From 1 / 2000 to 12 / 2002 in the Cardiovascular and Thoracic Surgery Department of Cho Ray Hospital we operated 58 cases of Ventricular Septal Defect (12, 07%), Atrial Septal Defect (63, 79%), Patent Ductus Arteriosus (22, 42%), Tetralogy of Fallot (1, 72%).