Objective To study the therapeutic effect ofem ergent P T C A in high risk patients w ith acute in ferior M Iinstead of acute anterior M Iw hich had been proved to be effective.

• 目的 急诊经皮冠状动脉腔内成型术（ Em ergence P T C A）能改善急性前壁心梗患者的预后已成定论，但急诊 P T C A 是否对急性下壁心梗患者有益尚有争论。