Right-sided implantation of a cardiac resynchronization therapy defibrillator in a case of persistent left superior vena cava.

Persistent left superior vena cava represents a congenital venous anomaly that poses a particular obstacle to the implantation of cardiac rhythm management devices. In the present report we briefly describe the rightsided implantation of a biventricular defibrillator in a patient with persistent left superior vena cava. We also briefly discuss the technically challenging procedures applied in such cases.