Over the past decade, numerous impressive advances have been made using nonpharmacologic methods for control of cardiac arrhythmias. These methods include surgical or catheter ablation of abnormal foci. Current techniques involve catheter ablation of the atrioventricular junction to control supraventricular arrhythmias. In addition, surgical techniques have proved to be remarkably safe and effective for treatment of patients with accessory pathways and those with atrioventricular nodal reentrant tachycardia. Patients with drug-refractory ventricular tachycardia may benefit from surgical resection of the ventricular tachycardia focus. The use of these interventional methodologies has radically altered the approach to management of patients with drug-refractory cardiac arrhythmias.