Ebrahimi R, Gardin J M
Division of Cardiology, Department of Medicine, University of California, Irvine.
Echocardiography. 1993 Mar;10(2):193-202. doi: 10.1111/j.1540-8175.1993.tb00030.x.
Color Doppler flow mapping of the regurgitant jet is frequently used as a means of assessing the severity of valvular regurgitation. Although convenient, this method of assessing valvular regurgitation is subject to a number of hemodynamic and technical factors that may limit its accuracy. Variations in hemodynamic and structural factors such as orifice size, jet geometry, receiving chamber constraints, afterload, fluid viscosity, heart rate, and cardiac output may have profound effects on the measured regurgitant jet area. Variations in scanning and machine factors, such as scanning direction, Doppler angle, frame rate, color display algorithms, pulse repetition frequency (PRF), system gain, packet size, carrier frequency, wall filter, and transmit power have been shown to alter the measured regurgitant jet area significantly. Despite these limitations, color flow Doppler provides a relatively reliable noninvasive method for semiquantitative assessment of valvular regurgitation. Obviously, standardization of the design and application of the various available color mapping algorithms, as well as other machine and hemodynamic factors, would help provide more reliable and reproducible quantitative information about the degree of valvular insufficiency.
反流束的彩色多普勒血流图常被用作评估瓣膜反流严重程度的一种手段。尽管这种评估瓣膜反流的方法很方便，但它受到许多血流动力学和技术因素的影响，这些因素可能会限制其准确性。血流动力学和结构因素的变化，如瓣口大小、射流形态、接收腔限制、后负荷、流体粘度、心率和心输出量，可能对测量的反流束面积产生深远影响。扫描和机器因素的变化，如扫描方向、多普勒角度、帧率、彩色显示算法、脉冲重复频率（PRF）、系统增益、包大小、载波频率、壁滤波器和发射功率，已被证明会显著改变测量的反流束面积。尽管有这些局限性，彩色血流多普勒为瓣膜反流的半定量评估提供了一种相对可靠的非侵入性方法。显然，对各种可用的彩色映射算法以及其他机器和血流动力学因素的设计和应用进行标准化，将有助于提供关于瓣膜关闭不全程度的更可靠和可重复的定量信息。
