急性冠脉综合征冠脉病变的血管内超声研究

目的 探讨急性冠脉综合征冠状动脉罪犯病变的血管内超声(IVUS)特点.方法 对35例稳定型心绞痛(SA)患者和49例急性冠脉综合征(ACS,包括急性心肌梗死和不稳定型心绞痛)患者进行冠状动脉造影(CAG)检查,并应用IVUS观察冠脉罪犯病变处的粥样硬化斑块的性质,同时测量血管外弹力膜面积(EEA)、管腔面积(LA),计算斑块面积(PA)、斑块负荷、偏心指数(EI),并观察血管重构情况.结果 ACS患者冠脉病变处以软斑块为主(69.4%,34 /49) , SA患者冠脉病变处以硬斑块为主(77.1%,27/35) ,差异有统计学意义(P＜0.05),其中ACS组不稳定斑块、内膜破裂和血栓形成病变占总病变的57.2%,与SA组(8.6%)相比具有显著差异性(P＜0.01);同时两组患者斑块面积(11.26±3.92) mm2 vs (9.43±3.98)mm2],斑块负荷(65.67±11.74)% vs(57.34±11.18)%],偏心指数(0.33±0.22 vs 0.59±0.24)相比差异亦具有显著性(P＜0.01);而且,ACS患者主要以正性重构为主(59.2%),而SA患者主要以负性重构为主(57.1%),二者均有统计学差异(P=0.000,P=0.002).结论 在ACS组不稳定斑块及内膜破裂、血栓形成、血管正性重构发生率明显高于SA组,IVUS检查是在体观察粥样斑块的良好手段,并可以指导治疗策略.

An intravascular ultrasound research about the culprit lesions in acute coronary syndrome

Objective To investigate the characteristic of plaques through intravascular ultrasound.Methods Thirthy-five patients with stable angina pectoris(SA) and fourty-nine patients with acute coronary syndrome(ACS)(included acute myocardial infarction and unstable pectoris) were examined by coronary arteriography(CAG) and intravascular ultrasound(IVUS).We studied the culprit lesions about the characteristic of the plaque,measured the external elastic membrane cross-sectional area and lumen cross-sectional area,ca...