Long-term site-related differences in the progression and regression of the idiopathic mitral valve prolapse syndrome.
Cardiology 1999;
91:161-8. [PMID:
10516409 DOI:
10.1159/000006904]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The natural history of uncomplicated mitral valve prolapse (MVP) is not clearly understood. To determine the site-related differences in regression and progression of MVP, 112 patients with idiopathic MVP were enrolled in this echocardiographic follow-up study. Cardiovascular complications, including dysarrhythmias (n = 3, 2.7%), overt congestive heart failure (n = 4, 3.6%), progression of mitral regurgitation over one grade (n = 28, 25.0%), newly confirmed chordal rupture (n = 1, 0.9%), and surgical repair (n = 2, 1.8%), were observed in these patients during a follow-up period of 1-13 years (mean, 4.0 +/- 2.8 years). Multivariate analysis and Kaplan-Meier analysis revealed that posterior leaflet prolapse and significant mitral regurgitation (grade >/=2) were considerable risks for cardiovascular complications. Regression of MVP was seen in 17 (18.7%) of the anterior prolapse patients; however, new prolapse was observed in 40 (35.7%) patients, mainly in posterior prolapse patients. These results suggest that site-related differences exist in uncomplicated MVP prognosis and that MVP in the posterior leaflet has a poor outcome compared to that in the anterior leaflet.
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