方法分别应用二维法（2D法）、多普勒压力减半时间法（PHT法）及实时三维容积法（RT3DE）检测18例行PBMV患者手术前后MVA。
Methods MVA was estimated in 18 patients before and after PBMV, using two-dimensional echocardiography(2DE), Doppler pressure half-time(PHT) and volumetric RT3DE.
方法分别应用二维法（2D法）、多普勒压力减半时间法（PHT法）及实时三维容积法（RT3DE）检测18例行PBMV患者手术前后MVA。
Methods MVA was estimated in 18 patients before and after PBMV, using two-dimensional echocardiography(2DE), Doppler pressure half-time(PHT) and volumetric RT3DE.
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