We invite the contribution of trials that meet the following criteria:

• Minimum dataset of 30 patients (clinical trial) or 100 patients (academic registry)
• Patients aged 18 years old or older, with a diagnosis or screened for a diagnosis of atrial fibrillation or flutter
• Documented selection criteria
• Documented consent or waiver of consent following local institutional review board- approved procedure
• Baseline assessment includes medical history and a comparable quality of assessment
• Outcome(s) assessed using one or more recognised measure(s)
• Monitoring procedures existed to validate the data