组织速度成像、应变率成像技术定量评价冠心病局部心肌收缩异常的研究

Quantitative evaluation of segment wall motion abnormality in coronary heart disease by QTVI and SRI

目的研究定量组织速度成像(QTVI)和应变率成像(SRI)技术定量评价冠心病局部心肌收缩异常的价值。方法应用QTVI、SRI技术,测量冠心病组(41例)和正常对照组(40例)心肌长轴方向12个节段的收缩期峰值速度(PSV)、收缩期峰值应变率(PSSR)、收缩期速度达峰时间(Tsv)、应变率收缩达峰时间(Tsr)。结果①冠心病组PSV、PSSR较对照组减低(P<0.05),Tsv、Tsr较对照组延长(P<0.05)。②PSSR对于缺血节段的检出率高于PSV(P<0.05),Tsr对缺血节段的检出率最高(68.5%)。结论QTVI、SRI对于定量分析冠心病局部心肌收缩运动异常具有重要价值,SRI更优于QTVI。

Objective To assess the clinical values of quantitative tissue velocity imaging and strain rate imaging in segment wall motion abnormality evaluation in coronary heart disease. Methods The peak systolic velocities, peak systolic strain rates, time- to - peak systolic velocities, time - to - peak systolic strain rates of left ventricular wall in long axis direction were measured and analyzed by TVI,SRI in 41 CHD patients and 40 normal subjects. Results Compared with normal subjects, the peak systolic velocities, peak systolic strain rates of CHD were significant decreased （ P 〈 0.05）, while the time - to - peak systolic velocities, time - to - peak systolic strain rates were significant prolonged （ P 〈 0.05 ）. The detection rate of peak systolic strain rate was higher than peak systolic velocity in CHD group, and time - to - peak systolic strain rate was higher than other parameters （ P 〈 0.05）. Conclusion QTVI, SRI have great values in quantitative analysis of segment wall motion abnormality in CHD, and SRI is better than QTVI.