The patient has severe, refractory heart failure despite optimal medical management and/or device therapy (e.g. implantable cardioverter defibrillator or biventricular pacemaker).

Progressive ventricular dysfunction

Severe hypertensive or viral cardiomyopathy

Congenital heart disease that cannot be repaired

The patient's heart failure symptoms are well-controlled with medication and lifestyle changes.

The patient is experiencing mild, stable symptoms of heart failure with no evidence of arrhythmias or other complications.