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Figure 7 A standard time/velocity map obtained by color M-mode (top); a time/pressure gradient map generated from color M-mode data by solving Euler equation (middle); and tracings of intraventricular pressure differences obtained by integration of time/pressure gradient map (bottom). E = peak early diastolic gradient obtained from left ventricular inflow; LV = left ventricular; LVOT = left ventricular outflow tract; S = peak systolic gradient obtained from the LVOT.