From April, 1984 to January, 1985, 57 cases of cardiovascular surgeries were performed at Yeung Nam University Hospital consisting 31 cases of open heart surgery and 26 cases of ligating patent ductus arteriosus. Among 31 cases of open heart surgery, all cases are congenital acyanotic heart disease except a case of rheumatic aortic valvular heart diseases taken aortic valve replacement with Bjrk-Shiley 25mm. Only 2 cases of transient hemoglobinuria were complicated. A case of surgical mortality was present died of acute respiratory failure and intractable arrhythmia, which resulting 3.2% of mortality rate.