Over a period from July 1984 to June 1985, 39 cases of open heart surgery were done under cardiopulmonary bypass. There were 23 male and 16 female patients, ranging in age from 18 months to 58 years. Thirty cases were valvular disease. The most common of congenital heart disease is VSD. Among the 9 cases of acquired valvular diseae,1 MAP, 5 MVR, 2 MVR+TAP, and 1 MVR+AVR were done. There were 1 operative death[11%] which was done MVR+TAP. Operative mortality in 30 congenital heart disease was 7%; 1 death [5%] in 22 acyanotic and 1[13%] in 8 cyanotic cases. Finally, overall mortality for 39 cases was 8%; 7% for congenital heart disease and 11% for acquired heart disease.