A total of 40 patients having a diagnosis of atherosclerotic coronary arterial disease were analysed on the operative outcomes according to variables as follows: 1] preoperative risk factors such as age, sex, CCS[Canadian Cardiovascular Society] functional class, type of angina, number of diseased vessel, presence of left main coronary artery stenosis, previous history of habitual smoking and presence of other medical diseases[diabetes mellitus, essential hypertension], 2] preoperative management such as intraveous infusion of nitroglycerine, preoperative IABP[intra-aortic balloon pump] support and whether the operation was scheduled as emergency or not, 3] intraoperative variables such as infusion method and composition of cardioplegic solutions, number of distal anastomosis , use of internal mammary artery, total cardiopulmonary bypass time and total cross clamp time. Complications included operative death in 12.5%, perioperative myocardial infarction in 25.0% and perioperative arrhythmia in 17.5%. Nineteen perioperative variables were analyzed to identify risk factors for these end points. For operative death, presence of left main coronary artery stenosis[p=0.056] and cardiopulmonary bypass time[p=0.029] were significant in the univariate analysis, but presence of left main coronary artery lesion[p=0.011, 2=6.45] and abscence of preoperative of IABP support[p=0.069, 2=3.30] were independent predictor in multivariate analysis [stepwise linear logistic regression].