Successful treatment of supraventricular tachycardia with metoprolol, a cardioselective beta blocker.

Paroxysmal supraventricular tachycardia is a common problem in infancy and childhood. Past treatment has included digitalis and nonselective beta blockers (propranolol). We describe a new mode of therapy with a cardioselective beta blocker (metoprolol) that may be of use in patients resistant to standard therapy.