I have read with great interest the article by Chakravarty and coworkers1 on disability and mortality among aging runners. Long-term vigorous exercise has been proposed as a risk factor for atrial fibrillation in aging professional and amateur athletes.2-4 I wonder if the authors could find an increased incidence of atrial fibrillation (or flutter) in the medical histories of their study subjects?
Laurent M. Incidence of Atrial Fibrillation Among Aging Runners. Arch Intern Med. 2009;169(7):719. doi:10.1001/archinternmed.2009.34
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