label: paroxysmal familial ventricular fibrillation
label_lc: paroxysmal familial ventricular fibrillation
description: A rare, genetic, cardiac rhythm disease characterized by ventricular fibrillation in the absence of any structural or functional heart disease, or known repolarization abnormalities. The presence of J waves is associated with a higher risk of nocturnal ventricular fibrillation events and a higher risk of recurrence.