@jc76 CHA2DS2-VASc is a metric where one's risk of stroke due to cardiac arrhythmia can be estimated. A score above 2.0 normally requires a physician to ask the patient to begin taking a DOAC, direct-acting oral anti-coagulant like apixaban (Eliquis) or rivaroxaban (Xarelto).
https://www.mdcalc.com/calc/801/cha2ds2-vasc-score-atrial-fibrillation-stroke-risk
The current guidelines for anti-platelet drug administration is if the patient has been in AF for more than 48 hours or spends several hours each week in that arrhythmia.
https://www.england.nhs.uk/north-west/wp-content/uploads/sites/48/2025/04/23.-Decision-Aid-New-initiation-of-DOACs-in-AF-April-2025-final.pdf