Results
A total of 93 MR patients with a median (interquartile range) age of 59.00 (50.50-65.00) were recruited, of whom 38 (40.9%) were female. Of the 93 patients, 29 (31.2%), 29 (31.2%), and 35 (37.6%) were classified into mild, moderate, and severe MR, respectively. The four parameters of MVVTI/LVOTVTI, MVAVTI-index (i), MVAVTI/LVOTDVTI, and E velocity-LA area-i were shown to be significantly different among mild, moderate, and severe MR groups (p-values <0.001). Spearman’s correlation test indicated that MVVTI/LVOTVTI, MVAVTI-i, MVAVTI/LVOTDVTI, and E velocity-LA area-i were highly and significantly correlated with MR severity classification with correlation coefficients of 0.776, 0.672, 0.822, and 0.698, respectively (p-values <0.001). The ROC-curve analysis demonstrated that all parameters were significantly accurate predictors of severe MR diagnosis. The area under curve (AUC) of the MVVTI/LVOTVTI, MVAVTI-i, MVAVTI/LVOTDVTI, and E velocity-LA area-i were 0.976, 0.975, 0.986, and 0.895, respectively (p-values <0.001)