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Figure 2 Color M-mode of PFC region. Figure 2A shows a digital image of a color M-mode of the PFC region with small arrows pointing to the mitral leaflet and large areas pointing to direction of regurgitant flow from LV to LA. Figure 2B shows the contour of the PFC region with the velocity set at times the Nyquist limit. This velocity contour and mitral leaflets were then traced to obtain instantaneous radii as shown in Figure 2C (see text for further details).
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