Indications

Sudden cardiac death or cardiac arrest

Drug-refractory VT

VF/VT with hemodynamic compromise

Younger age of onset (less than 35 years)

Left ventricular involvement

Medication intolerance/noncompliance

Contraindications

Frequent tachyarrhythmias (i.e., sustained VF/VT) not responsive to pacing or anti-arrhythmic medications

VF/VT with a reversible trigger

Terminal illness

Life expectancy of less than six months