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。
Should myocardial ischemia continue too long, myocyte death occurs, and electrical shock after this will only result in pulseless electrical activity or asystole.
目的观察利心煎剂对麻醉大白鼠冠脉结扎再灌注引起的致死性心室纤颤（VF）发生率的影响。
Objective To examine the effect of Lixin decoction on the lethal VF induced by the coronary artery ligation-reperfusion in anesthetized rats.
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