Perventricular device closure of isolated mVSD appears feasible option at mid-term follow-up and may either substitute or complement the conventional surgical technique in selected cases depending on institutional paediatric cardiac surgery performance.

Follow-up angiography revealed a high incidence of parent artery occlusion when the fistula was arising from the native artery and not from one of its branches. Coronary artery fistula intervention of the parent coronary artery fistula always carries the potential risk of ischaemia, unless the distal-most exiting segment is the primary site of occlusion.

In our patient population, transcatheter device closure of the perimembranous ventricular septal defect with prophylactic oral steroid resulted in excellent closure rate and acceptably low incidence of conduction disturbances at mid-term follow-up.

Single coronary artery is an uncommon variation of the coronary circulation. After transposition of great arteries, coronary artery fistulas are the most common associated cardiac anomalies in these patients. Transcatheter closure of coronary artery fistula (CAF) involving single coronary artery is a challenging intervention. In the absence of contralateral coronary artery, a complex anatomy of the CAF and a large myocardial perfusion territory of the dominant circulation pose an additional risk during interventional procedure. We report our experience of a successful transcatheter closure of a coronary artery fistula in a patient with single coronary artery.