fifty patients with recurrent sustained symptomatic ventricular tachycardia ( 43 patients ) or ventricular fibrillation ( 7 patients ) resistant to a mean of 2.8 + 1.4 antiarrhythmic drugs were treated with sotalol , a beta-adrenergic receptor antagonist , and 45 underwent invasive electrophysiologic testing before and after sotalol therapy .
C0042510
ventricular fibrillation
C0037707
sotalol