countershock using 2.5 to 40 j stored energy ( damped sinusoidal wave form ) was attempted 115 times to terminate 100 episodes of ventricular tachyarrhythmia ( ventricular tachycardia , 91 ; ventricular flutter , 3 ; ventricular fibrillation , 6 ) .
C0042514
ventricular tachycardia
C0152173
ventricular flutter