The Yale Pediatric Electrophysiology and Pacing Service is the busiest in the state and growing. Pediatric and adult congenital heart patients with arrhythmias are cared for at Yale. Patients with congenital arrhythmia syndromes such as Wolff-Parkinson-White, long QT syndrome, Brugada, arrhythmogenic right ventricular dysplasia and other rare "channelopathies" receive care by the team, in addition to those with supraventricular tachycardia and ventricular arrhythmias. The group provides state-of-the-art care including outpatient transcatheter ablation techniques, 3-dimensional arrhythmia mapping and ablation using the Biosense Webster CARTO™ mapping system and pacemaker and defibrillator (ICD) device implantation. Arrhythmia and Pacemaker outpatient clinic sessions are provided and directed by Dr. Steven Fishberger and Nancy Rollinson, PNP. Outpatient arrhythmia monitoring is provided at Yale.