in the remaining 3 instances , the arrhythmia consisted of slow ventricular tachycardia ( 1 case ) , supraventricular tachycardia of the focal type ( 1 case ) , and episodes of primary ventricular fibrillation , not related to acute myocardial ischaemia ( 1 case ) .
C0003811
arrhythmia
C0042510
ventricular fibrillation