Figure 3

Upper part: measurement of the radius (r = 0.7 cm) of the flow convergence zone (FCZ, arrow) at mid-systole in a 4-chamber apical view, with an aliasing velocity of 30 cm/s. LA: left atrium; LV: left ventricle. Middle part: measurement of the regurgitation time (t, in secondes) by color M-mode at the level of flow convergence hemisphere; t = 0.261 secondes. Lower part: measurement of the velocity time integral (VTI, cm) and the peak regurgitant flow (Vmax, m/s) by continuous wave Doppler. VTI = 155 cm and Vmax = 5.2 m/s