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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">zMrTsLhSfybkZXrrpdqjTXz</article-id>
      <article-id pub-id-type="other">00004</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X1997000900004</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v1">S0066-782X(97)06900304</article-id>
      <article-id pub-id-type="doi">10.1590/S0066-782X1997000900004</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Artigos Originais</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Tratamento medicamentoso da doen&#231;a arterial coron&#225;ria est&#225;vel em centros de atendimento prim&#225;rio e terci&#225;rio</article-title>
        <trans-title-group xml:lang="en">
          <trans-title>Clinical therapeutics for stable coronary artery disease. Differences between primary and tertiary medical care centers</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Mansur</surname>
            <given-names>Ant&#244;nio P.</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Gomes</surname>
            <given-names>Everli P. S. Gon&#231;alves</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Favarato</surname>
            <given-names>Desid&#233;rio</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Raineri</surname>
            <given-names>Angela</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Martins</surname>
            <given-names>Jos&#233; Renato M.</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ramires</surname>
            <given-names>Jos&#233; A. F.</given-names>
          </name>
          <xref ref-type="aff" rid="aff01"/>
        </contrib>
      </contrib-group>
      <aff id="aff01">
        <addr-line>
          <named-content content-type="city">S&#227;o Paulo</named-content>
          <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">Faculdade de Medicina </institution>
        <institution content-type="orgdiv2">Hospital das Cl&#237;nicas</institution>
        <country country="BR">Brazil</country>
      </aff>
      <pub-date date-type="collection" publication-format="electronic">
        <month>09</month>
        <year>1997</year>
      </pub-date>
      <volume>69</volume>
      <issue>3</issue>
      <fpage>165</fpage>
      <lpage>168</lpage>
      <history>
        <date date-type="received">
          <day>16</day>
          <month>05</month>
          <year>1997</year>
        </date>
        <date date-type="accepted">
          <day>02</day>
          <month>07</month>
          <year>1997</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>
      <abstract>
        <p>OBJETIVO: Observar a distribui&#231;&#227;o das drogas em pacientes com doen&#231;a arterial coron&#225;ria (DAC) est&#225;vel, em centros de atendimento (CA) prim&#225;rio e terci&#225;rio. M&#201;TODOS: Foram analisados, 300 pacientes, consecutivos, no ambulat&#243;rio do Grupo de Coronariopatias do INCOR com diagn&#243;stico de DAC, idades entre 31 a 80 (58,5&#177;8,0) anos, sendo 205 (68%) do sexo masculino e 95 (32%) do feminino e estudadas as caracter&#237;sticas cl&#237;nicas e hemodin&#226;micas. Avaliaram-se as drogas utilizadas, inicialmente, nos CA prim&#225;rios (comunit&#225;rios) e, posteriormente, no CA terci&#225;rio. RESULTADOS: As drogas mais utilizadas nos CA prim&#225;rios foram os b-bloqueadores (50% dos pacientes), nitratos (48%), bloqueadores dos canais de c&#225;lcio (46%), &#225;cido acetil-salic&#237;lico (44%), diur&#233;ticos (30%) e os inibidores da enzima de convers&#227;o de angiotensina (ECA), em 11% dos pacientes. No CA terci&#225;rio as drogas mais utilizadas foram o &#225;cido acetil-salic&#237;lico (76% dos casos), nitratos (55%), diur&#233;ticos (49%), inibidores da ECA (42%), os antagonistas dos canais de c&#225;lcio (37%) e os betabloqueadores (35% dos pacientes). Os b-bloqueadores foram mais prescritos em CA prim&#225;rio, p= 0,02, j&#225; os inibidores da ECA, p&lt;0,0001, o &#225;cido acetil-salic&#237;lico, p&lt;0,0001 e os diur&#233;ticos, p= 0,002, foram mais prescritos no CA terci&#225;rio. CONCLUS&#195;O: O tratamento farmacol&#243;gico preconizado para a DAC est&#225;vel deve ser otimizado em ambos os CA, dando prioridade &#224;s drogas que modificam a hist&#243;ria natural da doen&#231;a, como os betabloqueadores, antiagregantes plaquet&#225;rios, e os inibidores da ECA nos pacientes com disfun&#231;&#227;o ventricular esquerda.</p>
      </abstract>
      <trans-abstract xml:lang="en">
        <p>PURPOSE: To observe the distribution of the main drugs used in patients with stable coronary heart disease, in primary and tertiary medical care centers (MCC). METHODS: We studied 300 consecutive out patients at the Hetat Institute with the diagnosis of stable coronary artery disease, 205 (68%) males and 95 (32%) female, aged from 31 to 80 (mean 58&#177;8.0) years old. Drug intake was evaluated. RESULTS: We observed that the use of nitrates (48% vs 55%; p=NS) and calcium antagonists (46% vs 37%; p=NS), respectively in both primary and tertiary MCC was similar. The beta blockers were used more often in the primary MCC (50% vs 35%; p= 0,02). Angiotensin coverting enzyme inhibitors (11% vs 42%; p&lt; 0.001), diuretics (30% vs 49%; p= 0.002) and aspirin (44% vs 76%; p= 0.0001) were more frequently used in the tertiary MCC. CONCLUSION: We observed similar frequency of use of nitrates and calcium antagonists in both centers. There was a higher use of beta blockers in primary MCC. The angiotensin coverting enzyme inhibitors and antiplatelet agents were more used in the tertiary MCC. In relation to the updated literature, the best pharmacotherapy to coronary artery disease should be optimized in both centers.</p>
      </trans-abstract>
      <kwd-group xml:lang="en" kwd-group-type="author-generated">
        <kwd>coronary atherosclerosis</kwd>
        <kwd>medical therapeutics</kwd>
        <kwd>community and reference medical centers</kwd>
      </kwd-group>
      <kwd-group xml:lang="pt" kwd-group-type="author-generated">
        <kwd>aterosclerose coron&#225;ria</kwd>
        <kwd>terap&#234;utica cl&#237;nica</kwd>
        <kwd>centros m&#233;dicos prim&#225;rios e terci&#225;rios</kwd>
      </kwd-group>
      <pub-date publication-format="electronic" date-type="pub">
        <day>09</day>
        <month>02</month>
        <year>2001</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <p>Artigo Original </p>
    <p>
      <bold>Tratamento Medicamentoso da Doen&#231;a Arterial Coron&#225;ria Est&#225;vel em Centros de Atendimento Prim&#225;rio e Terci&#225;rio</bold>
    </p>
    <p>Ant&#244;nio P. Mansur, Everli P. S. Gon&#231;alves Gomes, Desid&#233;rio Favarato, Angela Raineri, Jos&#233; Renato M. Martins, Jos&#233; A. F. Ramires </p>
    <p>
      <bold>S&#227;o Paulo, SP </bold>
    </p>
    <p><bold><italic>OBJETIVO: </italic></bold>Observar a distribui&#231;&#227;o das drogas em pacientes com doen&#231;a arterial coron&#225;ria (DAC) est&#225;vel, em centros de atendimento (CA) prim&#225;rio e terci&#225;rio. </p>
    <p><bold><italic>M&#201;TODOS: </italic></bold>Foram analisados, 300 pacientes, consecutivos, no ambulat&#243;rio do Grupo de Coronariopatias do INCOR com diagn&#243;stico de DAC, idades entre 31 a 80 (58,5&#177;8,0) anos, sendo 205 (68%) do sexo masculino e 95 (32%) do feminino e estudadas as caracter&#237;sticas cl&#237;nicas e hemodin&#226;micas. Avaliaram-se as drogas utilizadas, inicialmente, nos CA prim&#225;rios (comunit&#225;rios) e, posteriormente, no CA terci&#225;rio. </p>
    <p><bold><italic>RESULTADOS: </italic></bold>As drogas mais utilizadas nos CA prim&#225;rios foram os b-bloqueadores (50% dos pacientes), nitratos (48%), bloqueadores dos canais de c&#225;lcio (46%), &#225;cido acetil-salic&#237;lico (44%), diur&#233;ticos (30%) e os inibidores da enzima de convers&#227;o de angiotensina (ECA), em 11% dos pacientes. No CA terci&#225;rio as drogas mais utilizadas foram o &#225;cido acetil-salic&#237;lico (76% dos casos), nitratos (55%), diur&#233;ticos (49%), inibidores da ECA (42%), os antagonistas dos canais de c&#225;lcio (37%) e os betabloqueadores (35% dos pacientes). Os b-bloqueadores foram mais prescritos em CA prim&#225;rio, p= 0,02, j&#225; os inibidores da ECA, p&lt;0,0001, o &#225;cido acetil-salic&#237;lico, p&lt;0,0001 e os diur&#233;ticos, p= 0,002, foram mais prescritos no CA terci&#225;rio. </p>
    <p><bold><italic>CONCLUS&#195;O: </italic></bold>O tratamento farmacol&#243;gico preconizado para a DAC est&#225;vel deve ser otimizado em ambos os CA, dando prioridade &#224;s drogas que modificam a hist&#243;ria natural da doen&#231;a, como os betabloqueadores, antiagregantes plaquet&#225;rios, e os inibidores da ECA nos pacientes com disfun&#231;&#227;o ventricular esquerda. </p>
    <p><bold>Palavras-chave: </bold>aterosclerose coron&#225;ria, terap&#234;utica cl&#237;nica, centros m&#233;dicos prim&#225;rios e terci&#225;rios </p>
    <p>
      <bold>Clinical Therapeutics for Stable Coronary Artery Disease. Differences between Primary and Tertiary Medical Care Centers </bold>
    </p>
    <p><bold><italic>PURPOSE: </italic></bold>To observe the distribution of the main drugs used in patients with stable coronary heart disease, in primary and tertiary medical care centers (MCC). </p>
    <p><bold><italic>METHODS: </italic></bold>We studied 300 consecutive out patients at the Hetat Institute with the diagnosis of stable coronary artery disease, 205 (68%) males and 95 (32%) female, aged from 31 to 80 (mean 58&#177;8.0) years old. Drug intake was evaluated. </p>
    <p><bold><italic>RESULTS: </italic></bold>We observed that the use of nitrates (48% vs 55%; p=NS) and calcium antagonists (46% vs 37%; p=NS), respectively in both primary and tertiary MCC was similar. The beta blockers were used more often in the primary MCC (50% vs 35%; p= 0,02). Angiotensin coverting enzyme inhibitors (11% vs 42%; p&lt; 0.001), diuretics (30% vs 49%; p= 0.002) and aspirin (44% vs 76%; p= 0.0001) were more frequently used in the tertiary MCC. </p>
    <p><bold><italic>CONCLUSION: </italic></bold>We observed similar frequency of use of nitrates and calcium antagonists in both centers. There was a higher use of beta blockers in primary MCC. The angiotensin coverting enzyme inhibitors and antiplatelet agents were more used in the tertiary MCC. In relation to the updated literature, the best pharmacotherapy to coronary artery disease should be optimized in both centers.  </p>
    <p><bold>Key-words: </bold>coronary atherosclerosis, medical therapeutics, community and reference medical centers </p>
    <p>A doen&#231;a arterial coron&#225;ria (DAC) continua sendo a principal causa de &#243;bitos nas regi&#245;es mais desenvolvidas do Brasil, apesar de apresentar o mesmo decl&#237;nio na incid&#234;ncia, observado nos pa&#237;ses mais desenvolvidos <sup>1-3</sup>. A redu&#231;&#227;o na mortalidade foi resultado de altera&#231;&#245;es no estilo de vida, controle dos fatores de risco e aos conhecimentos mais precisos sobre a fisiopatologia da DAC <sup>3,4</sup>. Esses conhecimentos t&#234;m sido de grande import&#226;ncia no aprimoramento dos m&#233;todos diagn&#243;sticos e das v&#225;rias formas de tratamento, n&#227;o invasivo ou invasivo. Observou-se tamb&#233;m melhoria no tratamento farmacol&#243;gico com a introdu&#231;&#227;o de novas drogas <sup>4,5</sup>. Contudo, estudos recentes v&#234;m mostrando que determinadas drogas adaptam-se melhor a subgrupos espec&#237;ficos de pacientes <sup>6-10</sup>. Este estudo teve como objetivo analisar o perfil do tratamento farmacol&#243;gico atual em centros m&#233;dicos de atendimento (CA) prim&#225;rio e terci&#225;rio na DAC est&#225;vel, em um mesmo grupo de pacientes. </p>
    <p>M&#233;todos </p>
    <p>Foram estudados 300 pacientes consecutivos, do Grupo de Coronariopatias do INCOR do Hospital das Cl&#237;nicas da FMUSP, portadores de DAC est&#225;vel, isto &#233;, sem hist&#243;ria de infarto ou angina inst&#225;vel nos seis meses anteriores e sintomas est&#225;veis por mais de tr&#234;s meses. A presen&#231;a de DAC foi caracterizada por um ou mais dos seguintes crit&#233;rios: cinecoronariografia que revelasse pelo menos uma les&#227;o cr&#237;tica, com diminui&#231;&#227;o do di&#226;metro luminal <underline>&gt;</underline>70% , infarto antigo do mioc&#225;rdio (ondas Q, de dura&#231;&#227;o <underline>&gt;</underline>0,03s ou correspondendo a 2/3 do complexo QRS, em eletrocardiograma (ECG) de repouso), e/ou isquemia transit&#243;ria no ECG de esfor&#231;o. Foram tamb&#233;m avaliadas as caracter&#237;sticas cl&#237;nicas, a fra&#231;&#227;o de eje&#231;&#227;o do ventr&#237;culo esquerdo (FEVE) no ecocardiograma (ECO), no modo M e a presen&#231;a dos principais fatores de risco, como a hipertens&#227;o arterial sist&#234;mica (HAS) (press&#227;o diast&#243;lica &gt;90mmHg) <sup>11</sup>, diabetes mellitus (glicemia de jejum <underline>&gt;</underline>140mg/dL), dislipidemia (colesterol total <underline>&gt;</underline>240mg/dL e/ou LDL colesterol <underline>&gt;</underline>130mg/dL) <sup>12</sup>, tabagismo e antecedentes familiares. O estudo analisou para os mesmos pacientes, o perfil farmacol&#243;gico das drogas utilizadas em CA prim&#225;rio e, posteriormente quando em tratamento no CA terci&#225;rio (INCOR). </p>
    <p>Resultados </p>
    <p>As caracter&#237;sticas cl&#237;nicas da popula&#231;&#227;o encontram-se na <xref ref-type="table" rid="tabela1">tabela I</xref>. A FEVE e as caracter&#237;sticas hemodin&#226;micas e coronariogr&#225;ficas encontram-se na <xref ref-type="table" rid="tabela2">tabela II</xref>. Os fatores de risco mais prevalentes foram a HAS em 198 (66%) pacientes e o tabagismo em 114 (38%). Infarto antigo do mioc&#225;rdio foi diagnosticado em 201 (67%), a revasculariza&#231;&#227;o do mioc&#225;rdio em 87 (29%) e a angioplastia coron&#225;ria em 15 (5%) dos pacientes. Observamos a utiliza&#231;&#227;o dos nitratos (48% vs 55%; p=NS) e bloqueadores dos canais de c&#225;lcio (46% vs 37%; p=NS) em ambos os CA. </p>
    <table-wrap id="tabela1">
      <graphic xlink:href="1678-4170-abc-69-03-0165-00004-gt01.jpg"/></table-wrap>
    <table-wrap id="tabela2">
      <graphic xlink:href="1678-4170-abc-69-03-0165-00004-gt02.jpg"/></table-wrap>
    <p>Os betabloqueadores foram mais utilizados nos CA prim&#225;rio (50% vs 35%; p=0,02). Os diur&#233;ticos (30% vs 49%; p=0,002) e o &#225;cido acetil-salic&#237;lico (44% vs 76%; p&lt; 0,0001) foram as drogas mais utilizadas nos CA terci&#225;rio. Apesar da alta preval&#234;ncia de dislipidemia na popula&#231;&#227;o analisada, somente quatro (1%) dos pacientes nos CA prim&#225;rio e 19 (6%) no terci&#225;rio foram tratados com hipolipemiantes orais. Os inibidores da enzima de convers&#227;o da angiotensina (ECA) (11% vs 42%; p&lt;0,0001) foram mais utilizados no CA terci&#225;rio. O uso de digital (10% nos dois tipos de CA) e de antiarr&#237;tmicos (3% vs 5%; p=NS) foram semelhantes para ambos os centros (<xref ref-type="table" rid="tabela3">tab. III</xref>). </p>
    <table-wrap id="tabela3">
      <graphic xlink:href="1678-4170-abc-69-03-0165-00004-gt03.jpg"/></table-wrap>
    <p>Discuss&#227;o </p>
    <p>Na d&#233;cada de 70, o tratamento farmacol&#243;gico da DAC est&#225;vel fundamentava-se no uso de tr&#234;s classes de drogas: os nitratos, os betabloqueadores e os antiagregantes plaquet&#225;rios. </p>
    <p>Estudos mais recentes, melhores elaborados e de metan&#225;lise demonstraram que os betabloqueadores, atrav&#233;s da redu&#231;&#227;o do reinfarto e da morte s&#250;bita <sup>6,10,13</sup>, e os antiagregantes plaquet&#225;rios, em especial o &#225;cido acetil-salic&#237;lico e a ticlopidina, modificam a hist&#243;ria natural da DAC <sup>14-16</sup>. Outro antiagregante plaquet&#225;rio, o dipiridamol, apesar do evidente efeito <italic>in-vitro</italic>, mostrou-se ineficaz<italic> in-vivo</italic> no tratamento da DAC. </p>
    <p>No in&#237;cio da d&#233;cada de 80, novas drogas, em especial os bloqueadores dos canais de c&#225;lcio e os inibidores da ECA, foram introduzidos em subgrupos espec&#237;ficos de pacientes com DAC. Os inibidores da ECA foram, inicialmente, indicados no tratamento da miocardiopatia isqu&#234;mica com sintomas de acentuada disfun&#231;&#227;o ventricular esquerda <sup>17</sup>. Posteriormente, a indica&#231;&#227;o foi estendida para outros subgrupos de pacientes, como, por exemplo, aqueles com disfun&#231;&#227;o ventricular esquerda ainda assintom&#225;ticos <sup>18</sup> e para portadores de aneurisma de ventr&#237;culo esquerdo (VE) por infarto da parede anterior do VE <sup>19</sup>. Estas indica&#231;&#245;es ocorreram ap&#243;s estudos detalhados, onde observou-se redu&#231;&#227;o significativa da morbidade e mortalidade por DAC <sup>20</sup>. </p>
    <p>O mesmo n&#227;o ocorreu com o uso dos bloqueadores dos canais de c&#225;lcio. Inicialmente, preconizados como os vasodilatadores de escolha para o espasmo coron&#225;rio <sup>7</sup>, o seu uso generalizou-se para todas as s&#237;ndromes isqu&#234;micas <sup>8,9</sup>. Recentemente, por&#233;m, d&#250;vidas foram sendo levantadas sobre a efic&#225;cia desse grupo de drogas no tratamento da DAC <sup>21-23</sup>. A utiliza&#231;&#227;o destas novas drogas fez com que as anteriormente utilizadas fossem cada vez menos prescritas. </p>
    <p>No nosso estudo houve diferen&#231;a na prescri&#231;&#227;o de drogas, os betabloqueadores foram mais utilizados no CA prim&#225;rio e os nitratos, bloqueadores dos canais de c&#225;lcio, inibidores da ECA e antiagregantes plaquet&#225;rios no CA terci&#225;rio. Essa diferen&#231;a pode ser devida ao melhor conhecimento do estado funcional do VE, pelo uso mais intensivo de m&#233;todos invasivos ou n&#227;o invasivos no CA terci&#225;rio. </p>
    <p>O maior uso de nitratos pode se dever ao fato de que apesar de n&#227;o modificarem a hist&#243;ria da DAC, melhoram a qualidade de vida e o desempenho f&#237;sico do paciente <sup>16</sup>. Os inibidores da ECA deveram seu uso elevado &#224; preval&#234;ncia de disfun&#231;&#227;o ventricular esquerda (43% dos pacientes com FEVE, avaliada por ECO &lt;60) e grande preval&#234;ncia de infarto do mioc&#225;rdio da parede anterior do ventr&#237;culo associado ou n&#227;o a presen&#231;a de aneurisma do VE. </p>
    <p>Os bloqueadores dos canais de c&#225;lcio, drogas utilizadas com freq&#252;&#234;ncia em ambos CA, s&#227;o vasodilatadores com caracter&#237;sticas inotr&#243;picas e cronotr&#243;picas negativas, pareciam ser a droga ideal para o tratamento da DAC, por&#233;m, os estudos de metan&#225;lise mostraram que estavam associados a maior mortalidade, n&#227;o justificando atualmente seu uso de forma indiscriminada <sup>21-23</sup>. </p>
    <p>Nos CA prim&#225;rio a maior utiliza&#231;&#227;o dos betabloqueadores pode ser justificada, basicamente, de duas maneiras: 1&#170;, por sua efic&#225;cia na redu&#231;&#227;o do reinfarto e da morte s&#250;bita <sup>6</sup>, e 2&#186;, por serem drogas de, relativamente, baixo custo, o que favorece maior ader&#234;ncia ao tratamento. Os efeitos adversos dos betabloqueadores no perfil lip&#237;dico e o seu uso em portadores de diabetes mellitus s&#227;o argumentos freq&#252;entes para a sua n&#227;o utiliza&#231;&#227;o de rotina nos portadores de DAC associada a essas doen&#231;as. A a&#231;&#227;o dos betabloqueadores no perfil lip&#237;dico refere-se a pequenos aumentos nos n&#237;veis de triglic&#233;rides e diminui&#231;&#227;o nos n&#237;veis de HDL colesterol <sup>24</sup>. Estas mudan&#231;as no metabolismo lip&#237;dico s&#227;o por&#233;m, compensadas pelos benef&#237;cios sobre a isquemia mioc&#225;rdica e, possivelmente, menores s&#227;o esses efeitos adversos com o uso de antagonistas beta-1 seletivos <sup>25</sup>. O efeito inibit&#243;rio dos betabloqueadores no desenvolvimento da aterosclerose foi demonstrado em volunt&#225;rios <sup>26</sup> e em estudos com animais de laborat&#243;rio <sup>27,28</sup>, atrav&#233;s da diminui&#231;&#227;o da afinidade das lipoprote&#237;nas de baixa densidade (LDL) aos proteoglicanos arteriais <sup>26</sup>, o que pode ser de particular import&#226;ncia, porque a intera&#231;&#227;o das lipoprote&#237;nas baixa densidade (LDL) com os proteoglicanos arteriais &#233; um importante mecanismo de ac&#250;mulo de l&#237;pides na placa ateroscler&#243;tica <sup>29</sup>. </p>
    <p>Sabe-se que a disfun&#231;&#227;o endotelial favorece o processo da aterog&#234;nese e da trombog&#234;nese. Os betabloqueadores tamb&#233;m estimulam o fator ativador tissular do plasminog&#234;nio, e, portanto, podem levar alguma prote&#231;&#227;o para o sistema arterial <sup>30</sup>. </p>
    <p>Nos diab&#233;ticos, os betabloqueadores podem inibir a glicogen&#243;lise e a mobiliza&#231;&#227;o da glicose, podendo assim prolongar um epis&#243;dio de hipoglicemia ou mesmo mascarar os sinais e sintomas de hipoglicemia <sup>25</sup>. </p>
    <p>Quanto &#224; utiliza&#231;&#227;o dos antiarr&#237;tmicos e digital , n&#227;o observamos diferen&#231;a significativa nos dois grupos de atendimento, provavelmente devido &#224;s caracter&#237;sticas da popula&#231;&#227;o estudada. </p>
    <p>&#201; de se ressaltar que apesar de 50% dos pacientes neste estudo serem portadores de dislipidemia, com n&#237;veis de colesterol s&#233;rico <underline>&gt;</underline>240mg/dL, somente 1,0% da popula&#231;&#227;o recebeu terap&#234;utica medicamentosa nos CA prim&#225;rio e apenas 6,0% no CA terci&#225;rio. Por ser a hipercolesterolemia fator de risco independente para DAC <sup>3,4</sup>, a redu&#231;&#227;o dos n&#237;veis s&#233;ricos do colesterol &#233; importante e pode estabilizar ou reduzir a progress&#227;o do processo de aterosclerose. </p>
    <p>Concluindo, o estudo revela que n&#227;o est&#225; havendo uso adequado do arsenal farmacol&#243;gico no tratamento de portadores de DAC. Mais esfor&#231;os deveriam ser dirigidos para melhorar o manejo desses pacientes. </p>
    <p>O uso da medicina baseada em evid&#234;ncias, talvez, ofere&#231;a tal efeito ao assegurar o uso de terap&#234;uticas testadas em grandes estudos randomizados e por metan&#225;lise cuidadosa. </p>
    <p>E, ainda, com freq&#252;&#234;ncia, o portador da DAC, apresenta dislipidemia como fator gerador e de progress&#227;o da doen&#231;a, fato que n&#227;o deve ser negligenciado, mesmo em situa&#231;&#245;es de constrangimento econ&#244;mico. </p>
    <p>Instituto do Cora&#231;&#227;o do Hospital das Cl&#237;nicas - FMUSP </p>
    <p> Correspond&#234;ncia: Antonio de P&#225;dua Mansur - InCor - Divis&#227;o de Cl&#237;nica - Av. Dr. En&#233;as C. Aguiar, 44 - 05403-000 - S&#227;o Paulo, SP </p>
    <p> Recebido para publica&#231;&#227;o em 16/5/97 </p>
    <p> Aceito em 2/7/97 </p>
  </body>
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