鉴于有创诊断技术公认的缺点,急需一种确定二尖瓣关闭不全的无创方法。使用目前可行的技术,例如:超声多普勒速度测量和彩色多普勒流量计测,已尝试制作出彩色喷射区域与返流的相关性,等等。根据湍流喷射原理,对于流经返流部位的流速,代们进行了更为基础的研究,从而推导出一个理论模型。数学等式通过超声多普勒可测参数的函数表示 Given the recognized shortcomings of invasive diagnostic techniques, there is an urgent need for a noninvasive method of determining mitral regurgitation. Using currently available techniques, such as ultrasonic Doppler velocimetry and color Doppler flowmetry, attempts have been made to create a correlation between color ejection areas and regurgitation, and so forth. According to the principle of turbulent jet, a more fundamental study on the velocity of the flow through the regurgitant site is carried out, and a theoretical model is derived. The mathematical equation is expressed as a function of the Doppler measurable parameter of the ultrasound