同步记录心室外膜多个部位单相动作电位（ＭＡＰ），观察胺碘酮对正常和缺血心脏心室复极及复极离散度的影响。　　资料和方法　２０只健康家兔，体重２．６～３．６ｋｇ，雌雄兼有，随机分入正常组和缺血组。以３０ｍｇ／ｋｇ戊巴比妥钠静脉麻醉，气管插管，维持自身呼吸。沿 Single-phase action potential (MAP) was recorded simultaneously at multiple sites of ventricular epicardium to observe the effects of amiodarone on ventricular repolarization and repolarization dispersion in normal and ischemic heart. Materials and Methods Twenty healthy rabbits, weighing 2.6-3.6 kg, were randomly divided into normal group and ischemia group. To 30mg / kg sodium pentobarbital intravenous anesthesia, endotracheal intubation, to maintain their own breathing. along