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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">RnBRpDk7pHHJr8X46RhDjyh</article-id>
      <article-id pub-id-type="other">00002</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2005002400002</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(05)08500002</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X2005002400002</article-id>
      <title-group>
        <article-title>Periodicidade e escolha de exames laboratoriais na terapia hipolipemiante</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>Special recommendations for lipid-lowering treatment: efficacy and safety</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Martinez</surname>
            <given-names>Tania Leme da Rocha</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Nascimento</surname>
            <given-names>Helena Maria do</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </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">HCFM </institution>
        <institution content-type="orgdiv2">Instituto do Cora&#231;&#227;o</institution>
        <country country="BR">Brazil</country>
      </aff>
      <pub-date date-type="collection" publication-format="electronic">
        <month>10</month>
        <year>2005</year>
      </pub-date>
      <volume>85</volume>
      <issue>suppl 5</issue>
      <fpage>6</fpage>
      <lpage>8</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>
      <abstract>
        <p>Interven&#231;&#245;es farmacol&#243;gicas com hipolipemiantes devem ser monitoradas periodicamente para avaliar efic&#225;cia e par&#226;metros de seguran&#231;a. As estatinas s&#227;o drogas normalmente bem toleradas e os seus principais efeitos colaterais incluem aumento das enzimas hep&#225;ticas (AST e ALT) e muscular (CK). O tratamento deve ser interrompido ou diminu&#237;do no caso de um aumento significativo das AST ou ALT (&gt; 3x LSN), ou CK (&gt; 10x LSN). Outros agentes hipolipemiantes tamb&#233;m podem produzir hepatotoxicidade ou miosite, fibratos e &#225;cido nicot&#237;nico, especialmente em associa&#231;&#227;o com as estatinas ou na presen&#231;a de anormalidades metab&#243;licas (tireoidite, hepatopatia e nefropatia). &#193;cido nicot&#237;nico pode tamb&#233;m aumentar os n&#237;veis plasm&#225;ticos de glicose e &#225;cido &#250;rico. Testes laboratoriais podem ser utilizados no seguimento da terapia hipolipemiante e devem ser repetidos a cada tr&#234;s meses durante o primeiro ano e ent&#227;o em intervalos de seis meses. Intervalos menores s&#227;o recomendados para casos especiais.</p>
      </abstract>
      <trans-abstract xml:lang="en">
        <p>Pharmacologic lipid-lowering interventions should be monitored periodically to assess efficacy and safety parameters. Statins are usually well-tolerated drugs and major side effects include increased serum liver and muscle enzymes (AST, ALT, CK). Treatment should be stopped or diminished in case of significant increase of AST or ALT (&gt; 3x ULN), or CK (&gt; 10x ULN). Other lipid lowering agents may also produce hepatotoxicity or myositis, especially in association with statins (fibrates and nicotinic acid) or in presence of metabolic abnormalities (thyroid, liver or renal disorders). Nicotinic acid can also increase glucose and uric acid plasma levels. Laboratory tests might be performed prior to hypolipidemic drug treatment and should be repeated every three months during the first year and then at 6-mo intervals. Shorter intervals should be recommended in individual cases.</p>
      </trans-abstract>
      <kwd-group xml:lang="en" kwd-group-type="author-generated">
        <kwd>Statins</kwd>
        <kwd>safety</kwd>
        <kwd>hepatotoxicity</kwd>
      </kwd-group>
      <kwd-group xml:lang="pt" kwd-group-type="author-generated">
        <kwd>Estatinas</kwd>
        <kwd>seguran&#231;a</kwd>
        <kwd>hepatotoxicidade</kwd>
      </kwd-group>
      <pub-date publication-format="electronic" date-type="pub">
        <day>02</day>
        <month>01</month>
        <year>2006</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>
      <bold>Periodicidade e escolha de exames laboratoriais na terapia hipolipemiante</bold>
    </p>
    <p>
      <bold>Special recommendations for lipid-lowering treatment: efficacy and safety</bold>
    </p>
    <p>
      <bold>Tania Leme da Rocha Martinez; Helena Maria do Nascimento</bold>
    </p>
    <p> Unidade Cl&#237;nica de Dislipidemias do Instituto do Cora&#231;&#227;o HCFMUSP </p>
    <p>
      <bold>RESUMO</bold>
    </p>
    <p>Interven&#231;&#245;es farmacol&#243;gicas com hipolipemiantes devem ser monitoradas periodicamente para avaliar efic&#225;cia e par&#226;metros de seguran&#231;a. As estatinas s&#227;o drogas normalmente bem toleradas e os seus principais efeitos colaterais incluem aumento das enzimas hep&#225;ticas (AST e ALT) e muscular (CK). O tratamento deve ser interrompido ou diminu&#237;do no caso de um aumento significativo das AST ou ALT (&gt; 3x LSN), ou CK (&gt; 10x LSN). Outros agentes hipolipemiantes tamb&#233;m podem produzir hepatotoxicidade ou miosite, fibratos e &#225;cido nicot&#237;nico, especialmente em associa&#231;&#227;o com as estatinas ou na presen&#231;a de anormalidades metab&#243;licas (tireoidite, hepatopatia e nefropatia). &#193;cido nicot&#237;nico pode tamb&#233;m aumentar os n&#237;veis plasm&#225;ticos de glicose e &#225;cido &#250;rico. Testes laboratoriais podem ser utilizados no seguimento da terapia hipolipemiante e devem ser repetidos a cada tr&#234;s meses durante o primeiro ano e ent&#227;o em intervalos de seis meses. Intervalos menores s&#227;o recomendados para casos especiais. </p>
    <p><bold>Palavras-chave:</bold> Estatinas, seguran&#231;a, hepatotoxicidade</p>
    <p>
      <bold>ABSTRACT</bold>
    </p>
    <p>Pharmacologic lipid-lowering interventions should be monitored periodically to assess efficacy and safety parameters. </p>
    <p>Statins are usually well-tolerated drugs and major side effects include increased serum liver and muscle enzymes (AST, ALT, CK). Treatment should be stopped or diminished in case of significant increase of AST or ALT (&gt; 3x ULN), or CK (&gt; 10x ULN). Other lipid lowering agents may also produce hepatotoxicity or myositis, especially in association with statins (fibrates and nicotinic acid) or in presence of metabolic abnormalities (thyroid, liver or renal disorders). Nicotinic acid can also increase glucose and uric acid plasma levels. </p>
    <p>Laboratory tests might be performed prior to hypolipidemic drug treatment and should be repeated every three months during the first year and then at 6-mo intervals. Shorter intervals should be recommended in individual cases.</p>
    <p><bold>Key words:</bold> Statins, safety, hepatotoxicity </p>
    <p>
      <bold>INTRODU&#199;&#195;O</bold>
    </p>
    <p>Embora o papel das dislipidemias na g&#234;nese da aterosclerose coronariana esteja bem estabelecido, o reconhecimento de que as altera&#231;&#245;es do perfil lip&#237;dico predisp&#245;e &#224; doen&#231;a coronariana,<sup>1 </sup>que o papel da terapia hipolipemiante na diminui&#231;&#227;o da morbidade e da mortalidade por doen&#231;a arterial coronariana seja indiscut&#237;vel,<sup>2</sup> como demonstraram os grandes estudos cl&#237;nicos de preven&#231;&#227;o prim&#225;ria e secund&#225;ria com o uso das estatinas,<sup>3,4</sup> e ainda, a publica&#231;&#227;o, h&#225; quase 10 anos, do II Consenso Brasileiro Sobre Dislipidemias,<sup>5</sup> &#233; com grande preocupa&#231;&#227;o que assistimos em nosso meio um enorme hiato entre as diretrizes e as metas de tratamento preconizadas e o dia-a-dia da pr&#225;tica m&#233;dica, sobretudo, na forma de orientar a busca pelas metas, a motiva&#231;&#227;o e a ader&#234;ncia ao tratamento, n&#227;o proporcionando assim, os benef&#237;cios incontestes do tratamento aos pacientes com dislipidemias.</p>
    <p>
      <bold>IMPLEMENTA&#199;&#195;O DAS DIRETRIZES</bold>
    </p>
    <p>No Programa de Avalia&#231;&#227;o Nacional do Conhecimento Sobre Preven&#231;&#227;o de Aterosclerose PANDORA<sup>6</sup> foram entrevistados 746 m&#233;dicos, dos quais 98% cardiologistas, utilizando-se um question&#225;rio com perguntas sobre dislipidemias, preven&#231;&#227;o de aterosclerose e recomenda&#231;&#245;es de metas terap&#234;uticas lip&#237;dicas a serem alcan&#231;adas, segundo o Consenso de 1996. Observou-se que 87% dos entrevistados referiram que o tratamento das dislipidemias pode mudar a hist&#243;ria natural da doen&#231;a coronariana. Embora a maioria dos participantes tenha seguido as recomenda&#231;&#245;es de colesterol total (CT) &lt; 200 mg/dl para preven&#231;&#227;o da aterosclerose, apenas 55,8% adotariam a meta de LDL-colesterol (LDL-c) &lt; 100 mg/dl para a preven&#231;&#227;o secund&#225;ria. Entre 30,5 e 36,7% responderam que o n&#237;vel de HDL-colesterol (HDL-c) para a preven&#231;&#227;o seria menor que 35 mg/dl e somente 32,7% de todos os entrevistados tratariam os pacientes indefinidamente com drogas hipolipemiantes. </p>
    <p>O programa concluiu que apesar dos m&#233;dicos valorizarem os lip&#237;des na preven&#231;&#227;o da aterosclerose, havia um s&#233;rio desconhecimento sobre as recomenda&#231;&#245;es do II Consenso Brasileiro Sobre Dislipidemias, ao nosso ver, uma desinforma&#231;&#227;o gerada pela falta de motiva&#231;&#227;o e de ader&#234;ncia do m&#233;dico &#224;s diretrizes, em preju&#237;zo dos pacientes. </p>
    <p>Em outro estudo, o COMETA<sup>7</sup>, em seu bra&#231;o brasileiro, na cidade de S&#227;o Paulo, 20 m&#233;dicos, selecionados de modo rand&#244;mico e a partir de uma base de dados privados, foram convidados a participar do estudo: 10 especialistas (cinco cardiologistas e cinco endocrinologistas) e dez cl&#237;nicos gerais sendo que pelo menos 50% do total da amostra de pacientes deveria ser particular. </p>
    <p>Os pacientes faziam uso de hipolipemiantes num per&#237;odo superior a 12 meses (estatinas, fibratos, niacina ou resina), perfazendo um total de 120 indiv&#237;duos, de ambos os sexos (63% do sexo feminino), com idades variando entre 26 e 90 anos (m&#233;dia 53 &#177; 13 anos), divididos em tr&#234;s categorias de risco absoluto com base no escore de Framingham e as metas de LDL-c a serem atingidas foram aquelas estabelecidas no NCEP-ATPIII.<sup>8</sup> Na fase inicial do estudo, 93% dos pacientes recebiam estatinas e 7% usavam fibratos. A sinvastatina (cuja pot&#234;ncia foi refer&#234;ncia padr&#227;o) e a atorvastatina, nas doses m&#233;dias de 12 a 26 mg/dia, respectivamente, foram as estatinas mais utilizadas e com essas doses (algumas ajustadas), 46% dos pacientes atingiram as metas de LDL-c. As maiores porcentagens de sucesso foram observadas entre os pacientes de baixo risco e os resultados n&#227;o foram influenciados pela especialidade do m&#233;dico. Entretanto, os achados desse estudo indicam que a porcentagem de pacientes que alcan&#231;aram as metas de LDL-c estabelecidas pelas diretrizes &#233; muito baixa. </p>
    <p>A amostra do COMETA incluiu 33% de pacientes de alto risco, 38% de moderado risco e 29% de baixo risco, todos eles tinham indica&#231;&#227;o de tratamento hipolipemiante, mas apenas 15%, 41% e 71% dos pacientes de alto, intermedi&#225;rio e baixo risco, respectivamente, conseguiram atingir as metas de LDL-c com o uso regular desses medicamentos. N&#227;o se utilizou a terapia combinada no estudo. As doses de sinvastatina e de atorvastatina empregadas em sua fase inicial e os ajustes posol&#243;gicos subseq&#252;entes n&#227;o foram suficientes para que os pacientes atingissem as metas de LDL-c preconizadas. </p>
    <p>Nossos resultados n&#227;o diferem dos dados de outros pa&#237;ses. Assim, Froliks e cols. avaliando dados de colegas dos EUA mostraram que apenas 50% dos m&#233;dicos avaliados seguiam as metas do NCEP para o LDL-c.<sup>9 </sup>Dados do EUROASPIRE,<sup>10 </sup>mostraram que cerca de 44% dos pacientes coronarianos avaliados apresentavam n&#237;veis de colesterol acima do preconizado. Recentemente, outro grande estudo, avaliando 140 cl&#237;nicas de cardiologia e de multiespecialidades, nos EUA, mostrou que apenas 25% de 58.890 portadores de doen&#231;a coronariana haviam atingido a meta de LDL-c <underline>&lt;</underline> 100 mg/dl proposta pelo NCEP.<sup>11 </sup>Uma das explica&#231;&#245;es para esses achados &#233; a de que m&#233;dicos n&#227;o tinham por h&#225;bito seguir ou desconheciam as recomenda&#231;&#245;es das sociedades m&#233;dicas.<sup>12 </sup>Outra explica&#231;&#227;o seria o excesso de recomenda&#231;&#245;es ou consensos sobre diversas doen&#231;as, o que tornaria a tarefa do m&#233;dico mais dif&#237;cil de ser cumprida, diminuindo a sua motiva&#231;&#227;o. </p>
    <p>Todos os dados dispon&#237;veis apontam que &#233; necess&#225;rio que as diretrizes nacionais e internacionais sejam amplamente difundidas, fazendo parte das ferramentas cl&#237;nicas atuais capazes de influenciar na diminui&#231;&#227;o das elevadas taxas de morbidade e mortalidade cardiovascular.</p>
    <p>
      <bold>PERIODICIDADE E ESCOLHA DE EXAMES LABORATORIAIS</bold>
    </p>
    <p>Quanto &#224; periodicidade dos exames laboratoriais que devem controlar o uso dos hipolipemiantes, dever&#225; variar de acordo com o quadro cl&#237;nico do paciente, seus n&#237;veis lip&#237;dicos (atingimento das metas) e a sua ades&#227;o ao tratamento. Os intervalos, portanto, podem ser mensais, trimestrais, semestrais ou anuais e sempre sucessivos no intuito de verificar a resposta do paciente &#224; droga &#224; efic&#225;cia e &#224; tolerabilidade.<sup> 13</sup></p>
    <p>Em geral, as estatinas s&#227;o bem toleradas, sendo que os seus efeitos secund&#225;rios mais freq&#252;entes s&#227;o: cefal&#233;ia, flatul&#234;ncia, dispepsia, dores musculares, prurido e exantema cut&#226;neo.<sup>14 </sup> Entretanto, al&#233;m das dosagens de l&#237;pides, faz-se mister que se escolha outros testes laboratoriais afim de monitorar os efeitos adversos das estatinas. Assim, devem ser solicitadas as aminotransferases (ALT e AST) para seguir a hepatotoxicidade e a creatinofosfoquinase (CK) para controle da miopatia. Os n&#237;veis preocupantes para as aminotransferases s&#227;o aqueles maiores que tr&#234;s vezes o limite superior de refer&#234;ncia e para a creatinofosfoquinase, maior que dez vezes o limite superior de refer&#234;ncia. Este evento ocorre em cerca de 0,1% dos pacientes.<sup>15 </sup>Deve-se monitor&#225;-las com n&#237;veis basais antes da institui&#231;&#227;o da terap&#234;utica com as estatinas, ap&#243;s 30 dias do in&#237;cio, aos tr&#234;s, seis, nove e doze meses subsequentes e sempre ap&#243;s aumento da dose, avaliando-se a cada tr&#234;s meses no primeiro ano e posteriormente a cada seis meses.</p>
    <p>Quando da prescri&#231;&#227;o do &#225;cido nicot&#237;nico, vale lembrar que deve utilizado com cuidado em pacientes diab&#233;ticos, monitorando com rigor a glicemia, uma vez que pode piorar o controle glic&#234;mico.<sup>13</sup></p>
    <p>Quanto aos fibratos, s&#227;o geralmente bem tolerados, mas raramente, pode-se observar um aumento de enzimas hep&#225;ticas (ALT e AST) e/ou da CK.<sup>13 </sup>Os valores toler&#225;veis dessas enzimas s&#227;o iguais &#224;queles j&#225; comentados para as estatinas.<sup>16</sup></p>
  </body>
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