the clinical arrhythmia in these patients ( mean age , 61 years ) was recurrent ventricular tachycardia in 21 ( 42 % ) , ventricular fibrillation in three ( 6 % ) , and symptomatic nonsustained ventricular tachycardia in 26 ( 52 % ) .
C0003811
arrhythmia
C0042510
ventricular fibrillation