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Figure 3 Color flow images from a patient in this study. Left, Baseline image with a VCW of 0.4 cm (arrows). The RgV was 35 ml and EROA was 0.4 cm2). Right, During sodium nitroprusside infusion, VCW increased to 0.6 cm (arrows). The RgV and EROA increased to 61 ml and 0.6 cm2, respectively.