【摘要】 本文利用彩色多普勒血流显像（ＣＤＦＩ）技术，分析了１０１例不同病因的二尖瓣返流（包括扩心病、二尖瓣脱垂、冠心病、风心病及生理性返流）的返流形态特征。在心尖四腔切面，扩心病的返流特征为起始于瓣膜闭合点的“卵圆形”返流束。二尖瓣脱垂其基本血流形态为“偏心水滴样”返流。当前瓣脱垂时，返流束偏向左房内侧壁；后瓣返流时，返流束偏向左房外侧壁。有节段性室壁运动异常而合并返流的冠心病的返流束方向与受累室壁有关，前外侧室壁运动异常合并返流，新月状返流束多位于左房内侧壁；后间壁室壁运动异常伴返流时，新月状返流束多位于前瓣后缘即左房外侧壁。风心病导致的返流，由于二尖瓣装置多部位受累，其形成的血流形态多无一定的特征性变化。生理性返流是不同于上述四种病理性返流的另一类返流。ＣＤＦＩ主要表现为二尖瓣闭合点后方、瓣环附近椭圆形返流束。其返流束面积、长度、最大返流速度以及返流时间与收缩时间比值均显著低于病理性返流。本文结果表明：利用ＣＤＦＩ提供的不同病因返流形态特征及返流参数，结合二维超声心动图的形态学信息，可以为临床病因诊断及治疗提供有益的依据。更多还原

【Abstract】 The patients with mitral regurgitation due to different etiologies could appear specific regur- gitant patterns in apical four chamber view by CDFI,We analyzed spatial distribution,extent and duration of the regurgitant jets. Oval jets starting mitral cloesd point in dilated cardiomyopathy could be observed in left atrium(LA)throughout systole. Jets of mitral prolapse presented an eccentric“drop一like”pattern, being directed LA posterolaterrally or anterointernally. Jets of coronary artery heart disease presented a crescent pattern to direct posterolateral and anterointernal wall of LA.Alarge variety of patterns were found in rheumatic disease due to the individual deformation of leaflets. Physiologic regurgitation was different from the jets above. The pattern,area,length,maximal velocities and regurgitant time/systolic time ratio of its jet were all lower than those of the pathologic regurgitation. We considered that the flow patterns of CDFI with 2DE could benefit etiologic diagnosis and treatment.更多还原