however , during ischemia , atrial pacing with intermittent abrupt pauses resulted in the induction of ventricular arrhythmias beginning after the second conducted beat following each pause ( ventricular premature beats , 20/20 ; ventricular tachycardia , 19/20 ; and ventricular fibrillation , 8/20 ) .
C0085612
ventricular arrhythmias
C0042514
ventricular