Feasibility of Left Bundle Branch Area Pacing via a Persistent Left Superior Vena Cava in a Patient with Repaired Ventricular Septal Defect.

Persistent left superior vena cava (PLSVC) is the most common systemic venous anomaly and may complicate cardiac device implantation, particularly in patients with a history of congenital heart surgery. We report the case of a 16-year-old girl with a surgically repaired ventricular septal defect who developed complete heart block, necessitating conduction system pacing (CSP). This case highlights the feasibility of CSP in the presence of PLSVC and prior congenital heart surgery.