Cardiology

CHA₂DS₂-VASc Score

Stroke risk in atrial fibrillation, guiding anticoagulation.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use in patients with non-valvular atrial fibrillation to estimate annual thromboembolic stroke risk and inform anticoagulation decisions.

Why use

It is the recommended risk-stratification tool in major AF guidelines and is simple to apply at the bedside.

Advice

Guidelines generally suggest anticoagulation should be considered at a score of ≥2 in men and ≥3 in women, and may be considered at ≥1 in men / ≥2 in women. Decisions are individualised and shared.

Critical actions

Always assess bleeding risk (e.g. HAS-BLED) and modifiable bleeding factors before starting anticoagulation. Score alone does not dictate therapy.

Evidence & references

  1. Lip GYH et al. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation. Chest. 2010.

About the creator

Prof. Gregory Y.H. Lip

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