Refractory ventricular tachycardia requiring radiofrequency ablation following surgical closure of ventricular septal defect: A rare occurrence. - Saha, Sayantika; Mukherjee, Satarupa; Mandal, Subhendu; Roychowdhuri, Kuntal; Sarkar, Rakesh; Daga, Manoj Kumar (Annals of Pediatric Cardiology, 2026)