Case Report
Natália Noronha, Maria
Abstract
The authors present the case of a 9-month-old infant with Wolff-Parkinson-White syndrome admitted with both wide and narrow QRS complex tachyarrhythmias during the same episode. The former reverted spontaneously. The latter, however, was refractory to vagal man oeuvres, adenosine and electrical cardioversion. Sinus rhythm was restored following an intravenous infusion of amiodarone.