Figure 1.

Calculation of the forward LVEF by the Dumesnil method. The forward LVEF is calculated by dividing the forward LV SV measured in the LV outflow tract from the LV outflow tract diameter (A) and flow velocity‐time integral (B) by the LV end‐diastolic volume calculated from the LV end‐diastolic diameter (C) by the $\mathrm{Teichholz}\mathrm{formula}=\frac{7\times \mathrm{LV}\mathrm{end}\mathrm{diastolic}\mathrm{diameter}{(\mathrm{cm})}^3}{2.4+\mathrm{LV}\mathrm{end}\mathrm{diastolic}\mathrm{diameter}(\mathrm{cm})}$ LV indicates left ventricular; LVEDD, left ventricular end‐diastolic diameter; LVEDV, left ventricular end‐diastolic volume; LVEF, left ventricular ejection fraction; LVOT, left ventricular outflow tract; SV, stroke volume; VTI, velocity‐time integral.