结论：心肌梗死前心绞痛发作未显示对老年首发心肌梗死患者的保护作用，未能改善患者的近期预后。
Conclusion: Preinfarction angina has not display protection in elderly patients with initial AMI, and can not improve short-term prognosis of patients.
目的：探讨心肌梗死前心绞痛对再灌注治疗后心肌微血管功能的影响，从心肌微循环灌注角度阐明梗死前心绞痛的意义。
Objective:To investigate the influence of preinfarction angina on microvascular function, and to illustrate the implication of preinfarction angina according to the microvasculation perfusion level.
目的：探讨心肌梗死前心绞痛对再灌注治疗后心肌微血管功能的影响，从心肌微循环灌注角度阐明梗死前心绞痛的意义。
Objective:To investigate the influence of preinfarction angina on microvascular function, and to illustrate the implication of preinfarction angina according to the microvasculation perfusion level.
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