Should myocardial ischemia continue too long, myocyte death occurs, and electrical shock after this will only result in pulseless electrical activity or asystole. 如果心肌缺血时间过长,心肌细胞死亡,此时的电除颤只会产生无脉性电活动或心搏停止。
absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death