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应用多普勒超声心动图测定３２例二尖瓣狭窄患者球囊扩张术前后的二尖瓣口阻力，并与心导管所获左房平均压，肺毛楔压进行相关分析，以探讨二尖瓣口阻力评价血流动力学变化和瓣膜功能损害的临床价值。结果显示：二尖瓣球囊扩张术后，瓣口面积明显增大，瓣口阻力明显降低（Ｐ＜０．０５）；二尖瓣口阻力与左房平均压、肺毛楔压的相关系数分别为０．９０、０．８６、（Ｐ＜０．００１）。表明二尖瓣口阻力可作为二尖瓣狭窄血流动力学和瓣膜功能损害的指标，值得进一步探讨。
Doppler echocardiography was performed in 32 patients with mitral stenosis before and after balloon dilatation of mitral valve resistance, and with left atrium cardiac catheter average pressure, pulmonary capillary wedge pressure correlation analysis to explore two Clinical value of mitral valve resistance in evaluating hemodynamic changes and valvular dysfunction. The results showed that the mitral valve area increased significantly and mitral valve resistance decreased significantly after balloon mitral valvuloplasty (P <0.05). The correlation coefficient between mitral valve resistance and left atrium average pressure and pulmonary capillary wedge pressure Respectively, 0.90, 0.86, (P <0.001). Show mitral valve resistance as mitral valve stenosis hemodynamics and valvular dysfunction index, it is worth further study.