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Stroke (clinical and subclinical) is associated with increased risk of dementia and cognitive decline. The thromboembolic risk for stroke from atrial fibrillation (AF) is modifiable. The prevalence of AF has been estimated at up to 8% in a large retrospective cohort study of those aged 67 and over, with incidence rising with increasing age (mean age at diagnosis was 80 years).1 A recent meta-analysis found an association between AF and incident dementia in those with recent stroke but less evidence in those without stroke, and commented on the heterogeneity among the studies in this area.2 A subsequent cohort study (n=3045) in those aged ≥65 has reported that …
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