This study was undertaken to validate the accuracies of two-dimentional echocardiographic(2DE)and Doppler left atrial depressurization time(ADT)methods for estimation of mitral valve area(MVA)in patients with mitral stenosis(MS).

• 报道用二维超声技术直接测量及多普勒测左房减压时间法；计算二尖瓣狭窄时瓣口面积的两种方法.