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胸痛综合征患者中,大约20%冠脉造影正常。作者研究证明,这20%患者多数符合X综合征,心肌缺血由微小冠脉病变所致,作者称之为微血管性心绞痛
About 20% of patients with chest pain syndrome have normal coronary angiography. The authors study shows that most of these 20% of patients with Syndrome X, myocardial ischemia caused by small coronary lesions, the author called microvascular angina