The anatomy on surgery showed 57 cases (80.5%) of perimembranous VSD, 12 cases (18%) of outlet VSD; 1 case (1.4%) of inlet VSD; 1 case of (1.4%) trabecular VSD and 1 case (1.4%) of multiple muscular VSD. The mean diameter of VSD was 9.5 mm (2 - 20 mm).