多普勒超声测定左室压力上升速率的探讨

Investigation of Estimating Rate of Left Ventricular Pressure Rise By Doppler Echocardiography

在彩色多普勒血流显像技术指导下，应用连续波多普勒超声获取２３例冠心病患者的二尖瓣返流频谱，计算左室压力上升速率（△Ｐ／△ｔ），与心导管法△Ｐ／△ｔ比较，二法具有高度相关性（ｒ＝０．８６，Ｐ＜０．００１）；与心血管造影ＥＦ比较，ｒ＝０．８７，Ｐ＜０．００１。表明多普勒超声无创性测定左室△Ｐ／△ｔ准确可靠，能真实反映左室收缩功能变化。

In this study,mitral regurgitation velocity curve of 23 cases of coronary artery disease were obtained by continuous wave Doppler echocardiography,guided by coloc Doppler flow imaging,to calculate the rate of left ventricular pressure rise(LV △P/△t).The results show that there is a good linear correlation between Doppler-derived LV △P/△t and not only LV △P/△t calculated from cardiac catheterization(r=0.86,P<0.001)but also ejection fraction (EF) obtained from angiocardiography(r=0.87,P<0.001).The study suggests that LV △P/△t derived from the rising segment of the continuous wave Doppler mitral regurgitation velocity curve is reliable and accurate.