PROGNOSTIC FACTORS FOR PERIOPERATIVE MYOCARDIAL INFARCTION AND IMMEDIATE MORTALITY IN PATIENTS WHO UNDERWENT CORONARY ARTERY BYPASS GRAFT SURGERY

摘要

Introduction: Coronary artery bypass surgery is one of the mainstays of treat-ment in ischemic heart disease.Objective: To identify factors that influence the occurrence of perioperative myo-cardial infarction and early cardiac mortality in patients who underwent coronary artery bypass graft surgery.Method: A prospective cohort study was performed at the Department of Cardio-vascular Surgery, “Cardiocentro del Hospital Clínico Quirúrgico Hermanos Amei-jeiras” from March 2012 to August 2014. The sample consisted of 231 consecutive patients who met the inclusion criteria. The response variables were: sudden car-diac death early cardiac mortality and acute perioperative myocardial infarction.Results: Age, body mass index, prolonged surgical time (p=0.023) and compli-cations (p=0.009) were the variables independently associated with the occur-rence of perioperative infarction. Odds ratio, adjusted for age and body mass in-dex were lower than 1. According to adjusted odds ratio, variables of most influ-ence on mortality were the presence of complications (3.753; p=0.017), prolonged surgical time (2.690; p=0.002) and low preoperative glomerular filtration rate (2.112; p=0.036).Conclusions: Older age and higher body mass index were protective prognostic factors for perioperative acute myocardial infarction events. Prolonged surgical time and complications were independently associated with perioperative infarc-tion and mortality after coronary artery bypass graft surgery. Low preoperative glomerular filtration rate was also associated with mortality.