010;94(4):535-40.</p>
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