Table 1

Mitral Valve Features and Associated Echocardiographic Features of MVP

Classic MVP (n = 46)Nonclassic MVP (n = 37)No MVP (n = 217)p Value*
Maximal leaflet displacement (mm)3.8 ± 1.03.1 ± 0.6−0.5 ± 2.0NA
Maximal leaflet thickness (d) (mm)5.6 ± 0.14.3 ± 0.13.6 ± 0.1NA
Anterior leaflet thickness (d) (mm)5.0 ± 0.13.9 ± 0.13.3 ± 0.04NA
Posterior leaflet thickness (d) (mm)5.6 ± 0.14.1 ± 0.13.4 ± 0.1NA
Anterior leaflet length (mm)23.9 ± 0.422.2 ± 0.519.3 ± 0.20.0001
Posterior leaflet length (mm)15.0 ± 0.214.0 ± 0.312.2 ± 0.10.0001
Mitral annular diameter (mm)34.5 ± 0.432.0 ± 0.529.1 ± 0.20.0001
Mitral regurgitation (%)15.1 ± 1.4 (mild)8.9 ± 1.5 (trace)2.4 ± 0.6 (trace)0.0001
Mitral annular calcification11 (20.4)7 (17.5)11 (4.5)0.0001
Papillary muscle tug15 (33.0)11 (30.0)1 (0.4)0.0001
Posterior wall motion44 (95.4)36 (100)60 (26.5)0.0001

d = diastole; MVP = mitral valve prolapse; NA = not applicable because measurements differ by group definition.

  • * p values compare classic MVP + nonclassic MVP versus no MVP.

  • Mitral annular calcification was considered significant if moderate or severe.