Table 2

Mitral Annular Measurements by Different MR Etiology

DegenerativeProlapseFlailFunctionalp Value
ROA, cm20.25 ± 0.110.51 ± 0.200.55 ± 0.350.56 ± 0.240.001
ROA shape index1.24 (1.09–1.57)2.14 (1.80–3.04)2.20 (1.69–2.91)3.91 (2.79–4.84)<0.001
Mitral valve tenting area, cm21.72 ± 0.412.00 ± 0.572.15 ± 0.823.55 ± 1.30<0.001
Anterior mitral leaflet angle, (°)18 ± 713 ± 616 ± 628 ± 8<0.001
Posterior mitral leaflet angle, (°)22 ± 814 ± 720 ± 947 ± 6<0.001
Mitral annulus area, cm28.31 ± 1.5613.04 ± 3.8110.39 ± 3.0915.26 ± 4.40<0.001
Mitral annulus shape index1.31 ± 0.181.30 ± 0.181.33 ± 0.131.18 ± 0.120.026
CC diameter, cm4.27 ± 0.384.94 ± 0.534.70 ± 0.405.11 ± 0.55<0.001
AP diameter, cm3.19 ± 0.563.74 ± 0.523.44 ± 0.454.29 ± 0.66<0.001

Values are mean ± SD or median (interquartile range). The p value denotes significant differences among the 4 groups (ANOVA or Kruskal-Wallis test).

AP = anterior-posterior dimension; CC = commissure-commissure dimension; ROA = regurgitant orifice area; other abbreviations as in Table 1.