Residual ventricular septal defect after surgical repair for tetralogy of Fallot can occasionally be hemodynamically important requiring re-intervention. Transcatheter closure using ventricular septal defect devices is an attractive option for such defects. We describe two such cases where the Amplatzer duct occluder was used as an innovative, less costly alternative for closure of residual membranous ventricular septal defects. Complete occlusion of the residual ventricular septal defect with significant symptomatic improvement could be accomplished in both patients.