Successful management of atrial flutter in a newborn with verapamil.

Verapamil has become a popular antiarrhythmic drug for the acute management of supraventricular tachycardia in infants and children. A full-term, 1-hour-old infant presented with supraventricular tachycardia and hypotension that did not respond to vagal maneuvers and direct current cardioversion. After intravenous verapamil, the heart rate slowed and the underlying rhythm was atrial flutter.