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Incidence, type of atrial fibrillation and risk factors for stroke: a population-based cohort study

 

Authors Johansson C, Dahlqvist E, Andersson J, Jansson JH, Johansson L

Received 21 September 2016

Accepted for publication 21 November 2016

Published 24 January 2017 Volume 2017:9 Pages 53—62

DOI https://doi.org/10.2147/CLEP.S122916

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Amy Norman

Peer reviewer comments 2

Editor who approved publication: Professor Henrik Toft Sørensen

Purpose: The aims of this study were to estimate the incidence of atrial fibrillation and atrial flutter (AF), to assess the presence of provoking factors and risk factors for stroke and systemic embolism, and to determine the type of AF in patients with first-diagnosed AF.
Patients and methods: This cohort study was performed in northern Sweden between January 1, 2011 and December 31, 2012. Diagnosis registries were searched for the International Classification of Diseases-10 code for AF (I48) to identify cases of incident AF. All AF diagnoses were electrocardiogram-verified. Data pertaining to provoking factors, type of AF and presence of risk factors for stroke and systemic embolism according to the CHA
2DS2-VASc score were obtained from medical records.
Results: The incidence of AF in the entire population was 4.0 per 1,000 person-years. The incidence was 27.5 per 1,000 person-years in patients aged ≥80 years. A total of 21% of all patients had a provoking factor in association with the first-diagnosed episode of AF. The CHA
2DS2-VASc score was 2 or higher in 81% of the patients. Permanent AF was the most common type of AF (29%).
Conclusion:
 There was a considerable increase in the incidence of AF with age, and a provoking factor was found in one-fifth. The most common type of AF was permanent AF. Four in five patients had a CHA
2DS2-VASc score of 2 or more.
Keywords: atrial fibrillation, atrial flutter, incidence, risk factors for stroke

 

摘要视频链接Patients with first-diagnosed atrial fibrillation