testing was carried out in 34 consecutive patients ( 28 men and 6 women ) who required cardiopulmonary resuscitation and direct current countershock for treatment of primary ventricular fibrillation ( 28 patients ) , ventricular tachycardia ( 5 patients ) or excessively rapid heart rate during atrial fibrillation with preexcitation ( 1 patient ) .
C0042514
ventricular tachycardia
C0039231
rapid heart rate