A Case of Idiopathic Ventricular Fibrillation Associated with J wave Syndrome

Abstract

We present a case of idiopathic ventricular fibrillation (VF) associated with J wave. A 27-year-old man fainted while fishing in the daytime. An automatic external defibrillator identified VF, which was successfully terminated. Twelve-lead electrocardiography (ECG) at the emergency room showed prominent J waves in the inferior and lateral leads. Ventricular late potential was shown by signal-averaged ECG and sustained VF was induced by programmed ventricular stimulation during an electrophysiological study. He was diagnosed as having idiopathic VF related to J wave, and underwent implantation of an implantable cardioverter-defibrillator.