[Implantation of a biventricular pacing system via a persistent left-sided superior vena cava].

Cardiac resynchronization therapy by multisite biventricular pacing presents an additive therapeutic option in the treatment of severe heart failure. Biventricular pacemaker implantation is challenging in patients with persistent left superior vena cava. We describe in this case report the implantation of a biventricular pacemaker using a left-sided approach in a patient with persistent left superior vena cava.