Table 3

Measurements of Leaflets and Chordae Tendineae

Control (n = 30)MVPANOVA p Value
MAD− (n = 42)MAD+ (n = 59)
Mitral leaflet areas
 Anterior leaflet surface area, mm2523 ± 107707 ± 182858 ± 296<0.0001
 Posterior leaflet surface area, mm2363 ± 66549 ± 157706 ± 252<0.0001
 Total leaflet surface area, mm2886 ± 1411,256 ± 2911,564 ± 474<0.0001
 Leaflet to mitral annular area ratio1.3 ± 0.11.2 ± 0.11.3 ± 0.1<0.0011
Mitral prolapse measurements
 Billow volume, ml0.0 (0.0–0.1)0.0 (0.2–0.8)1.4 (0.7–1.9)<0.0001
 Billow height, mm1.7 ± 0.94.9 ± 2.97.3 ± 2.8<0.0001
 Chordae tendonae geometry
 Length from anterolateral papillary muscle to coaptation, mm18.7 ± 3.421.8 ± 4.024.6 ± 4.4<0.0001
 Length from posteromedial papillary muscle to coaptation, mm19.1 ± 3.923.4 ± 5.226.3 ± 5.7<0.0001

Values are mean ± SD, median (interquartile range), or n (%) as appropriate.

Abbreviations as in Table 1.

  • p < 0.005 versus normal.

  • p < 0.05 versus MAD−.

  • p < 0.005 versus MAD–.