Conclusion: Preinfarction angina has not display protection in elderly patients with initial AMI, and can not improve short-term prognosis of patients.
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。
2
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.