Epidemiology
The overall incidence has been reported as 88/100,000 person-years, with increasing rates with older age. The incidence is 5/100,000 in people <50 years of age and 587/100,000 in those >80 years of age.[5] It occurs 2.5 times more frequently in men than in women, and increases exponentially with age.[6] Atrial fibrillation often coexists with atrial flutter, occurring in 24% to 62% of individuals before flutter ablation and in 30% to 70% after flutter ablation.[6] Most cases of atrial flutter (>98%) are associated with an identifiable predisposing event or a preexisting comorbidity.[5]
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