Submitral Diverticulum in Hypertrophic Cardiomyopathy in an Adult Male: A Phenotypic Marker for Electrophysiological Consequences

Submitral diverticulum of left ventricle is rare entity often presumed to be congenital in origin having preserved myocardial contractility and function. Patients may be entirely asymptomatic for many years or may have varied clinical or electrophysiological manifestations. We present a case of a middle-aged man with hypertrophic cardiomyopathy who presented with atrial fibrillation and ventricular tachycardia detected to have submitral diverticulum on computed tomography angiography which further assisted in planning of electrophysiology ablation.