Holter monitoring was performed in 202 patients with idiopathic dilated car
diomyopathy, which revealed accelerated idioventricular rhythm in 16 patien
ts (8%) and nonsustained ventricular tachycardia in 70 patients (35%). Duri
ng 32 +/- 15-month prospective follow-up, no significant difference was obs
erved for major arrhythmic events and transplant-free survival between pati
ents with and without accelerated idioventricular rhythm, whereas patients
with nonsustained ventricular tachycardia had a significantly higher incide
nce of major arrhythmic events and a lower transplant-free survival rate.