thirty one patients aged 56 +/- 16 years with chronic ventricular tachycardias ( vt ) refractory to 4.4 +/- 1.8 antiarrhythmic drugs , used alone or in combination , were managed by low doses of beta-blocker agents combined with oral amiodarone , either after loading ( 1.2 g for 7 days , n : 7 ) or reloading ( 1.2 g for 4 days , n : 24 ) of amiodarone .
C0003195
antiarrhythmic drugs
C0002598
amiodarone