OBJECTIVE: To evaluate which preoperative and trans-operative variables are predictors for the occurrence of myocardial infarction in the perioperative period of surgical myocardial revascularization in a general hospital in Porto Alegre, Brazil. METHOD: A retrospective cohort study was made of the database of heart surgery in the Hospital São Lucas of the Pontifícia Universidade Católica in Rio Grande do Sul analyzing 1471 consecutive patients who underwent on-pump surgical myocardial revascularization from January 1998 to December 2002. RESULTS: Fourteen percent of the patients presented with perioperative myocardial infarction. The variables that proved to be independent predictors of perioperative myocardial infarction in surgical myocardial revascularization in this study were: prior surgical myocardial revascularization (OR: 2.070 - p=0.036), left main coronary artery lesion (OR: 1.692 - p=0.006), female (OR: 1.572 - p=0.034), preoperative unstable angina (OR: 1.533 - p=0.011), high number of grafts (OR: 1.336 - p=0.001) and prolonged cardiopulmonary bypass time (OR: 1.013 - p<0.001). CONCLUSIONS: Prior surgical myocardial revascularization, left main coronary artery lesion, female, preoperative unstable angina, high number of grafts and prolonged cardiopulmonary bypass time proved to be independent predictors of perioperative myocardial infarction in surgical myocardial revascularization in this study of patients from a general hospital from Porto Alegre, Brazil.
Myocardial infarction; Myocardial revascularization; Risk assessment; Coronary disease
