Permanent pacing to increase the basal ventricular rate and to prevent post-extrasystolic pauses may reduce the probability of recurrent TdeP VT An implantable cardioverter-defibrillator (ICD) is indicated in patients who have been resuscitated after cardiac arrest and in those who have cardiac syncope despite therapy with a beta-blocker (see table Indications for Implantable Cardioverter-Defibrillators in Ventricular Tachycardia and Ventricular Fibrillation).