electrophysiologic studies were carried out in 85 patients with serious ventricular arrhythmias : 44 with recurrent sustained ventricular tachycardia ( group a ) , 16 with recurrent nonsustained ventricular tachycardia ( group b ) , and 25 with recent prehospital ventricular fibrillation not associated with acute myocardial infarction ( group c ) .
C0085612
ventricular arrhythmias
C0042510
ventricular fibrillation