Permanent pacing from a left ventricular vein in a patient with persistent left and absent right superior vena cava.

Persistent left superior vena cava with coexisting absent right superior vena cava is rare with less than 150 cases in the literature. Various techniques for pacemaker implantation have been described in this situation. We report a 40-year-old man with sinus and atrioventricular nodal dysfunction who underwent dual chamber pacemaker implantation. We elected to implant the ventricular electrode down a left ventricular branch of the coronary sinus and the lead is stable at 4-month follow-up.