<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.1 20151215//EN" "https://jats.nlm.nih.gov/publishing/1.1/JATS-journalpublishing1.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" specific-use="sps-1.9" dtd-version="1.1" xml:lang="pt" article-type="letter">
  <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">QJgGKLssdbZPQypYM96gckt</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2012001400014</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(12)09900514</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X2012001400014</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Carta ao Editor</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>A verdadeira preval&#234;ncia da hipertens&#227;o resistente</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Sabbatini</surname>
            <given-names>Andr&#233;a Rodrigues</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Fontana</surname>
            <given-names>Vanessa</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Moreno Jr</surname>
            <given-names>Heitor</given-names>
          </name>
          <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 Estadual de Campinas</institution>
        <institution content-type="orgdiv1">Faculdade de Ci&#234;ncias M&#233;dicas </institution>
        <institution content-type="orgdiv2">Departamento de Farmacologia</institution>
        <country country="BR">Brazil</country>
      </aff>
      <aff id="aff02">
        <addr-line>
          <named-content content-type="state">S&#227;o Paulo</named-content>
        </addr-line>
        <institution content-type="orgname">Universidade Estadual de Campinas</institution>
        <institution content-type="orgdiv1">Faculdade de Ci&#234;ncias M&#233;dicas </institution>
        <institution content-type="orgdiv2">Departamento de Medicina Interna</institution>
        <country country="BR">Brazil</country>
      </aff>
      <pub-date date-type="collection" publication-format="electronic">
        <month>11</month>
        <year>2012</year>
      </pub-date>
      <volume>99</volume>
      <issue>5</issue>
      <fpage>1068</fpage>
      <lpage>1068</lpage>
      <history>
        <date date-type="received">
          <day>24</day>
          <month>07</month>
          <year>2012</year>
        </date>
        <date date-type="accepted">
          <day>23</day>
          <month>08</month>
          <year>2012</year>
        </date>
        <date date-type="rev-recd">
          <day>24</day>
          <month>07</month>
          <year>2012</year>
        </date>
      </history>
      <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>
      <kwd-group xml:lang="pt" kwd-group-type="author-generated">
        <kwd>Hipertens&#227;o</kwd>
        <kwd>Preval&#234;ncia</kwd>
        <kwd>Ades&#227;o &#224; Medica&#231;&#227;o</kwd>
      </kwd-group>
      <pub-date publication-format="electronic" date-type="pub">
        <day>22</day>
        <month>11</month>
        <year>2012</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>
      <bold>CARTA AO EDITOR</bold>
    </p>
    <p>A verdadeira preval&#234;ncia da hipertens&#227;o resistente</p>
    <p>
      <bold>Andr&#233;a Rodrigues Sabbatini<sup>I</sup>; Vanessa Fontana<sup>I</sup>; Heitor Moreno Jr<sup>II</sup></bold>
    </p>
    <p><sup>I</sup>Laborat&#243;rio de Farmacologia Cardiovascular, Departamento de Farmacologia, Faculdade de Ci&#234;ncias M&#233;dicas, Universidade Estadual de Campinas, SP &#150; Brasil </p>
    <p><sup>II</sup>Ambulat&#243;rio de Hipertens&#227;o Resistente, Departamento de Medicina Interna, Faculdade de Ci&#234;ncias M&#233;dicas, Universidade Estadual de Campinas, SP &#150; Brasil</p>
    <p>
      <xref ref-type="corresp" rid="end">Correspond&#234;ncia</xref>
    </p>
    <p><bold>Palavras-chave: </bold>Hipertens&#227;o; Preval&#234;ncia; Ades&#227;o &#224; Medica&#231;&#227;o.</p>
    <p>
      <bold>Prezado Editor,</bold>
    </p>
    <p>A real preval&#234;ncia de hipertens&#227;o resistente (HR) &#233; desconhecida, ao menos em parte, porque sua defini&#231;&#227;o n&#227;o &#233; universalmente aceita. N&#243;s lemos, com grande interesse, o artigo publicado por Massierer e cols.<sup>1</sup>, demonstrando que a frequ&#234;ncia de pacientes com HR verdadeira &#233; mais baixa (3,0-4,5% da popula&#231;&#227;o geral de hipertensos) no atendimento cl&#237;nico quando comparada com a preval&#234;ncia de 14,5% estimada com base em dados do Spanish ABPM Registry<sup>2</sup>. A nosso ver, esta &#250;ltima estimativa n&#227;o leva em conta dados relacionados a hipertens&#227;o n&#227;o controlada por tratamento n&#227;o otimizado e falta de ader&#234;ncia, por exemplo. Assim, a preval&#234;ncia de HR observada por Massierer e cols.<sup>1</sup> &#233;, provavelmente, muito mais pr&#243;xima da real, tendo-se em vista que alguns erros em virtude de inconsist&#234;ncias na defini&#231;&#227;o dessa condi&#231;&#227;o, falta de crit&#233;rios r&#237;gidos e aus&#234;ncia de controle da qualidade de dados foram corretamente abordados.</p>
    <p>
      <bold>Carta-resposta</bold>
    </p>
    <p>Agradecemos o interesse dos colegas em nosso trabalho<sup>1</sup>. Conhecer-se a real frequ&#234;ncia de doen&#231;as &#233; indispens&#225;vel para o planejamento de cuidados e aloca&#231;&#227;o de recursos. Por vezes, estimativas s&#227;o artificialmente aumentadas em virtude de vieses de sele&#231;&#227;o. &#201; o que se configura no presente caso, a preval&#234;ncia de hipertens&#227;o resistente. Concordo com os colegas quanto ao entendimento de que essa preval&#234;ncia est&#225; superestimada. Defini&#231;&#227;o de diagn&#243;stico e bases amostrais n&#227;o representativas contribuem para isso, mas cabe destacar que muitos pacientes est&#227;o nessa condi&#231;&#227;o por insuficiente ades&#227;o ao tratamento. Em termos pragm&#225;ticos, pacientes com press&#227;o elevada porque n&#227;o tomam medicamentos est&#227;o sob risco similar aos que tomam e n&#227;o t&#234;m adequada resposta. Para os primeiros cabe empregar todas as t&#233;cnicas e energias para convenc&#234;-los a tomar os medicamentos, deixando para os segundos, bem menos frequentes, o emprego de m&#233;todos diagn&#243;sticos e terap&#234;uticos avan&#231;ados.</p>
    <p>
      <bold>Atenciosamente,</bold>
    </p>
    <p>Fl&#225;vio Danni Fuchs, Daniela Massierer, Ana Claudia Tonelli de Oliveira, Ana Maria Steinhorst, Miguel Gus, Aline Maria Ascoli, Sandro Cadaval Gon&#231;alves, Leila Beltrami Moreira, Vicente Correia Jr, Gerson Nunes, Sandra Costa Fuchs.</p>
    <p>
      <bold>Refer&#234;ncia (Carta-resposta)</bold>
    </p>
    <p>
      <fn id="end" fn-type="corresp">
        <p>Correspond&#234;ncia:</p>
        <p> Heitor Moreno-J&#250;nior </p>
        <p> Rua Jasmin, 850, Apto. 33, Primavera </p>
        <p> CEP 13087-460, Campinas, SP &#150; Brasil </p>
        <p> E-mail: </p>
        <p><email xlink:href="hmoreno@cardiol.br">hmoreno@cardiol.br</email>, </p>
        <p>
          <email xlink:href="hmoreno@uol.com.br">hmoreno@uol.com.br</email>
        </p>
      </fn>
    </p>
    <p>Artigo recebido em 24/07/12; revisado em 24/07/12; aceito em 23/0812.</p>
  </body>
  <back>
    <ref-list>
      <ref id="B1">
        <mixed-citation>1. Massierer D, Oliveira AC, Steinhorst AM, Gus M, Ascoli AM, Goncalves SC, et al. Prevalence of resistant hypertension in non-elderly adults: prospective study in a clinical setting. Arq Bras Cardiol. 2012;99(1):630-5.</mixed-citation>
        <element-citation publication-type="journal">
          <article-title>Prevalence of resistant hypertension in non-elderly adults: prospective study in a clinical setting</article-title>
          <source>Arq Bras Cardiol</source>
          <date>
            <year>2012</year>
          </date>
          <fpage>630</fpage>
          <lpage>5</lpage>
          <issue>1</issue>
          <volume>99</volume>
          <person-group person-group-type="author">
            <name>
              <surname>Massierer</surname>
              <given-names>D</given-names>
            </name>
            <name>
              <surname>Oliveira</surname>
              <given-names>AC</given-names>
            </name>
            <name>
              <surname>Steinhorst</surname>
              <given-names>AM</given-names>
            </name>
            <name>
              <surname>Gus</surname>
              <given-names>M</given-names>
            </name>
            <name>
              <surname>Ascoli</surname>
              <given-names>AM</given-names>
            </name>
            <name>
              <surname>Goncalves</surname>
              <given-names>SC</given-names>
            </name>
          </person-group>
        </element-citation>
      </ref>
      <ref id="B2">
        <mixed-citation>2. de la Sierra A, Banegas JR, Oliveras A, Gorostidi M, Segura J, de la Cruz JJ, et al. Clinical differences between resistant hypertensives and patients treated and controlled with three or less drugs. J Hypertens. 2012;30(6):1211-6.</mixed-citation>
        <element-citation publication-type="journal">
          <article-title>Clinical differences between resistant hypertensives and patients treated and controlled with three or less drugs</article-title>
          <source>J Hypertens</source>
          <date>
            <year>2012</year>
          </date>
          <fpage>1211</fpage>
          <lpage>6</lpage>
          <issue>6</issue>
          <volume>30</volume>
          <person-group person-group-type="author">
            <name>
              <surname>de la Sierra</surname>
              <given-names>A</given-names>
            </name>
            <name>
              <surname>Banegas</surname>
              <given-names>JR</given-names>
            </name>
            <name>
              <surname>Oliveras</surname>
              <given-names>A</given-names>
            </name>
            <name>
              <surname>Gorostidi</surname>
              <given-names>M</given-names>
            </name>
            <name>
              <surname>Segura</surname>
              <given-names>J</given-names>
            </name>
            <name>
              <surname>de la Cruz</surname>
              <given-names>JJ</given-names>
            </name>
          </person-group>
        </element-citation>
      </ref>
      <ref id="B3">
        <mixed-citation>1.  Massierer D, Oliveira AC, Steinhorst AM, Gus M, Ascoli AM, Goncalves SC, et al. Prevalence of resistant hypertension in non-elderly adults: prospective study in a clinical setting. Arq Bras Cardiol. 2012;99(1):630-5.</mixed-citation>
        <element-citation publication-type="journal">
          <article-title>Prevalence of resistant hypertension in non-elderly adults: prospective study in a clinical setting</article-title>
          <source>Arq Bras Cardiol</source>
          <date>
            <year>2012</year>
          </date>
          <fpage>630</fpage>
          <lpage>5</lpage>
          <issue>1</issue>
          <volume>99</volume>
          <person-group person-group-type="author">
            <name>
              <surname>Massierer</surname>
              <given-names>D</given-names>
            </name>
            <name>
              <surname>Oliveira</surname>
              <given-names>AC</given-names>
            </name>
            <name>
              <surname>Steinhorst</surname>
              <given-names>AM</given-names>
            </name>
            <name>
              <surname>Gus</surname>
              <given-names>M</given-names>
            </name>
            <name>
              <surname>Ascoli</surname>
              <given-names>AM</given-names>
            </name>
            <name>
              <surname>Goncalves</surname>
              <given-names>SC</given-names>
            </name>
          </person-group>
        </element-citation>
      </ref>
    </ref-list>
  </back>
  <sub-article article-type="translation" id="TRen" xml:lang="en">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Letter to the Editor</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">True prevalence of resistant hypertension</article-title>
      </title-group>
      <kwd-group xml:lang="en">
        <kwd>Hypertension</kwd>
        <kwd>Prevalence</kwd>
        <kwd>Medication Adherence</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>
        <bold>LETTER TO THE EDITOR</bold>
      </p>
      <p><undefined id="tx-body2"/>True prevalence of resistant hypertension</p>
      <p>
        <bold>Andr&#233;a Rodrigues Sabbatini<sup>I</sup>; Vanessa Fontana<sup>I</sup>; Heitor Moreno Jr<sup>II</sup></bold>
      </p>
      <p><sup>I</sup>Cardiovascular Pharmacology Laboratory, Departmentof Pharmacology, Faculty of Medical Sciences, State University of Campinas, SP &#150; Brazil</p>
      <p><sup>II</sup>Resistant Hypertension Unit, Department of Internal Medicine, Faculty of Medical Sciences, State University of Campinas, SP &#150; Brazil</p>
      <p>Mailing Address</p>
      <p><bold>Keywords: </bold>Hypertension; Prevalence; Medication Adherence.</p>
      <p>
        <bold>Dear Editor,</bold>
      </p>
      <p>The true prevalence of resistant hypertension (RHT) is unknown, at least in part because its definition is not consistent worldwide. We have read with great interest the article by Massierer et al. <sup>(1)</sup> showing that the frequency of patients with true RHT is lower (3.0-4.5% of the general hypertensive population) in clinical settings when compared to 14.5% estimated in the Spanish ABPM Registry <sup>(2)</sup>. In our opinion, the latter estimates do not completely account for uncontrolled hypertension secondary to undertreatment and poor adherence, for example. Thus, the present findings are probably much closer to the real prevalence of RHT considering that errors due to inconsistencies in defining RHT, lack of strict criteria for inclusion of patients and absence of quality control of the data were correctly taken into account.</p>
      <p>
        <bold>Reply</bold>
      </p>
      <p>We appreciate your interest in our work<sup>1</sup>. To establish the real frequency of diseases is essential for the planning of care and resource allocation. Sometimes the estimates are artificially increased due to selection biases. This appears to be the present issue on the prevalence of resistant hypertension. I agree with the colleagues regarding the understanding that this prevalence is overestimated. Variable definitions and case selection in unrepresentative samples contribute to that, but it is worth noting that many patients have this condition because of insufficient treatment adherence. In pragmatic terms, patients with high blood pressure because they are not using blood pressure drugs are at similar risk to those who use the medication and show inadequate response. Regarding the former, we should employ all the techniques and efforts to convince them to take the medication; as for the latter, which have a less frequently observed condition, advanced diagnostic and therapeutic methods should be used to treat them.</p>
      <p>
        <bold>Sincerely,</bold>
      </p>
      <p>Fl&#225;vio Danni Fuchs, Daniela Massierer, Ana Claudia Tonelli de Oliveira, Ana Maria Steinhorst, Miguel Gus, Aline Maria Ascoli, Sandro Cadaval Gon&#231;alves, Leila Beltrami Moreira, Vicente Correia Jr, Gerson Nunes, Sandra Costa Fuchs</p>
      <p>
        <bold>References</bold>
      </p>
      <p>
        <bold>Refer&#234;ncia (Carta-resposta)</bold>
      </p>
    </body>
  </sub-article>
</article>
