QTVI技术结合Tei指数评价风心病单纯性二尖瓣狭窄左室功能  

Assessment of the left ventricular function in patients with rheumatic heart disease combining with quantitative tissue velocity imaging and Tei index

作　　者：林英姿[1] 

机构地区：[1]杭州师范大学附属医院超声科,杭州310015

出　　处：《影像诊断与介入放射学》2011年第4期308-311,共4页Diagnostic Imaging & Interventional Radiology

摘　　要：目的探讨定量组织速度成像技术(QTVI)结合Tei指数评价风湿性心脏病单纯性二尖瓣狭窄(MS)患者左室心肌长轴收缩功能的应用价值。方法采用QTVI技术分别测量34例单纯性风湿性二尖瓣狭窄(MS)患者和36例健康志愿者二尖瓣环室间隔、侧壁、前壁、下壁、前间隔、后壁处各点的收缩期峰值运动速度(Vs),并测量相关时间间期,计算Tei指数。结果 MS组左室射血分数(LVEF)64.9±7.01%、对照组左室射血分数(LVEF)68.0±6.81%,两组间左室LVEF比较差异无显著意义(P>0.05)。MS组室间隔运动速度4.07±1.44cm/s、侧壁运动速度5.33±1.72cm/s、前壁运动速度4.89±1.71 cm/s、下壁运动速度4.28±1.21 cm/s、前间隔运动速度3.94±1.46cm/s、后壁运动速度5.19±1.81 cm/s、平均峰值运动速度(AVs)4.61±1.62 cm/s;对照组室间隔运动速度6.11±0.96 cm/s、侧壁运动速度8.74±1.40 cm/s、前壁运动速度8.45±1.33 cm/s、下壁运动速度6.59±0.94cm/s、前间隔运动速度6.01±1.25 cm/s、后壁运动速度7.70±1.46 cm/s、平均峰值运动速度(AVs)7.27±1.63 cm/s。MS组与对照组相比较,各节段Vs与平均峰值运动速度(AVs)明显降低,差异有显著意义(P<0.01)。MS组Tei指数0.50±0.12、对照组Tei指数0.21±3.47,MS组Tei指数明显增高(P<0.01)。结论 LVEF很难准确地反映风湿性单纯性二尖瓣狭窄患者左室收缩功能在亚临床水平上的损害,QTVI技术结合Tei指数能更加敏感、有效地定量评价风湿性单纯性二尖瓣狭窄患者左室心肌长轴收缩功能和左室整体功能的损害。Objective To evaluate the clinical value of quantitative tissue velocity imaging （QTVI） and Tel index in detecting left ventricle longitudinal myocardial systolic function in patients with rheumatic mitral stenosis. Methods 34 patients with rheumatic mitral stenosis （MS） and 36 healthy volunteers were examined by QTVI. The systole peak motion velocity （Vs） of mitral annulus on septum, lateral wall, anterior wall, inferior wall, anterior septum and posterior wall was measured respectively. The interval period of mitral annulus motion was obtained and the Tel index was calculated. Results The left ventrieular ejection fractions （ LVEF ）was 64.9 ± 7.01%, 68.0 ± 6.81% for MS group and the control group. There was no significant difference between the two groups （P〉 0.05 ）. The systole peak motion velocity （ Vs ）of mitral annulus on septum, lateral wall, anterior wall, inferior wall, anterior septum and posterior wall was 4.07 ± 1.44 cm/s 、5.33 ± 1.72 cm/s ,4.89 ± 1.71 cm/s 、4.28±1.21 cm/s 、3.94 ± 1.46cm/s ,5.19 ± 1.81chris respectively and average velocity（AV） of mitral valve annulus was 4.61 ± 1.62 cm/s in MS group. The systole peak motion velocity （Vs）of mitral annulus on septum, lateral wall, anterior wall, inferior wall, anterior septum and posterior wall was 6.11 ± 0.96 cm/s,8.74 ± 1.40cm/s 、8.45 ± 1.33 cm/s,6.59±0.94 cm/s,6.01 ± 1.25 cm/s,1.70 ± 1.46 cm/s respectively and average velocity（AV） of mitral valve annulus was 7.27 ± 1.63cm/s in the control group. Compared with the control group, Vs and AV of mitral valve annulus in MS group decreased dramatically and had significant difference （P〈 0.01 ）. Moreover, compared with Tel index of the control group（0.21 ± 3.47）, Tel index of the MS group （0.50 ± 0.12） had greatly increased and had significant difference （P〈0.01）. Conclusion Sub-clinical damage of systolic function of the left ventricle in patients with rheumatic mitral stenosis could not be detected by LVEF. Combined use QT

关 键 词：定量组织速度成像技术 风湿性二尖瓣狭窄 TEI指数 左心室功能 

分 类 号：R445.1[医药卫生—影像医学与核医学] R541.2[医药卫生—诊断学]