from a population of 260 patients with malignant ventricular arrhythmia ( ventricular fibrillation or ventricular tachycardia with syncope ) we identified 52 ( 20 % ) who had infrequent ventricular premature beats during exercise testing and 48 hours of ambulatory monitoring .
C0085612
ventricular arrhythmia
C0042514
ventricular tachycardia