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Figure 2 Measurement of VC Area in Patients
Step 1: rotation and cropping of the 3D dataset to bisect the long axis of regurgitant flow in 2 orthogonal planes (sagittal and coronal orientation). This important step ensured that the subsequent VC area determination would be a true short-axis measurement. Step 2: identification of the frame with the largest VC zone (defined as the smallest cross-sectional area of the regurgitant jet, distal to the regurgitant orifice). Step 3: the color border of the VC short-axis area was manually traced as depicted in the transverse image. Measured VC area (arrowhead) is shown in relation to expanding 3D regurgitant jet. The Online Video shows rotation of the 3D jet and VC area. Abbreviations as in Figure 1.
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