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Background: We have shown that functional mitral stenosis (MS) can occur in patients following mitral valve repair for degenerative mitral regurgitation. In these patients both mitral valve gradient and calculated mitral valve area are associated with exercise capacity, intracardiac hemodynamics and the patient's perception of well being, but their usefulness in predicting clinical outcome events during follow-up has not been defined.
Methods: We performed a prospective follow-up study on 110 patients who had mitral valve repair for degenerative MR with no more than mild residual mitral regurgitation. These patients were the original cohort in our previous study on stress echocardiography in these patients. Follow-up was performed by telephone interview and a search of the electronic records. The 3 measures of MS indices were mean diastolic mitral gradient, > 3 mmHg, mean gradient > 5 mmHg and mitral valve area ≤ 1.5 cm2. The outcome events were all cause mortality, mitral valve replacement (MVR), new heart failure and new atrial fibrillation (AF).
Results: The follow-up was 11.3 ± 2.3 years since mitral valve repair. The outcomes were listed in the Table.
Conclusions: In patients following mitral valve repair for degenerative mitral regurgitation, MS indices are predictors of outcome events and should be an integral part of the follow-up echocardiograms. Our data suggests that even mild degree of MS with a mean gradient cut-point of 3 mmHg can have functional consequences.
Poster Hall, Hall C
Friday, March 17, 2017, 3:45 p.m.-4:30 p.m.
Session Title: Valvular Heart Disease: Mitral Valve Disease
Abstract Category: 36. Valvular Heart Disease: Clinical
Presentation Number: 1145-029
- 2017 American College of Cardiology Foundation