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The prevalence of atrial fibrillation in a geographically well-defined population in Northern Sweden: implications for anticoagulation prophylaxis
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Cardiovascular epidemiology.
2012 (English)In: Journal of Internal Medicine, ISSN 0954-6820, E-ISSN 1365-2796, Vol. 272, no 2, p. 170-176Article in journal (Refereed) Published
Abstract [en]

Objectives. The aims of this study were to evaluate the community-based prevalence of atrial fibrillation (AF) in a western society using a geographically well-defined population in the northern part of Sweden as a reference and to estimate the proportion of patients eligible for oral anticoagulation (OAC) prophylactic therapy according to the stroke risk indices CHADS2 and CHA2DS2-VASc. Bleeding risk was assessed using the HAS-BLED score.

Design. The study population was recruited from AURICULA, a Swedish national quality register for patients receiving anticoagulation treatment. All patients with the diagnosis AF in the catchment area are registered in AURICULA.

Results. Of the 65 532 inhabitants in the catchment area, 1616 were diagnosed with AF (1200 cases were characterized as chronic AF). Thus, the overall prevalence of AF was 2.5%. The prevalence increased with age from 6.3% in patients over 55 years of age to 13.8% in those over 80 years. The prevalence was higher in men than in women in all age groups. Overall, 56.3% and 85.1% of the population were at high risk of stroke (=2 points) according to CHADS2 and CHA2DS2-VASc, respectively. In addition, 26.9% had an increased bleeding risk according to HAS-BLED.

Conclusion. Within this large Caucasian population, we identified the highest community-based prevalence of AF to date. The prevalence was strongly associated with increasing age and male gender. Using CHA2DS2-VASc instead of CHADS2 widened the indication for OAC prophylactic therapy of AF in this population.

Place, publisher, year, edition, pages
2012. Vol. 272, no 2, p. 170-176
Keywords [en]
atrial fibrillation, epidemiology, prevalence
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-179913DOI: 10.1111/j.1365-2796.2012.02519.xISI: 000306895300009OAI: oai:DiVA.org:uu-179913DiVA, id: diva2:547211
Available from: 2012-08-27 Created: 2012-08-27 Last updated: 2017-12-07Bibliographically approved

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