influências temporais nas características e fatores de risco de pacientes submetidos a revascularização miocárdica the influence of time on the characteristics and risk factors for patients submitted to myocardial revascularization

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ID: 192649
2006
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Abstract
OBJETIVO: Comparar perfil clínico e cirúrgico entre dois grupos de pacientes submetidos a Cirurgia de Revascularização Miocárdica (CRM) no Instituto de Cardiologia do Rio Grande do Sul, com intervalo de 10 anos; observar sua influência na mortalidade hospitalar e verificar previsibilidade deste resultado mediante escore de risco. MÉTODOS: Estudo de coorte retrospectivo, envolvendo 307 pacientes submetidos a CRM isolada em período semestral de 1991/92 (grupo INICIAL, n=153) ou 2001/02 (grupo ATUAL, n=154). Foram analisados características demográficas, doenças cardíacas, co-morbidades e eventos operatórios, visando à comparação entre grupos e definição do escore de risco de morte hospitalar (conforme Cleveland Clinic). RESULTADOS: O grupo ATUAL tinha idade mais avançada, condição cardíaca mais grave (classe funcional, prevalência de insuficiência cardíaca e número de vasos com lesão severa) e maior prevalência de co-morbidades. Os pacientes iniciais mostraram maior prevalência na indicação cirúrgica de urgência. Não ocorreu diferença no escore médio de risco calculado para ambos os grupos (2,8 + 3,1 no INICIAL e 2,2 + 2,5 no ATUAL) ou na mortalidade hospitalar (respectivamente 3,3% e 1,9%), valores comparáveis com os comunicados pela Cleveland Clinic (para escore de risco 3, mortalidade prevista de 2,0 %, com limite de confiança 95% de 0-4,3% e mortalidade real em estudo de confirmação de 3,4%). CONCLUSÃO: Pacientes atualmente submetidos a CRM são mais idosos e em pior condição clínica (cardíaca e sistêmica) que os operados há 10 anos, mas a pontuação no escore de risco e a mortalidade hospitalar foram discretamente aumentadas no grupo inicial. Para isto, pode ter contribuído maior prevalência de cirurgias de urgência. Um escore de risco pode ser utilizado para identificar pacientes que requerem maiores cuidados e predizer o resultado cirúrgico.
OBJECTIVE: To compare clinical and surgical and clinical profiles of two group of patients submitted to Coronary Artery Bypass Graft (CABG) at Instituto de Cardiologia do RGS within a decade interval, define related hospital mortality and to validate a severity risk score for this populations. METHODS: Retrospective cohort study, including 307 CABG patients operated during six months of 1991/92 (n=153) and 2001/02 (n=154). Demographic characteristics, heart disease severity, co-morbidities and pre-operative events were evaluated and compared between groups. Hospital mortality and severity risk scores for mortality according to Cleveland Clinic were also assessed. RESULTS: Patients operated in 2001/02 were older, had more severe cardiac disease (increased NYHA functional class, prevalence of heart failure, and distribution of coronary diseased) and presented more co-morbidities than those operated in 1991/92. This patients required urgent surgery more often. The mean Cleveland Clinic severity risk score wasn't different between groups (2.8 + 3.1 in 1991/92 and 2.2 + 2.5 in 2001/02) and hospital mortality didn't present significant difference (3.3% and 1.9%, respectively). For Cleveland Clinic score 3 the predicted mortality was estimated as 2.0% (with confidence limit 95% of 0- 4.3%) and observed mortality for surgical patients of this institution was 3.4%. CONCLUSION: Patients submitted to CABG currently are older and in worse clinical conditions than those operated 10 years ago, but severity risk scores and hospital mortality were discretely increased for initial series of patients. This may be a consequent of a higher prevalence of urgent surgical indication in those patients. A severity risk score for hospital mortality can be used to predict surgical result and identify patients requiring specific care.
Reference Key
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Authors ;Flávia H. Feier;Roberto T. Sant'Anna;Eduardo Garcia;Felipe de Bacco;Edemar Pereira;Marisa Santos;Altamiro Reis da Costa;Ivo A. Nesralla;João Ricardo M. Sant'Anna
Journal revista cubana de ciencias informáticas
Year 2006
DOI
10.1590/S0066-782X2006001700007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2006001700007
Keywords
myocardial revascularization

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