Radiofrequency catheter ablation of a left lateral accessory pathway in a patient with persistent left superior vena cava.

Persistent left superior vena cava is an unusual congenital anomaly that can coexist with accessory atrioventricular pathways. This anomaly can cause difficulty in mapping because of the dilated coronary sinus. This study describes a successful catheter ablation in a young male with persistent left superior vena cava and Wolff-Parkinson-White Syndrome as a result of a left lateral accessory pathway.