Fig. 4
Linear regression plots comparing the 4 methods of this study: the indirect methods (VOL and both AIMs) and the direct method (JET). Given non-parametric distribution of data, Spearman’s correlation coefficients are substituted for Pearson’s. Mitral regurgitation (MR) is denoted by red points, tricuspid regurgitation (TR) is denoted by blue points. VOL = volumetry method, AIMstat = annular inflow method by static plane, AIMtrack = annular inflow method by valve-tracking plane, JET = direct measurement of jet