PREVALENCE OF MITRAL VALVE PROLAPSE IN RUSSIAN …
PREVALENCE OF MITRAL VALVE PROLAPSE IN RUSSIAN POPULATION
E.G. Malev1, E.V. Zemtsovsky1,2, S.V. Reeva1,2, E.V. Timofeev1, M. Prokudina1
1Almazov Federal Heart, Blood and Endocrinology Centre, 2State Pediatric Medical Academy, St. Petersburg, Russia
Objective: We studied prevalence of MVP in young urban russian population.
Background: Epidemiology of mitral valve prolapse (MVP) has been described in different ethnic groups with controversy data on prevalence depending on age, sex, echocardiographic criteria and ethnicity itself.
Methods: We quantitatively studied 234 unselected young subjects (mean age 20,1±1,6; 68% female) as a part of REPLICA study (pREvalence of mitral valve ProLapse In young Adults). MVP was diagnosed by billowing of leaflets >2 mm above the annulus in the long-axis parasternal view, by maximal leaflets thickness ≥ 5 mm as classic, otherwise as nonclassic.
Results: Ten (4,3%) subjects meet criteria for MVP. Three (1,3%) of them had classic and 7 (3%) nonclassic MVP. Prevalence of nonclassic MVP was higher than in Framingham Heart Study (1,1%; p< 0,01). Subjects with MVP had a significant longer and thicker leaflets (anterior leaflet length: 24,8±3,5 mm vs. 21,6±2,0 mm, p=0,001; thickness: 3,6±1,3 mm vs. 2,5±0,5 mm, p=0,001; posterior leaflet length: 11,6±1,8 mm vs. 10,8±1,6 mm, p=0,01; thickness: 4,0±1,0 mm vs. 2,8±0,6 mm, p=0,05) and larger mitral annulus diameter (31,3±3,7 mm vs. 26,0±3,6 mm, p=0,01) than healthy subjects. Mitral regurgitation was none-to-mild in all subjects, often late-systolic in MVP (p=0,03). Classic MVP subjects compared with healthy had larger interventricular septum thickness (9,7±1,2 mm vs. 8,3±1,1 mm, p=0,05) and LV mass indexes (102±21 g/m2 vs. 74±16 g/m2, p=0,03). The prevalence of tricuspid and aortic valve prolapses was higher in subjects with MVP (p=0,005).
Conclusion: In young urban russian population nonclassic MVP is more prevalence than previously reported.
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