AF is an exceedingly common age-related arrhythmia. Among people of European descent, the lifetime risk of developing AF after age 40 is 26% for men and 23% for women.8 There are multiple risk factors for development of AF.5,7 Some of these risk factors are modifiable, including hypertension, obesity, endurance exercise, obstructive sleep apnea (OSA), thyroid disease, and alcohol consumption, whereas many others are not.5,7,9,10,11 Nonmodifiable risk factors include age, sex, family history, race, tall stature, and other types of heart and valvular disease.5,7 Among the many risk factors for development of AF, age is perhaps the most powerful.8,9 The relative risks (RRs) of AF development associated with a number of risk factors are provided in a recent systematic review.12 It is rare to develop AF prior to age 50; and by age 80, approximately 10% of individuals are diagnosed with AF. The precise pathophysiological basis of this link between AF and age is not completely understood; however, age-related fibrosis likely plays a key role.9 AF risk factors have also been shown to be of value in predicting progression of paroxysmal to persistent AF.13 It is notable that many of the risk factors that have been associated with development of AF also contribute to AF progression, recurrences of AF following ablation, and complications associated with AF (e.g., stroke).