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Figure 2 Schematic representation of the flow and static pressure across the left ventricular (LV) outflow tract, aortic valve, and ascending aorta during systole. AA = aortic cross-sectional area; AVA = effective aortic valve area (i.e., the cross-sectional area of the vena contracta); LVSP = left ventricular systolic pressure; MGnet = transvalvular pressure gradient after pressure recovery (i.e., net MG); MGvc = transvalvular pressure gradient at the vena contracta; SAP = systolic aortic pressure; SAPvc = systolic aortic pressure at the vena contracta; SV = stroke volume; SVi = stroke volume index; ZVA = valvulo-arterial impedance. From Briand et al. (12), with permission.
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