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目的:评价实时三维彩色多普勒血流显像(RT-3D CDFI)技术无创性定量主动脉瓣反流束容积(re-gurgitant jet volume,RJV)和反流束分数(RJF%)的价值。方法:31例单纯性主动脉瓣反流患者,应用实时三维超声心动图技术采集左室的全容积数据库和三维彩色主动脉瓣反流束信号数据库,利用TomTec三维图像处理工作站分别测量左室舒张末期容积(LVEDV)、左室收缩末期容积(LVESV)和RJV,计算出RJF%。在二维超声心动图上用脉冲多普勒(PD-2D)测量计算反流容积(RV)和反流分数(RF%)。对RT-3D CDFI和PD-2D的测量值进行相关分析。结果:RT-3D CDFI和PD-2D两种方法评价主动脉瓣反流的测值相关性良好,其中RT-3DCDFI测得的RJV%与PD-2D测得的RV相关性为r=0·91,Y=0·87X+6·29,P<0·01;RT-3D CDFI测得RJF%与PD-2D测得的RF%的相关性为r=0·88,Y=0·73X+12·33,P<0·01。结论:RT-3D CDFI可从三维空间对主动脉瓣反流进行评价,为临床定量评估主动脉瓣反流提供了一种新的无创技术。
Objective: To evaluate the value of noninvasive quantitative re-gurgitant jet volume (RJV) and regurgitation beam fraction (RJF%) by real-time three-dimensional color Doppler flow imaging (RT-3D CDFI) . Methods: A total of 31 patients with simple aortic regurgitation were enrolled in this study. Real-time three-dimensional echocardiography was used to collect the left ventricular total volume database and three-dimensional color aortic regurgitation beam signal database. The left ventricular diastolic End-volume (LVEDV), left ventricular end-systolic volume (LVESV), and RJV. Reflux volume (RV) and fractional reflux (RF%) were calculated by pulsed Doppler (PD-2D) measurements on two-dimensional echocardiography. Correlation analysis of RT-3D CDFI and PD-2D measurements. Results: There was a good correlation between RT-3D CDFI and PD-2D in evaluating aortic regurgitation. The correlation between RJV% measured by RT-3DCDFI and RV measured by PD-2D was r = 0 · 91, Y = 0 · 87X + 6 · 29, P <0 · 01. The correlation between RJF% measured by RT-3D CDFI and RF% measured by PD-2D was r = 0.88 and Y = 0.73X + 12.33, P <0.01. Conclusion: RT-3D CDFI can evaluate aortic regurgitation in three-dimensional space and provide a new noninvasive technique for clinical quantitative assessment of aortic regurgitation.