血流多普勒与定量组织速度成像法测量Tei指数评价左心功能的对比性研究

Comparative evaluation of left ventricular function by quantitative tissue velocity imaging and pulsed wave Doppler flow imaging

目的运用定量组织速度成像技术(QTVI)测定心肌梗死患者的Tei指数,与传统方法作对比性研究,探讨QTVI法测量Tei指数在临床评价左心功能的应用价值。方法利用脉冲血流多普勒成像(PW)和QTVI技术,测算30名心肌梗死患者的Tei指数,所有患者均行同位素门控心血池造影检查,记录左心室射血分数(ECT-EF)、左心室局部射血分数(REF)及左心室峰充盈率(PFR)。结果QTVI和PW方法所测Tei指数分别为0．80±0．29、0．73±0．27,两者相比有显著差别(P<0．05)。QTVI法测得的Tei指数与ECT-EF、PFR的相关系数较PW高。QTVI法所测二尖瓣环各位点的Tei指数与其门控所测得的局部射血分数之间均呈负相关关系。结论利用QTVI测算Tei指数可准确评价心脏整体和局部功能,为测量Tei指数评价左心功能提供了一种新的、可靠的检测手段。

Objective To assess the left ventricular function of patients with myocardial infarction by quantitative tissue velocity imaging （QTVI）, and to compare that with pulsed wave Doppler flow imaging. Methods Tei index were measured by QTVI and PW separately in thirty patients with myocardial infarction. All MI patients took multiple gated cardiac blood pool imaging examination to obtain LV global ejection fraction （ECT- EF） ,regional ejection fraction （REF）and peak filling rate （PFR）. Results There were different values of Tei index between QTVI and PW. There were closer correlation between Tei values and ECT - EF obtained by QTVI than by PW, And there were good correlation of Tei index in different walls with REF. Conclusion Evaluation of left ventricular global and regional function with Tei index obtained by QTVI might be a new reliable detecting method.