New-onset atrial fibrillation during acute coronary syndromes: Predictors and prognosis

New-onset atrial fibrillation (AF) frequently complicates myocardial infarction, with an incidence of 6–21%. To assess the predictors and prognosis of new-onset AF during acute coronary syndromes (ACS). We performed a retrospective observational cohort study including 902 consecutive patients (mean age 64 years, 77.5% male) admitted to a single center over a two-year period, with a six-month follow-up. AF rhythm was identified in 13.8% patients, of whom 73.3% presented new-onset AF and 26.8% pre-existing AF. New-onset AF was more frequent in older (p