2. LVEF >35% by any current standard evaluation technique (e.g.,) echocardiogram, MUGA, angiography). 2.1. Patients who have an LVEF between 30-35% and NYHA Class I heart failure who do not have history of ventricular tachyarrhythmias,or inducible ventricular tachycardia during electrophysiological (EP) testing can be enrolled.