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8 MR ERO Proximal Isovelocity Area Surface Area (PISA) Mitral valve effective regurgitant orifice area MR flow rate Proximal Isovelocity Flow rate Surface Area (PISA) Mitral valve regurgitation flow rate MR max PG Maximum Pressure Gradient (Mitral Regurgitation) Pressure gradient Maximum pressure gradient (mitral regurgitation) MR mean PG Mean Pressure Gradient Pressure gradient Mean pressure gradient (mitral regurgitation) (simplified) MR RF Proximal Isovelocity Fraction Surface Area (PISA) Mitral valve regurgitant fraction MR volume Proximal Isovelocity Regurgitant volume Surface Area (PISA) Mitral valve regurgitant volume MV E/A MV E/A Ratio Mitral valve E-to-A ratio MV max PG Maximum Pressure Gradient (Mitral Valve) Pressure gradient Mitral valve maximum pressure gradient (simplified) MV mean PG Mean Pressure Gradient Pressure gradient Mitral valve mean pressure gradient (simplified) MV P1/2t MV P1/2T Pressure half-time Mitral valve pressure half-time MVA (P1/2t) MVA (P1/2T) Area Mitral valve area via P1/2t PA max PG Maximum Pressure Gradient Pressure gradient Maximum pressure gradient (simplified) EnVisor Series User’s Guide M2540-30000-ug-02 211
