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Interobserver consistency of quantitative measurements. Scatterplots of MR (black) and TR (red) demonstrate high reproducibility between Readers 1 and 2 for both direct (left panels) and indirect (right panels) methods in quantifying regurgitant flow volume (top panels) and regurgitant fraction (bottom panels). The solid line is the line of best fit using least squares method. The dashed lines indicate the asymptotic 95% confidence intervals (CI). r = Pearson correlation coefficient.
