Clinical Implications of Persistence of Left Sided Superior Vena Cava

Persistent left superior vena cava (PLSVC) is a rare congenital vascular anomaly It is usually asymptomatic and found incidentally during imaging or identified while obtaining a vascular access for placing pacemakers Recently, it has been identified as a focus for Atrial fibrillation (AF) origin It is a congenital remnant of left sided pacemaker tissue, which can be visualized on a TTE have been identified to be the cause of refractory AF.