Left-sided biventricular pacemaker implantation in the presence of persistent left superior vena cava.

Persistent Left Superior Vena Cava (PLSVC) is the most common thoracic venous anomaly encountered during device implantation. The most common problems related to the unusual anatomic access to the heart are reaching a convenient pacing site and ensuring stable lead placement. This report describes left sided implantation of RA, RV and LV leads in a patient with a PLSVC who was referred for cardiac resynchronizaiton therapy. The literature regarding the interventional approach for device implantation in patients with PLSVC is reviewed.