The most common site of origin of idiopathic ventricular tachycardia (VT) is the right ventricular outflow tract. Idiopathic VT also can arise from the left ventricular outflow tract and the surrounding structures. Morphologic descriptions of 12-lead ECG characteristics of the aortic cusp region are limited.
Cardiovascular Division, Section of Electrophysiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. david.lin@uphs.upenn.edu
