M. Other Indications
Prolonged QT interval syndromes may cause syncope or sudden death and beta-blockers provide some benefit in these patients. An electrical storm in the heart may precipitate multiple episodes of ventricular tachycardia or ventricular fibrillation and repetitive ventricular fibrillation resistant to therapy. The beneficial effect of the beta-blocker propranolol on recurrent ventricular fibrillation caused by electrocution was documented in 1970s, but little attention was given to this report. Recent studies have documented the role of beta-blockers in electrical storms and today propranolol is used for the manage¬ment of repetitive ventricular fibrillation resistant to defibrillation.

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