Journal Article
Research Support, Non-U.S. Gov't
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Metabolic syndrome negatively influences disease progression and prognosis in aortic stenosis.

OBJECTIVES: This study sought to examine the association between the metabolic syndrome (MS) and the progression of aortic stenosis (AS).

BACKGROUND: It has been suggested that aortic valve sclerosis and its progression to AS are caused by an atherosclerotic process. Metabolic syndrome is associated with a higher risk of vascular atherosclerosis. Thus, we hypothesized that the atherogenic features of MS could negatively influence disease progression and prognosis in patients with AS.

METHODS: We retrospectively analyzed the data of 105 consecutive patients (age 69 +/- 12 years, 64 men) with at least moderate AS. Of these patients, 40 (38%) had MS identified according to the modified clinical criteria proposed by the National Cholesterol Education Program-Adult Treatment Panel III. The hemodynamic progression of AS was assessed by the measurement of the annualized decrease in valve area during the follow-up period of the study, which averaged 28 +/- 13 months. Event-free survival was defined as the absence of death or aortic valve replacement during follow-up.

RESULTS: The hemodynamic progression of the stenosis was twice as fast (-0.14 +/- 0.13 cm2/year vs. -0.08 +/- 0.08 cm2/year, p = 0.008) and the three-year event-free survival was markedly lower (44 +/- 8% vs. 69 +/- 6%, p = 0.002) among patients with MS. In multivariate analysis, MS was found to be a strong independent predictor of both stenosis progression (p = 0.006) and event-free survival (odds ratio 3.85, 95% CI 1.96 to 7.58, p < 0.001).

CONCLUSIONS: The present study is the first to report that MS is associated with a faster disease progression and worse outcome in patients with AS. Such findings open new avenues of research and provide a strong impetus for the elaboration of additional prospective studies focusing on this association.

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