CHA₂DS₂-VASc Score
Calculate the CHA₂DS₂-VASc stroke risk score for patients with atrial fibrillation. Shows score, annual stroke risk percentage, and anticoagulation threshold guidance.
CHA₂DS₂-VASc score
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Educational tool. Not a substitute for clinical judgment, professional diagnosis, or treatment. Always verify with current guidelines.
How to use the cha₂ds₂-vasc score
Tick each criterion that applies. The score predicts annual stroke risk in non-valvular atrial fibrillation.
Formula & explanation
Sum of points (max 9). Age ≥75 contributes 2 and overrides 65–74. Used to guide anticoagulation decisions.
Examples
A 70-year-old woman with HTN and diabetes: 1 + 1 + 1 + 1 = score of 4 (~4% annual stroke risk).
Frequently asked questions
- Treatment threshold?
- Most guidelines recommend anticoagulation for ≥2 in men or ≥3 in women. Verify with current local guidance.
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