UNUSUAL FEATURES OF RIGHT AND LEFT IDIOPATHIC VENTRICULAR-TACHYCARDIAABOLISHED BY RADIOFREQUENCY CATHETER ABLATION

Two unusual cases are presented with idiopathic right and left ventric ular tachycardia (IVT) with intriguing clinical and electrophysiologic al characteristics. The first patient with a sustained IVT of right ve ntricular outflow tract origin, and an electrophysiological mechanism suggesting reentry, had been resuscitated from cardiac arrest. The sec ond patient had an IVT with a left bundle branch block morphology, whi ch originated from the basal-septal region of the left ventricle (left ventricular outflow tract tachycardia). Both patients were cured with radiofrequency catheter ablation, guided by endocardial activation se quence and pace mapping.