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
造句
用作名詞(n.)
Should myocardial ischemia continue too long, myocyte death occurs, and electrical shock after this will only result in pulseless electrical activity or asystole. 如果心肌缺血時間過長，心肌細胞死亡，此時的電除顫只會產生無脈性電活動或心搏停止。