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The mitral regurgitation index: an echocardiographic guide to severity

^a Division of Cardiology, University of California, San Francisco, California, USA

View larger version (12K): [in a new window]   Figure 1 Correlation graph of the study population of 85 patients, of the Mitral Regurgitation Index versus the three grades of mitral regurgitation (MR): mild MR (n = 29), moderate MR (n = 27), severe MR (n = 29). All patients with severe MR had an MR Index >1.83 and all those with mild MR had an MR Index <1.67.

View larger version (18K): [in a new window]   Figure 2 Regression plot of correlation between the Mitral Regurgitation Index and the regurgitant fraction in 85 patients with varying grades of mitral regurgitation (r = 0.76, p < 0.0001). In patients with a regurgitant fraction greater than 60%, the MR Index was noted to exceed 2.0 in all cases.