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  <front>
    <journal-meta>
      <journal-id journal-id-type="nlm-ta">Arq Bras Cardiol</journal-id>
      <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>
    </journal-meta>
    <article-meta>
      <article-id specific-use="scielo-v3" pub-id-type="publisher-id">F3ftcsrV8MZD8k6yShr5zdp</article-id>
      <article-id specific-use="scielo-v2" pub-id-type="publisher-id">S0066-782X2022000501000</article-id>
      <article-id pub-id-type="publisher-id">abc.20210819</article-id>
      <article-id pub-id-type="doi">10.36660/abc.20210819</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Imagem</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Art&#233;ria Coron&#225;ria Direita Intracavit&#225;ria: Um Achado Incidental com Potenciais Implica&#231;&#245;es para Procedimentos Card&#237;acos Invasivos</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0003-1739-4096</contrib-id>
          <name>
            <surname>Borges</surname>
            <given-names>Sara Cristina da Silva</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Carvalho</surname>
            <given-names>Catarina Isabel Ribeiro</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Gon&#231;alves</surname>
            <given-names>Miguel Eduardo Teixeira Moz</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Baptista</surname>
            <given-names>Ana Isabel Santos</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0002-2386-9337</contrib-id>
          <name>
            <surname>Moreira</surname>
            <given-names>Jos&#233; Il&#237;dio</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
        </contrib>
      </contrib-group>
      <aff id="aff1">
        <label>1</label>
        <institution content-type="orgdiv1">Departamento de Cardiologia</institution>
        <institution content-type="orgname">Centro Hospitalar de Tr&#225;s os Montes e Alto Douro</institution>
        <addr-line>
          <named-content content-type="city">Vila Real</named-content>
        </addr-line>
        <country country="PT">Portugal</country>
        <institution content-type="original">Departamento de Cardiologia, Centro Hospitalar de Tr&#225;s os Montes e Alto Douro, Vila Real &#8211; Portugal</institution>
      </aff>
      <author-notes>
        <corresp id="c01"> Correspond&#234;ncia: Sara Cristina da Silva Borges &#8226; Departamento de Cardiologia, Centro Hospitalar de Tr&#225;s os Montes e Alto Douro &#8211; Avenida da Noruega, 5000-508, Vila Real &#8211; Portugal E-mail: <email>saracs.borges@gmail.com</email> </corresp>
        <fn fn-type="con">
          <p>Contribui&#231;&#227;o dos autores</p>
          <p>Concep&#231;&#227;o e desenho da pesquisa: Borges SCS, Carvalho CIR, Gon&#231;alves METM, Baptista AIS; Obten&#231;&#227;o de dados e An&#225;lise e interpreta&#231;&#227;o dos dados: Borges SCS, Gon&#231;alves METM, Baptista AIS; Reda&#231;&#227;o do manuscrito: Borges SCS, Carvalho CIR; Revis&#227;o cr&#237;tica do manuscrito quanto ao conte&#250;do intelectual importante: Gon&#231;alves METM, Baptista AIS, Moreira JI.</p>
        </fn>
        <fn fn-type="conflict">
          <p>Potencial conflito de interesse</p>
          <p>N&#227;o h&#225; conflito com o presente artigo</p>
        </fn>
      </author-notes>
      <pub-date date-type="pub" publication-format="electronic">
        <day>13</day>
        <month>05</month>
        <year>2022</year>
      </pub-date>
      <pub-date date-type="collection" publication-format="electronic">
        <month>05</month>
        <year>2022</year>
      </pub-date>
      <volume>118</volume>
      <issue>5</issue>
      <fpage>1000</fpage>
      <lpage>1001</lpage>
      <history>
        <date date-type="received">
          <day>23</day>
          <month>09</month>
          <year>2021</year>
        </date>
        <date date-type="rev-recd">
          <day>01</day>
          <month>12</month>
          <year>2021</year>
        </date>
        <date date-type="accepted">
          <day>26</day>
          <month>01</month>
          <year>2022</year>
        </date>
      </history>
      <permissions>
        <license license-type="open-access" xlink:href="https://creativecommons.org/licenses/by/4.0/" xml:lang="en">
          <license-p> This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. </license-p>
        </license>
      </permissions>
      <kwd-group xml:lang="pt">
        <kwd>Anormalidades Cardiovasculares</kwd>
        <kwd>Anomalias dos Vasos Coron&#225;rios</kwd>
        <kwd>Angiografia Coron&#225;ria/m&#233;todos</kwd>
        <kwd>Angiotomografia do Cora&#231;&#227;o</kwd>
        <kwd>Diagn&#243;stico por Imagem</kwd>
        <kwd>Anomalias Intracavit&#225;rias/diagn&#243;stico</kwd>
      </kwd-group>
      <counts>
        <fig-count count="4"/>
        <table-count count="0"/>
        <equation-count count="0"/>
        <ref-count count="5"/>
        <page-count count="2"/>
      </counts>
    </article-meta>
  </front>
  <body>
    <p>Um homem de 66 anos com hist&#243;ria de palpita&#231;&#245;es sugestivas de taquicardia supraventricular parox&#237;stica foi encaminhado para angiotomografia (ATC) para investiga&#231;&#227;o da etiologia da dispneia de esfor&#231;o. A TC card&#237;aca controlada por ECG foi realizada usando o Somatom Go Scanner de fonte dupla de 64 cortes.</p>
    <p>A ATC mostrou a origem normal dos troncos das coron&#225;rias direita e esquerda, e n&#227;o havia evid&#234;ncia de doen&#231;a arterial coronariana obstrutiva. A art&#233;ria coron&#225;ria direita proximal (CD) tinha um trajeto epic&#225;rdico normal, mas notou-se que a mediana penetrava na parede atrial direita por um trajeto de 30 mm dentro do &#225;trio direito, saindo para seu trajeto usual no sulco atrioventricular posterior, conforme demonstrado via as imagens de TC de reconstru&#231;&#227;o multiplanar na proje&#231;&#227;o de intensidade m&#225;xima ( <xref ref-type="fig" rid="f01">Figura 1</xref> ), bem como as reconstru&#231;&#245;es tridimensionais ( <xref ref-type="fig" rid="f02">Figura 2</xref> ).</p>
    <p>
      <fig id="f01">
        <label>Figura 1</label>
        <caption>
          <title>&#8211; Painel A) Imagem multiplanar curva mostrando o trajeto intra-atrial da art&#233;ria coron&#225;ria direita (CD) (seta); Painel B) imagem de proje&#231;&#227;o de m&#225;xima intensidade mostrando a localiza&#231;&#227;o intra-atrial da CD; Painel C) Imagem axial de TC do trajeto intra-atrial da CD (seta).</title>
        </caption>
        <graphic xlink:href="1678-4170-abc-118-05-1000-10819-gf01.tif"/></fig>
    </p>
    <p>
      <fig id="f02">
        <label>Figura 2</label>
        <caption>
          <title>&#8211; Imagem 3D de angiotomografia coronariana mostra o trajeto epic&#225;rdico normal da CD proximal e sua entrada pela parede atrial direita.</title>
        </caption>
        <graphic xlink:href="1678-4170-abc-118-05-1000-10819-gf02.tif"/></fig>
    </p>
    <p>As anomalias das art&#233;rias coron&#225;rias (AACs) s&#227;o definidas como um grupo de doen&#231;as cong&#234;nitas caracterizadas por uma origem ou curso anormal de uma das principais art&#233;rias coron&#225;rias,com incid&#234;ncia variando de 1% a 5,6%.<sup><xref ref-type="bibr" rid="B1">1</xref></sup> As variantes conhecidas do trajeto da art&#233;ria coron&#225;ria podem ser amplamente classificadas em trajetos intramural, intracavit&#225;rio e a&#233;reo.</p>
    <p>A ponte mioc&#225;rdica &#233; a presen&#231;a de um trajeto intramural e &#233; mais comumente reconhecida no segmento m&#233;dio da descendente anterior esquerda (DAE). Os estudos mais recentes baseados em dados de ATC relatam uma preval&#234;ncia de at&#233; 30%. Por outro lado, a art&#233;ria coron&#225;ria intracavit&#225;ria &#233; uma rara varia&#231;&#227;o anat&#244;mica isolada com duas variantes descritas &#8211; um trajeto intracavit&#225;rio dentro da</p>
    <p>art&#233;ria descendente anterior distal para o ventr&#237;culo direito e um trajeto intracavit&#225;rio na ACD m&#233;dia para distal no &#225;trio direito. Esta &#250;ltima &#233; mais comum, com preval&#234;ncia estimada de 0,36%,<sup><xref ref-type="bibr" rid="B2">2</xref></sup> e cada vez mais reconhecida devido ao amplo uso de imagens card&#237;acas avan&#231;adas. A ATC &#233; reconhecida como a t&#233;cnica padr&#227;o-ouro para a avalia&#231;&#227;o de anomalias coronarianas cong&#234;nitas, pois oferece os benef&#237;cios de imagens n&#227;o invasivas de alta qualidade, exposi&#231;&#227;o &#224; radia&#231;&#227;o de baixa dose e oferece uma caracteriza&#231;&#227;o anat&#244;mica detalhada da origem e curso das art&#233;rias coron&#225;rias e sua rela&#231;&#227;o com as estruturas circundantes.<sup><xref ref-type="bibr" rid="B2">2</xref></sup></p>
    <p>Embora geralmente clinicamente benigna e provavelmente n&#227;o relacionada aos sintomas do nosso paciente, essa variante pode resultar em maior risco de dano inadvertido da ACD durante a manipula&#231;&#227;o do cateter no &#225;trio direito.<sup><xref ref-type="bibr" rid="B2">2</xref> - <xref ref-type="bibr" rid="B4">4</xref></sup></p>
    <p>Em conclus&#227;o, identificar e descrever esta anomalia fornece informa&#231;&#245;es cruciais para o cardiologista intervencionista ou o cirurgi&#227;o e deve ser prontamente destacada para evitar complica&#231;&#245;es.<sup><xref ref-type="bibr" rid="B5">5</xref></sup></p>
  </body>
  <back>
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    <fn-group>
      <fn fn-type="other">
        <p>Vincula&#231;&#227;o acad&#234;mica</p>
        <p>N&#227;o h&#225; vincula&#231;&#227;o deste estudo a programas de p&#243;s-gradua&#231;&#227;o.</p>
      </fn>
    </fn-group>
    <fn-group>
      <fn fn-type="supported-by">
        <p>Fontes de financiamento: O presente estudo n&#227;o teve fontes de financiamento externas.</p>
      </fn>
    </fn-group>
  </back>
  <sub-article article-type="translation" id="TRen" xml:lang="en">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Image</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Intracavitary Right Coronary Artery: An Incidental Finding with Potential Implications for Invasive Cardiac Procedures</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0003-1739-4096</contrib-id>
          <name>
            <surname>Borges</surname>
            <given-names>Sara Cristina da Silva</given-names>
          </name>
          <xref ref-type="aff" rid="aff1001">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Carvalho</surname>
            <given-names>Catarina Isabel Ribeiro</given-names>
          </name>
          <xref ref-type="aff" rid="aff1001">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Gon&#231;alves</surname>
            <given-names>Miguel Eduardo Teixeira Moz</given-names>
          </name>
          <xref ref-type="aff" rid="aff1001">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Baptista</surname>
            <given-names>Ana Isabel Santos</given-names>
          </name>
          <xref ref-type="aff" rid="aff1001">
            <sup>1</sup>
          </xref>
        </contrib>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0002-2386-9337</contrib-id>
          <name>
            <surname>Moreira</surname>
            <given-names>Jos&#233; Il&#237;dio</given-names>
          </name>
          <xref ref-type="aff" rid="aff1001">
            <sup>1</sup>
          </xref>
        </contrib>
      </contrib-group>
      <aff id="aff1001">
        <label>1</label>
        <country country="PT">Portugal</country>
        <institution content-type="original">Departamento de Cardiologia, Centro Hospitalar de Tr&#225;s os Montes e Alto Douro, Vila Real &#8211; Portugal</institution>
      </aff>
      <author-notes>
        <corresp id="c01001">Mailing Address: Sara Cristina da Silva Borges &#8226; Departamento de Cardiologia, Centro Hospitalar de Tr&#225;s os Montes e Alto Douro &#8211; Avenida da Noruega, 5000-508, Vila Real &#8211; Portugal E-mail: saracs.borges@gmail.com</corresp>
        <fn fn-type="con">
          <p>Author Contributions</p>
          <p>Conception and design of the research: Borges SCS, Carvalho CIR, Gon&#231;alves METM, Baptista AIS; Acquisition of data and Analysis and interpretation of the data: Borges SCS, Gon&#231;alves METM, Baptista AIS; Writing of the manuscript: Borges SCS, Carvalho CIR; Critical revision of the manuscript for intellectual contente: Gon&#231;alves METM, Baptista AIS, Moreira JI.</p>
        </fn>
        <fn fn-type="conflict">
          <p>Potential Conflict of Interest</p>
          <p>No potential conflict of interest relevant to this article was reported.</p>
        </fn>
      </author-notes>
      <kwd-group xml:lang="en">
        <kwd>Cardiovascular Abnormalities</kwd>
        <kwd>Coronary Vessel Anomalies</kwd>
        <kwd>Coronary Angiography/methods</kwd>
        <kwd>Tomography X-Ray Computed/methods</kwd>
        <kwd>Anomalous Intracaitary /diagnosis</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>A 66-year-old man with a history of palpitations suggestive of paroxysmal supraventricular tachycardia was referred for CT angiography (CTA) for exertional dyspnea etiology investigation. ECG-gated cardiac CT was performed using the 64-slices dual-source Somatom Go Scanner.</p>
      <p>CTA showed the normal origin of the right and left main coronary arteries, and there was no evidence of obstructive coronary artery disease. The proximal right coronary artery (RCA) had a normal epicardial course, but mid-RCA was noted to penetrate the right atrial wall for a 30 mm course within the right atrium, exiting to its usual course in the posterior atrioventricular groove, as demonstrated via the multiplanar reconstruction CT images at maximum intensity projection ( <xref ref-type="fig" rid="f01001">Figure 1</xref> ) as well as 3-dimensional reconstructions ( <xref ref-type="fig" rid="f02001">Figure 2</xref> ).</p>
      <p>
        <fig id="f01001">
          <label>Figure 1</label>
          <caption>
            <title>&#8211; Panel A) Curved multiplanar image showing the intra-atrial course of right coronary artery (RCA) (arrow); Panel B) maximum intensity projection image showing the intra-atrial location of the RCA; Panel C) Axial CT image of the intra-atrial course of RCA (arrow).</title>
          </caption>
          <graphic xlink:href="1678-4170-abc-118-05-1000-10819-gf01-en.tif"/></fig>
      </p>
      <p>
        <fig id="f02001">
          <label>Figure 2</label>
          <caption>
            <title>&#8211; CT coronary angiography 3D image shows the proximal RCA&#8217;s normal epicardial course and its entry through the right atrial wall.</title>
          </caption>
          <graphic xlink:href="1678-4170-abc-118-05-1000-10819-gf02-en.tif"/></fig>
      </p>
      <p>Coronary artery anomalies (CAAs) are defined as a group of congenital disorders characterized by an abnormal origin or course of one of the main coronary arteries, with an incidence ranging from 1% to 5.6%.<sup><xref ref-type="bibr" rid="B1">1</xref></sup> Known variants of a coronary artery trajectory can be broadly classified in intramural, intracavitary and aerial courses.</p>
      <p>Myocardial bridging is a presence of an intramural course and is most commonly recognized in the middle segment of the left anterior descending (LAD). The most recent studies based on CTA data report a prevalence as high as 30%. On the other hand, the Intracavitary coronary artery is a rare isolated anatomic variation with two described variants &#8211; an intracavitary course within the distal left anterior descending artery into the right ventricle and an intracavitary course in mid to distal RCA into the right atrium. The latter is more common, with an estimated prevalence of 0.36%,<sup><xref ref-type="bibr" rid="B2">2</xref></sup> and is increasingly recognized given the widespread use of advanced cardiac imaging. CTA is well recognized as the gold standard technique for the evaluation of congenital coronary anomalies as it provides the benefits of non-invasive high-quality imaging, low dose radiation exposure and offers a detailed anatomic characterization of origin and course of coronary arteries and its relationship with the surrounding structures.<sup><xref ref-type="bibr" rid="B2">2</xref></sup></p>
      <p>While usually clinically benign and probably unrelated to our patient&#8217;s symptoms, this variant may result in a higher risk of RCA inadvertent damage during catheter manipulation in the right atrium.<sup><xref ref-type="bibr" rid="B2">2</xref> - <xref ref-type="bibr" rid="B4">4</xref></sup></p>
      <p>In conclusion, identifying and describing this anomaly provides crucial information to the interventional cardiologist or surgeon and should be promptly highlighted in order to prevent complications.<sup><xref ref-type="bibr" rid="B5">5</xref></sup></p>
    </body>
    <back>
      <fn-group>
        <fn fn-type="other">
          <p>Study Association</p>
          <p>This study is not associated with any thesis or dissertation work.</p>
        </fn>
      </fn-group>
      <fn-group>
        <fn fn-type="supported-by">
          <p>Sources of Funding: There were no external funding sources for this study.</p>
        </fn>
      </fn-group>
    </back>
  </sub-article>
</article>
