摘要用血流会聚新方法及射流参数对二尖瓣返流定量的价值进行了研究.结果表明血流会聚法计算返流量与二尖瓣返流容积及返流分数相关性最佳(r=0.87～0.93,P<0.0001).彩色多普勒射流参数与二尖瓣返流容积和二尖瓣返流分数的相关性不一,其中返流起始宽度与两者相关性分别为,=0.88和0.81(P<0.0001.),返流面积:r=0.72和0.77(P<0.001～0.0001);瞬时返流容积, r=0.70和0.70(P<0.001),返流长度: r=0.50和0.61(P<0.05),返流面积与左房面积比值:r=0.27和0.29(P>0.05).血流会聚返流量和返流起始宽度在区别轻、中、重返流方面也具有较高的准确性,两者分别为:91.3%～95.7%和82.6%～95.7%.血流会聚法计算二尖瓣返流量是一准确、可靠的全定量指标.众射流参数在二尖瓣返流的半定量诊断中也具有较大价值,其中以返流起始宽度最佳.

abstractsThe value of flow convergence and jet parameters in quantification of mitral regurgitation was estimated.The resultS showed that there were excellent correlations between mitral regurgitant flow convergence volume and mitral regurgitant volume,regurgitant fraction(r=0.87～0.93,P<0.0001).The correlations between jet parameters and regurgtant volume,regurgitant fraction were different,jet beginning width:r=0.88 and 0.81(P<0.0001),jet area : r=0.72 and O.50 and 0.61(P<0.05)and the ratio of jet area to left atrial area:r=0.27 and 0.29(P>0.05).The accurate rates of regurgitant flow convergence volume and jet beginning width in differentiating the grades of mitral regurgitation were 91.3～95.7%and 82.6～95.7%respectively.Mitrai regurgitant flow convergence volume is an accurate and reliable parameter in the quantification of mitral regurgitation.Jet parameters are of relative value in semiquantitation of mitral regurgitation,especially the jet beginning width.