目的　探讨梗死相关动脉 (IRA)的血栓阻塞程度与非Q波急性心肌梗死 (AMI)的关系。方法　对 10 4例非Q波AMI患者的冠状动脉造影资料进行分析。结果　研究显示 :非Q波AMI患者IRA完全闭塞发生率为 2 3 1% ,IRA狭窄≥ 95 % ,≥ 90 %和 <90 %分别占 37 5 % ,18 3%和 2 1 1% ,TIMI血流 0 -II级占 6 2 5 %。在“罪犯”血管中有斑块破裂征象者占 71%。在完全闭塞病变的患者中 ,75 %闭塞血管的远端有侧支循环。结论　结果提示 ,非Q波AMI患者较不稳定性心绞痛患者有更为严重的血栓阻塞性病变 ,多数需要再灌注治疗 Objective To investigate the relationship between infarct-related artery (IRA) thrombus occlusion and non-Q-wave acute myocardial infarction (AMI). Methods Coronary angiography data of 104 non-Q AMI patients were analyzed. Results The study showed that the incidence of complete occlusion of IRA in non-Q-wave AMI patients was 231%, IRA stenosis ≥95%, ≥90% and <90% were 37.5%, 18.3% and 21.1% Flow 0-II level accounted for 62.5%. In the “criminals” vascular plaque rupture signs accounted for 71%. In patients with a completely occluded lesion, 75% of occluded vessels have collateral circulation distal to the vessel. Conclusions The results suggest that patients with non-Q AMI have more severe thromboembolic lesions than those with unstable angina and most require reperfusion therapy