Adverse Outcomes Associated with Pre-Existing and New-Onset Atrial Fibrillation in Patients with Acute Coronary Syndrome: A Retrospective Cohort Study

Flow chart indicating the process of patient selection for the study. Pre-existing AF occurred before the diagnosis of ACS and new-onset AF occurred after or at the same time of ACS diagnosis. ACS acute coronary syndrome, AF atrial fibrillation, NHIRD the National Health Insurance Research Databas