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CHA₂DS₂-VASc score

Also called CHA2DS2-VASc, CHADS-VASc, AF stroke risk

Stroke and thromboembolism risk in atrial fibrillation (includes female sex).

Age
Sex

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Formula and scoring

C 1, H 1, A₂ (≥75) 2, D 1, S₂ (stroke/TIA/TE) 2, V 1, A (65–74) 1, Sc (female) 1. Maximum 9.

Exam and ward pearls

  • Female sex is a risk modifier, not a risk factor: a woman with no other factor scores 1 and needs no anticoagulant.
  • The 2024 ESC guideline replaced this score with CHA₂DS₂-VA (sex removed).

When not to rely on it

  • Stroke risk is dynamic; re-score at follow-up.
  • Discrimination is modest (C statistic about 0.6 in the Euro Heart Survey).

Source

  1. Lip GY, Nieuwlaat R, Pisters R, Lane DA, Crijns HJ. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the Euro Heart Survey on atrial fibrillation. Chest. 2010;137(2):263-72. doi:10.1378/chest.09-1584 · PMID 19762550
  2. Chao TF, Potpara TS, Lip GYH. Atrial fibrillation: stroke prevention. Lancet Reg Health Eur. 2024;37:100797. (Table 1 reproduces CHA2DS2-VASc and HAS-BLED as in the 2020 ESC AF guideline.) doi:10.1016/j.lanepe.2023.100797 · PMID 38362551

Formula and cut-offs checked against these sources on 8 Nov 2026. Educational tool for clinicians; it does not replace clinical judgement.

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