稳定型与不稳定型心绞痛患者冠状动脉内超声的对比研究

目的　应用血管内超声对稳定与不稳定型心绞痛患者的冠状动脉病变进行对比分析。方法　 10 5例同时进行了选择性冠状动脉造影和血管内超声的患者 ,按心绞痛性质分为稳定型心绞痛组 (SA组 )和不稳定型心绞痛组 (UA组 ) ,比较两组患者冠状动脉狭窄程度、斑块形态和性质的差异。结果　两组冠状动脉造影显示的病变血管及狭窄程度差异无显著性 ;血管内超声显示 ,UA组病变以脂质斑块多见 ,SA组病变则以纤维斑块和钙化斑块更常见 ;SA组病变钙化的程度较UA组严重 ;UA组病变自发性内膜撕裂和血栓形成的比例明显高于SA组。结论　血管内超声显示 ,稳定型与不稳定型心绞痛患者的冠状动脉病变在形态和性质上存在明显差异。

Comparison of intravascular ultrasound imaging between stable and unstable angina pectoris

Objective To compare the coronary lesions between patients with stable angina and those with unstable angina using intravascular ultrasound. Methods One hundred and five patients who underwent coronary angiography and intravascular ultrasound (IVUS) were divided into stable angina group (group SA) and unstable angina group (group UA). Angiographic features and ultrasound images were compared between the groups. Results Coronary angiography showed no significant differences in the diseased artery and the degree of stenosis between the groups. Intravascular ultrasound revealed that there were significantly more soft lesions in group UA than in group SA, and that fibrous and calcific lesions were more prevalent in group SA. The extent of coronary calcification was significantly greater in group SA than in group UA. Spontaneous dissection and thrombus were more frequently found in group UA than in group SA. Conclusion Intravascular ultrasound demonstrates that there are significant differences in morphology and quality of the coronary lesions between stable and unstable angina pectoris.