eighty-six ( 87 % ) of 99 countershock attempts for ventricular tachycardia , 3 ( 60 % ) of 5 for ventricular flutter , and 4 ( 36 % ) of 11 for ventricular fibrillation were successful using this technique .
C0042514
ventricular tachycardia
C0152173
ventricular flutter