Assertion: atrial fibrillation's stroke | /r/CreatedBy | stroke
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text: The Framingham study has shown that during a follow up period of 30 years, patients with nonvalvular AF had a more than fivefold risk of stroke and the risk of stroke attributed to stroke increased with age.12 Ischemic stroke can be the first manifestation of occult AF, which is also referred to as subclinical AF.