Sixty-three patients of postinfarction left ventricular aneurysm (26 surgical cases and 37 medical cases) were analysed in the left ventricular performance, the survival rate, and the subjective complaints. In the surgical cases, the left ventricular performance improved significantly, but no significant changes were noted in the medical cases. The left ventricular function curves were inclined toward the upper left direction in the surgical cases. Whereas in the medical cases they were declined toward the lower right direction. No cardiac death occurred among the surgical cases, but it occurred in 8 patients, or 21.6% in the medical cases. Five year cumulative survival rate was 95.7% and adjusted survival rate was 100% in the surgical cases, but in the medical cases it was 80.7% and 86.8%, respectively.