应用应变率和组织速度成像技术对比评估犬急性心肌缺血面积的实验研究  

Compared to assess acute ischemic myocardium area with strain rate imaging and tissue velocity imaging

作　　者：关丽娜[1] 穆玉明[1] 唐琪[1] 王春梅[1] 吐尔逊娜依.阿迪 

机构地区：[1]新疆医科大学第一附属医院心脏超声诊断科,新疆乌鲁木齐830000

出　　处：《中国医学影像技术》2008年第3期329-332,共4页Chinese Journal of Medical Imaging Technology

基　　金：新疆维吾尔自治区自然科学基金项目(200421101)

摘　　要：目的应用超声新技术应变率成像技术(SRI)和组织速度成像(TVI)评估心肌缺血面积,以确定定量心肌缺血面积较好的方法。方法11只健康杂种犬,结扎冠状动脉左前降支(LAD)造成急性心肌缺血模型,在左室心尖二腔心切面分别用SRI和TVI的彩色M型曲线技术检测出急性缺血心肌分别在前壁和下壁的临界点,以此为界在二维图像上描计出心肌缺血面积与病理缺血面积进行比较。结果应用SRI测量的心肌缺血面积和美蓝染色所测面积呈有意义的相关(r=0.884,P<0.001),TVI估测的面积与病理染色后面积无相关性(r=0.064,P=0.852),SRI和TVI测量急性心肌缺血面积的敏感度和特异度分别为83%、20%和60%、17%。结论SRI比TVI更能准确的估测心肌缺血面积。Objective To assess ischemic myocardium area by strain rate imaging （SRI） and tissue velocity imaging （TVI）, and find a better method to quantify the area of ischemic myocardium. Methods Eleven healthy crossbred dogs were subjected to left anterior descending coronary artery occlusion and made acute ischemic myocardium model. Anatomic Mmode of SRI and TVI was manually curved in two-chamber apical view and the cut-off value of the acute ischemic myocardium was defined in anterior and inferior wall respectively. And the curved and calculated ischemic area was compared with pathology. Results A significantly linear correlation existed between pathology ischemia area and strain rate ischemic area （r =0. 884, P〈0. 001）. There is no correlation between pathology and TVI ischemic area （r=0. 064, P=0. 852）. SRI and TVI ischemic area had 83%, 20% sensitivity, and 60%, 17% specificity, respectively. Conclusion SRI can assess the area of ischemic myocardium more accurately than TVI.

关 键 词：应变率成像技术 组织速度成像技术 

分 类 号：R445.1[医药卫生—影像医学与核医学] R-332[医药卫生—诊断学]