amiodarone , 10 ( -6 ) to 5 x 10 ( -5 ) m ( 0.68 to 34 micrograms/ml ) , significantly ( p less than 0.05 ) prolonged adult ventricular muscle action potential duration and voltage-dependent refractoriness at all concentrations , thereby demonstrating typical class iii antiarrhythmic effects .
C0002598
amiodarone
C0003195
antiarrhythmic