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急性冠状动脉闭塞目前仍然是经皮冠状动脉腔内成形术（ＰＴＣＡ）面临的一个重要问题，其发生率在２％～１１％［１］。由此导致的并发症包括：心肌梗塞（ＭＩ）最高发生率达４０％，急诊冠状动脉旁路移植术最高６％，同没有发生闭塞的患者相比，其死亡率增加５倍。在导致冠状
Acute coronary occlusion is still an important issue in percutaneous transluminal coronary angioplasty (PTCA), with an incidence of 2% to 11% [1]. The resulting complications include a 40% maximum MI and a maximum 6% for emergency CABG, a 5-fold increase in mortality compared with those without occlusion. Leading to coronal