Management of congenital heart defects was considered primarily a surgical domain till some 20 years ago. The last two decades have witnessed an explosion in catheter-based therapeutics. Interventional cardiology has replaced surgery for number of defects. In addition, it provides an additional and complementary treatment to surgery in many conditions. Invention of stents to keep the dilated vessels open and development of occlusive devices for closing cardiac defects further expanded the role of pediatric interventional cardiologists. Pediatric cardiac interventions can be broadly classified into two groups: Dilatations of abnormally closed vessel or stenosed valves and Occlusions of abnormally open channels and defects. There is a third arm of interventions called interventional electrophysiology that deals with pacemaker implantations of bradyarrhythmias and radio-frequency ablations of tachyarrhythmias. Interventions involving dilatations are valvuloplasties for stenotic lesions and dilatation of vascular obstructions like coarctation of aorta, branch pulmonary artery stenosis, postoperative obstructed systemic and pulmonary venous baffles and arterial conduits and also balloon atrial septostomy. Device closure of ASD, VSD and PDA have good procedural and long term success rate. Infrequent procedures are closure of ruptured sinus of Valsalva aneurysm, perforation of atretic tricuspid/pulmonary valves by radio-frequency ablation, use of stents to maintain ductal patency in duct dependent lesions, relief of obstruction in TAPVC, nonsurgical staged Fontan procedure and in preparing for a future definitive surgery. Percutaneous repair and replacement of cardiac valves have been tried with encouraging results.