Comparison of the Echocardiographic Parameters between MR Severity Groups
All four parameters of MVVTI/LVOTVTI, MVAVTI-i, MVAVTI/LVOTDVTI, and E velocity-LA area-i were shown to be significantly different among mild, moderate, and severe MR groups (all p-values <0.001) (Table 1). A pairwise comparison of the MR groups yielded by Bonferroni correction was performed. In all four parameters, there was a significant difference between the median (IQR) values of mild and severe MR groups (all p-values <0.001) and between moderate and severe MR groups (all p-values <0.001). However, no significant difference was observed between the mild and moderate MR groups in all four parameters (Table 1) (p-value for MVVTI/LVOTVTI = 0.538, MVAVTI-i = 1.000, MVAVTI/LVOTDVTI = 0.137, and E velocity-LA area-i = 0.069).