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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">kC3TmgHdg97Vsn3SzMsjPZq</article-id>
      <article-id specific-use="scielo-v2" pub-id-type="publisher-id">S0066-782X2023001200204</article-id>
      <article-id pub-id-type="other">00204</article-id>
      <article-id pub-id-type="doi">10.36660/abc.20230832</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Minieditorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Existe uma Associa&#231;&#227;o entre os Resultados de Desempenho do Teste <italic>Timed Up And Go</italic> e o Consumo de Oxig&#234;nio de Pico Medido Diretamente em Pacientes com Doen&#231;a Card&#237;aca?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="editor">
          <contrib-id contrib-id-type="orcid">0000-0001-6929-8392</contrib-id>
          <name>
            <surname>Ferrari</surname>
            <given-names>Filipe</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
          <xref ref-type="aff" rid="aff2">
            <sup>2</sup>
          </xref>
          <xref ref-type="corresp" rid="c1"/>
        </contrib>
        <contrib contrib-type="editor">
          <contrib-id contrib-id-type="orcid">0000-0003-2357-5176</contrib-id>
          <name>
            <surname>Stein</surname>
            <given-names>Ricardo</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">
            <sup>1</sup>
          </xref>
          <xref ref-type="aff" rid="aff2">
            <sup>2</sup>
          </xref>
        </contrib>
        <aff id="aff1">
          <label>1</label>
          <institution content-type="orgname">Universidade Federal do Rio Grande do Sul</institution>
          <institution content-type="orgdiv1">Hospital de Cl&#237;nicas de Porto Alegre</institution>
          <addr-line>
            <named-content content-type="city">Porto Alegre</named-content>
            <named-content content-type="state">RS</named-content>
          </addr-line>
          <country country="BR">Brasil</country>
          <institution content-type="original">Programa de P&#243;s-Gradua&#231;&#227;o em Cardiologia e Ci&#234;ncias Cardiovasculares &#8211; Universidade Federal do Rio Grande do Sul, Hospital de Cl&#237;nicas de Porto Alegre, Porto Alegre, RS &#8211; Brasil</institution>
        </aff>
        <aff id="aff2">
          <label>2</label>
          <institution content-type="orgname">Universidade Federal do Rio Grande do Sul</institution>
          <institution content-type="orgdiv1">Hospital de Cl&#237;nicas de Porto Alegre</institution>
          <institution content-type="orgdiv2">Grupo de Pesquisa em Cardiologia do Exerc&#237;cio</institution>
          <addr-line>
            <named-content content-type="city">Porto Alegre</named-content>
            <named-content content-type="state">RS</named-content>
          </addr-line>
          <country country="BR">Brasil</country>
          <institution content-type="original">Grupo de Pesquisa em Cardiologia do Exerc&#237;cio (CardioEx) &#8211; Universidade Federal do Rio Grande do Sul, Hospital de Cl&#237;nicas de Porto Alegre, Porto Alegre, RS &#8211; Brasil</institution>
        </aff>
      </contrib-group>
      <author-notes>
        <corresp id="c1"><bold>Correspond&#234;ncia: Filipe Ferrari</bold> &#8226; Hospital de Cl&#237;nicas de Porto Alegre &#8211; Rua Ramiro Barcelos, 2350. <postal-code>CEP 90035-007</postal-code>, Santa Cec&#237;lia, Porto Alegre, RS &#8211; Brasil E-mail: <email>ferrari.filipe88@gmail.com</email></corresp>
      </author-notes>
      <pub-date publication-format="electronic" date-type="pub">
        <day>04</day>
        <month>03</month>
        <year>2024</year>
      </pub-date>
      <pub-date publication-format="electronic" date-type="collection">
        <year>2023</year>
      </pub-date>
      <volume>120</volume>
      <issue>12</issue>
      <elocation-id>e20230832</elocation-id>
      <history>
        <date date-type="received">
          <day>02</day>
          <month>12</month>
          <year>2023</year>
        </date>
        <date date-type="rev-recd">
          <day>18</day>
          <month>01</month>
          <year>2024</year>
        </date>
        <date date-type="accepted">
          <day>18</day>
          <month>01</month>
          <year>2024</year>
        </date>
      </history>
      <permissions>
        <license license-type="open-access" xml:lang="en" xlink:href="https://creativecommons.org/licenses/by/4.0/">
          <license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution License</license-p>
        </license>
      </permissions>
      <kwd-group xml:lang="pt">
        <title>Palavras-chave</title>
        <kwd>Doen&#231;as Cardiovasculares</kwd>
        <kwd>Consumo de Oxig&#234;nio</kwd>
        <kwd>Avalia&#231;&#227;o de Resultados em Cuidados de Sa&#250;de</kwd>
        <kwd>Equil&#237;brio Postural</kwd>
        <kwd>Teste Timed Up and Go</kwd>
      </kwd-group>
      <counts>
        <fig-count count="0"/>
        <table-count count="0"/>
        <equation-count count="0"/>
        <ref-count count="9"/>
      </counts>
    </article-meta>
  </front>
  <body>
    <p>A capacidade funcional, a aptid&#227;o para realizar atividades di&#225;rias de forma independente,<sup><xref ref-type="bibr" rid="B1">1</xref></sup> &#233; comumente avaliada por meio de testes padronizados, como o teste de caminhada de 6 minutos,<sup><xref ref-type="bibr" rid="B2">2</xref></sup> o teste <italic>Timed Up and Go</italic> (TUGT)<sup><xref ref-type="bibr" rid="B3">3</xref></sup> e o teste de sentar e levantar de um minuto.<sup><xref ref-type="bibr" rid="B4">4</xref></sup> No entanto, o padr&#227;o ouro para avalia&#231;&#227;o da capacidade funcional ou cardiorrespirat&#243;ria &#233; o teste cardiopulmonar de exerc&#237;cio (TCPE),<sup><xref ref-type="bibr" rid="B5">5</xref></sup> que mede o consumo de oxig&#234;nio de pico (VO<sub>2</sub>pico). O TCPE envolve o aumento gradual da intensidade do exerc&#237;cio at&#233; a exaust&#227;o ou in&#237;cio dos sintomas.</p>
    <p>Numerosos estudos demonstram consistentemente uma forte associa&#231;&#227;o inversa entre VO<sub>2</sub>pico e eventos cardiovasculares, mortalidade cardiovascular e mortalidade por todas as causas,<sup><xref ref-type="bibr" rid="B5">5</xref>,<xref ref-type="bibr" rid="B6">6</xref></sup> sublinhando o papel fundamental da capacidade funcional no contexto das doen&#231;as cardiovasculares. Al&#233;m disso, na insufici&#234;ncia card&#237;aca, independentemente do status da fra&#231;&#227;o de eje&#231;&#227;o, o mau desempenho no teste de caminhada de 6 minutos tem sido associado a riscos elevados de mortalidade por todas as causas e insufici&#234;ncia card&#237;aca.<sup><xref ref-type="bibr" rid="B7">7</xref></sup></p>
    <p>Nesta edi&#231;&#227;o dos Arquivos Brasileiros de Cardiologia, Santos et al.<sup><xref ref-type="bibr" rid="B8">8</xref></sup> exploraram a rela&#231;&#227;o entre o TUGT, uma medida do tempo que uma pessoa leva para se levantar de uma cadeira, caminhar uma dist&#226;ncia de 3 metros e depois sentar-se novamente, e VO<sub>2</sub>pico em indiv&#237;duos com insufici&#234;ncia card&#237;aca ou doen&#231;a arterial coronariana. O estudo incluiu 200 participantes (com idades entre 36 e 92 anos; 70% do sexo masculino) inscritos em um programa de reabilita&#231;&#227;o card&#237;aca. Notavelmente, 30% dos participantes tiveram insufici&#234;ncia card&#237;aca, enquanto 70% tiveram doen&#231;a arterial coronariana. Todos os participantes foram submetidos ao TUGT e ao TCPE para avaliar sua capacidade funcional. Os pesquisadores desenvolveram uma equa&#231;&#227;o baseada no desempenho do TUGT que previu com precis&#227;o o VO<sub>2</sub>pico, alcan&#231;ando uma &#225;rea sob a curva de 0,80. Foi identificado um ponto de corte do TUGT de 5,47 segundos para predizer VO<sub>2</sub>pico &#8805; 20 ml.kg-&#185;.min-&#185;, com sensibilidade de 83% e especificidade de 67%.<sup><xref ref-type="bibr" rid="B8">8</xref></sup> Esse ponto de corte &#233; clinicamente significativo, pois pode ser utilizado para estratificar o risco em pacientes com insufici&#234;ncia card&#237;aca. Indiv&#237;duos com VO<sub>2</sub>pico&gt; 20 ml.kg-&#185;.min-&#185; apresentam baixo risco, garantindo mais de 95% de sobrevida livre de eventos em 1 ano. Por outro lado, aqueles com VO<sub>2</sub>pico &lt; 14 ml.kg-&#185;.min-&#185; enfrentam um risco de mortalidade superior a 20% no mesmo per&#237;odo de um ano.<sup><xref ref-type="bibr" rid="B9">9</xref></sup></p>
    <p>A capacidade preditiva do TUGT para VO<sub>2</sub>pico tem implica&#231;&#245;es cl&#237;nicas significativas, oferecendo aos profissionais de sa&#250;de um meio conveniente e eficiente para avaliar a capacidade funcional de um indiv&#237;duo e, posteriormente, o seu risco de resultados cardiovasculares adversos. Al&#233;m disso, o TUGT vai al&#233;m do seu papel como preditor do VO<sub>2</sub>pico, servindo como uma ferramenta valiosa para avaliar a funcionalidade global. Ao quantificar o tempo necess&#225;rio para um indiv&#237;duo se levantar de uma cadeira, percorrer uma curta dist&#226;ncia e depois retornar &#224; posi&#231;&#227;o sentada, o TUGT fornece insights sobre a capacidade da pessoa de realizar atividades di&#225;rias essenciais. Esta informa&#231;&#227;o &#233; fundamental para o planejamento da reabilita&#231;&#227;o, monitoramento do paciente e avalia&#231;&#227;o abrangente da qualidade de vida geral.</p>
    <p>Apesar da hip&#243;tese convincente apresentada pelos autores, &#233; crucial reconhecer as limita&#231;&#245;es inerentes ao estudo. Sua validade externa &#233; limitada pelo seu desenho unic&#234;ntrico no Brasil e pelo tamanho amostral relativamente pequeno. Al&#233;m disso, a aus&#234;ncia de informa&#231;&#245;es sobre poss&#237;veis varia&#231;&#245;es nos procedimentos de teste entre os grupos de insufici&#234;ncia card&#237;aca e doen&#231;a arterial coronariana introduz uma camada adicional de complexidade. O perfil &#233;tnico dos participantes (brancos, negros etc.) e o seu potencial impacto nos resultados tamb&#233;m permanece pouco claro. Notavelmente, a maioria dos pacientes deste estudo pertencia &#224;s classes funcionais I e II da NYHA, com apenas 10% enquadrando-se nas classes III e IV. Portanto, deve-se ter cautela ao extrapolar esses achados para indiv&#237;duos com insufici&#234;ncia card&#237;aca, particularmente aqueles com capacidade f&#237;sica mais limitada. Finalmente, embora elogiemos os esfor&#231;os dos autores, &#233; necess&#225;ria uma avalia&#231;&#227;o abrangente e valida&#231;&#227;o das associa&#231;&#245;es entre o teste TUGT e o VO<sub>2</sub>pico medido diretamente. Investiga&#231;&#245;es em larga escala, abrangendo um espectro mais amplo de participantes, s&#227;o indispens&#225;veis.</p>
  </body>
  <back>
    <fn-group>
      <fn fn-type="other" id="fn1">
        <p>Minieditorial referente ao artigo: Predi&#231;&#227;o do Consumo de Oxig&#234;nio de Pico em Pacientes Cardiopatas com Base no Desempenho no Teste <italic>Timed Up and Go</italic></p>
      </fn>
    </fn-group>
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              <given-names>DS</given-names>
            </name>
            <name>
              <surname>Queiroz</surname>
              <given-names>CO</given-names>
            </name>
            <name>
              <surname>Dias</surname>
              <given-names>CMCC</given-names>
            </name>
            <name>
              <surname>Cipriano</surname>
              <given-names>G</given-names>
              <suffix>Junior</suffix>
            </name>
            <name>
              <surname>Borges</surname>
              <given-names>QO</given-names>
            </name>
            <name>
              <surname>Ritt</surname>
              <given-names>LER</given-names>
            </name>
          </person-group>
          <article-title>Prediction of Peak Oxygen Consumption in Patients with Heart Disease Based on Performance on the Timed Up and Go Test</article-title>
          <source>Arq Bras Cardiol</source>
          <year>2023</year>
          <volume>120</volume>
          <issue>12</issue>
          <elocation-id>e20230338</elocation-id>
          <comment>
            <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.36660/abc.20230338">https://doi.org/10.36660/abc.20230338</ext-link>
          </comment>
        </element-citation>
        <mixed-citation>8 Santos DS, Queiroz CO, Dias CMCC, Cipriano Junior G, Borges QO, Ritt LER. Prediction of Peak Oxygen Consumption in Patients with Heart Disease Based on Performance on the Timed Up and Go Test. Arq Bras Cardiol. 2023; 120(12):e20230338. DOI: <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.36660/abc.20230338">https://doi.org/10.36660/abc.20230338</ext-link></mixed-citation>
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              <surname>Malhotra</surname>
              <given-names>R</given-names>
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              <surname>Bakken</surname>
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              <surname>D&#8217;Elia</surname>
              <given-names>E</given-names>
            </name>
            <name>
              <surname>Lewis</surname>
              <given-names>GD</given-names>
            </name>
          </person-group>
          <article-title>Cardiopulmonary Exercise Testing in Heart Failure</article-title>
          <source>JACC Heart Fail</source>
          <year>2016</year>
          <volume>4</volume>
          <issue>8</issue>
          <fpage>607</fpage>
          <lpage>616</lpage>
          <pub-id pub-id-type="doi">10.1016/j.jchf.2016.03.022</pub-id>
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        <mixed-citation>9 Malhotra R, Bakken K, D&#8217;Elia E, Lewis GD. Cardiopulmonary Exercise Testing in Heart Failure. JACC Heart Fail. 2016;4(8):607-16. doi: 10.1016/j.jchf.2016.03.022</mixed-citation>
      </ref>
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  </back>
  <sub-article article-type="translation" id="S1" xml:lang="en">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Short Editorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Is There an Association Between Timed Up and Go Test Performance Results and Directly Measured Peak Oxygen Consumption in Patients with Heart Disease?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="editor">
          <contrib-id contrib-id-type="orcid">0000-0001-6929-8392</contrib-id>
          <name>
            <surname>Ferrari</surname>
            <given-names>Filipe</given-names>
          </name>
          <xref ref-type="aff" rid="aff3">
            <sup>1</sup>
          </xref>
          <xref ref-type="aff" rid="aff4">
            <sup>2</sup>
          </xref>
          <xref ref-type="corresp" rid="c2"/>
        </contrib>
        <contrib contrib-type="editor">
          <contrib-id contrib-id-type="orcid">0000-0003-2357-5176</contrib-id>
          <name>
            <surname>Stein</surname>
            <given-names>Ricardo</given-names>
          </name>
          <xref ref-type="aff" rid="aff3">
            <sup>1</sup>
          </xref>
          <xref ref-type="aff" rid="aff4">
            <sup>2</sup>
          </xref>
        </contrib>
        <aff id="aff3">
          <label>1</label>
          <addr-line>
            <named-content content-type="city">Porto Alegre</named-content>
            <named-content content-type="state">RS</named-content>
          </addr-line>
          <country country="BR">Brazil</country>
          <institution content-type="original">Programa de P&#243;s-Gradua&#231;&#227;o em Cardiologia e Ci&#234;ncias Cardiovasculares &#8211; Universidade Federal do Rio Grande do Sul, Hospital de Cl&#237;nicas de Porto Alegre, Porto Alegre, RS &#8211; Brazil</institution>
        </aff>
        <aff id="aff4">
          <label>2</label>
          <addr-line>
            <named-content content-type="city">Porto Alegre</named-content>
            <named-content content-type="state">RS</named-content>
          </addr-line>
          <country country="BR">Brazil</country>
          <institution content-type="original">Grupo de Pesquisa em Cardiologia do Exerc&#237;cio (CardioEx) &#8211; Universidade Federal do Rio Grande do Sul, Hospital de Cl&#237;nicas de Porto Alegre, Porto Alegre, RS &#8211; Brazil</institution>
        </aff>
      </contrib-group>
      <author-notes>
        <corresp id="c2"><bold>Mailing Address: Filipe Ferrari</bold> &#8226; Hospital de Cl&#237;nicas de Porto Alegre &#8211; Rua Ramiro Barcelos, 2350. Postal Code <postal-code>90035-007</postal-code>, Santa Cec&#237;lia, Porto Alegre, RS &#8211; Brazil E-mail: <email>ferrari.filipe88@gmail.com</email></corresp>
      </author-notes>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>Cardiovascular Diseases</kwd>
        <kwd>Oxygen Consumption</kwd>
        <kwd>Outcome Assessment</kwd>
        <kwd>Health Care</kwd>
        <kwd>Postural Balance</kwd>
        <kwd>Test Timed Up and Go</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>Functional capacity, the ability to perform daily activities independently,<sup><xref ref-type="bibr" rid="B1">1</xref></sup> is commonly assessed using standardized tests like the 6-minute walk test,<sup><xref ref-type="bibr" rid="B2">2</xref></sup> Timed Up and Go Test (TUGT),<sup><xref ref-type="bibr" rid="B3">3</xref></sup> and one-minute sit-to-stand test.<sup><xref ref-type="bibr" rid="B4">4</xref></sup> However, the gold standard for evaluating functional or cardiorespiratory capacity is cardiopulmonary exercise testing (CPET),<sup><xref ref-type="bibr" rid="B5">5</xref></sup> which measures peak oxygen consumption (VO<sub>2</sub>peak). CPET involves gradually increasing exercise intensity until exhaustion or symptom onset.</p>
      <p>Numerous studies consistently demonstrate a strong inverse association between VO<sub>2</sub>peak and cardiovascular events, cardiovascular mortality, and all-cause mortality,<sup><xref ref-type="bibr" rid="B5">5</xref>,<xref ref-type="bibr" rid="B6">6</xref></sup> underscoring the pivotal role of functional capacity in the context of cardiovascular diseases. Moreover, in heart failure, regardless of ejection fraction status, poor performance on the 6-minute walk test has been linked to elevated risks of all-cause mortality and heart failure.<sup><xref ref-type="bibr" rid="B7">7</xref></sup></p>
      <p>In this issue of the <italic>Arquivos Brasileiros de Cardiologia</italic>, Santos et al.<sup><xref ref-type="bibr" rid="B8">8</xref></sup> explored the relationship between the TUGT, a measure of the time it takes for a person to rise from a chair, walk a distance of 3 meters and then sit down again, and VO<sub>2</sub>peak in individuals with heart failure or coronary artery disease. The study included 200 participants (aged 36 to 92 years; 70% males) enrolled in a cardiac rehabilitation program. Remarkably, 30% of the participants had heart failure, while 70% had coronary artery disease. All participants underwent both TUGT and CPET to evaluate their functional capacity. The researchers devised an equation based on TUGT performance that accurately predicted VO<sub>2</sub>peak, achieving an area under the curve of 0.80. A TUGT cutoff point of 5.47 seconds was identified to predict a VO<sub>2</sub>peak &#8805; 20 ml.kg-&#185;.min-&#185;, with a sensitivity of 83% and a specificity of 67%.<sup><xref ref-type="bibr" rid="B8">8</xref></sup> This cutoff point holds clinically significant as it can be utilized to stratify risk in patients with heart failure. Individual with a VO<sub>2</sub>peak &gt; 20 ml.kg-&#185;.min-&#185; exhibit a low risk, ensuring over 95% event-free survival at 1 year. Conversely, those with a VO<sub>2</sub>peak &lt; 14 ml.kg-&#185;.min-&#185; face a greater than 20% mortality risk at the same one-year mark.<sup><xref ref-type="bibr" rid="B9">9</xref></sup></p>
      <p>The predictive capacity of the TUGT for VO<sub>2</sub>peak has significant clinical implications, offering healthcare providers a convenient and efficient means to evaluate an individual's functional capacity and, subsequently, their risk of adverse cardiovascular outcomes. Moreover, the TUGT goes beyond its role as a predictor of VO<sub>2</sub>peak, serving as a valuable tool for assessing overall functionality. By quantifying the time required for an individual to rise from a chair, cover a short distance, and then return to a seated position, the TUGT provides insights into the person's ability to perform essential daily activities. This information is pivotal for rehabilitation planning, patient monitoring, and comprehensive assessment of overall quality of life.</p>
      <p>Despite the compelling hypothesis presented by the authors, it is crucial to acknowledge the inherent limitations of the study. Its external validity is constrained by its single-center design in Brazil and a relatively small sample size. Moreover, the absence of information regarding potential variations in testing procedures between the heart failure and coronary artery disease groups introduces an additional layer of complexity. The ethnic profile of the participants (white, black, etc.) and its potential impact on the results also remains unclear. Notably, the majority of patients in this study belonged to NYHA functional classes I and II, with only 10% falling into classes III and IV. Therefore, caution should be exercised when extrapolating these findings to individuals with heart failure, particularly those with more limited physical capacity. Finally, while we commend the authors&#8217; efforts, a comprehensive assessment and validation of the associations between the TUGT test and directly measured VO<sub>2</sub>peak is necessary. Larger-scale investigations encompassing a broader spectrum of participants are indispensable.</p>
    </body>
    <back>
      <fn-group>
        <fn fn-type="other" id="fn2">
          <p>Short Editorial related to the article: Prediction of Peak Oxygen Consumption in Patients with Heart Disease Based on Performance on the Timed Up and Go Test</p>
        </fn>
      </fn-group>
    </back>
  </sub-article>
</article>
