to assess effects of beta-adrenergic blockade on ventricular tachycardia ( vt ) of various mechanisms , electrophysiology studies were performed before and after intravenous infusion of propranolol ( 0.2 mg/kg ) in 33 patients with chronic recurrent vt , who had previously been tested with intravenous verapamil ( 0.15 mg/kg followed by 0.005 mg/kg/min infusion ) .
C0033497
propranolol
C0042514
vt