CHA2DS2-VASc — untreated stroke risk above ~2% a year? No
af-anticoag-not-indicatedNo one has reached this rule yetNo routine anticoagulation; reassess at least annually
No clinician has signed off this rule yet. It reflects our reading of the guidelines cited below, which has not been independently checked.
Word for word, as generated for the example person below. Figures in the text are theirs.
Your stroke risk score is 0, which is below the level where a blood thinner is routinely recommended.
Expert guidelinesOfficial guidelines recommend it, based on trials plus expert judgment.
Scored as: no additional risk factors. That corresponds to roughly about 0.2% a year untreated, where the bleeding risk of anticoagulation broadly cancels the benefit. This is worth rechecking whenever something changes — the score climbs with a birthday, and turning 65 or developing high blood pressure or diabetes can move you across the line without anything about the AF itself changing.
ACC/AHA (US)
Graded as evaluating stroke risk with a validated score such as CHA2DS2-VASc, and re-evaluating the need for stroke prevention at periodic intervals. At an intermediate score the guideline says considering other risk modifiers can inform the decision (2a, C-LD).
2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of… · Recommendation behind this rule · class and level read from the guideline tables on 2026-09-30
2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation · Class 1 · Level B-NR
“Atrial fibrillation, low stroke score” — an illustrative profile, not a real user.
Asked after: Atrial fibrillation
Cited by the recommendations above.
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Runs in lib/engine/afPathway.ts as af-anticoag-not-indicated.