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Prognostic importance of atrial fibrillation in asymptomatic aortic stenosis: The Simvastatin and Ezetimibe in Aortic Stenosis study
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Medicine. Dept Med Skellefta, Skellefta, Sweden.
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2013 (English)In: International Journal of Cardiology, ISSN 0167-5273, E-ISSN 1874-1754, Vol. 166, no 1, 72-76 p.Article in journal (Refereed) Published
Abstract [en]

Background: The frequency and prognostic importance of atrial fibrillation (AF) in asymptomatic mild-to-moderate aortic stenosis (AS) has not been well described. Methods: Clinical examination, electrocardiography and echocardiography were obtained in asymptomatic patients with mild-to-moderate AS and preserved left ventricular (LV) systolic function, randomized to simvastatin/ezetimibe combination vs. placebo in the Simvastatin and Ezetimibe in Aortic Stenosis (SEAS) study. At inclusion, AF was categorized as episodic or longstanding. Rhythm change was assessed on annual in-study electrocardiograms. Impact of AF on cardiovascular morbidity and mortality was determined by adjusting for biomarkers, clinical- and echocardiographic covariates. Results: Mean follow-up was 4.3 +/- 0.8 years (6,721 patient-years of follow-up). At baseline, episodic AF was present in 87 patients (5.6%), longstanding AF in 55 (3.5%) and no AF in 1,421 (90.9%). Incidence of new-onset AF was 1.2%/year; highest in those with impaired LV function. In multivariable analysis, longstanding AF was compared to no AF at baseline, associated with a 4.1-fold higher risk of heart failure (CI 1.2 to 13.8, p = 0.02) and a 4.8-fold higher risk of non-hemorrhagic stroke (CI 1.7 to 13.6, p = 0.003). Conclusion: Rate of AF is moderate in asymptomatic AS. Longstanding but not episodic AF was, independently predictive of increased risk of heart failure and non-hemorrhagic stroke. New-onset AF was associated with cardiac decompensation. (c) 2011 Elsevier Ireland Ltd. All rights reserved.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 166, no 1, 72-76 p.
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Cardiac and Cardiovascular Systems
URN: urn:nbn:se:umu:diva-73556DOI: 10.1016/j.ijcard.2011.09.064ISI: 000318966300022OAI: diva2:632706
Available from: 2013-06-25 Created: 2013-06-25 Last updated: 2013-06-25Bibliographically approved

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