🫀 CHA₂DS₂-VASc Score (AF Stroke Risk)
Estimate annual stroke risk in non-valvular atrial fibrillation with CHA₂DS₂-VASc.
Clinical takeaway
Anticoagulate men ≥ 2 and women ≥ 3 in most guidelines.
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When to use
Guide oral anticoagulation decisions in AF.
How it works
CHF 1, hypertension 1, age ≥75 2, diabetes 1, prior stroke/TIA 2, vascular disease 1, age 65–74 1, female sex 1.
Key points
- Anticoagulate men ≥ 2 and women ≥ 3 in most guidelines.
- Female sex is a risk modifier, not a standalone indication.
- Balance against bleeding risk (HAS-BLED).
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Congestive heart failure / LV dysfunction | No |
|---|---|
| Hypertension | No |
| Age | ≥ 75 (+2) |
| Diabetes | No |
| Prior stroke/TIA/thromboembolism | No |
| Vascular disease (MI/PAD/aortic plaque) | No |
| Sex | Male (0) |
→CHA₂DS₂-VASc2/9
- Recommendation：Oral anticoagulation recommended.
- Note：Female sex is a risk modifier, not a standalone indication; assess the non-sex score.
| Congestive heart failure / LV dysfunction | Yes (+1) |
|---|---|
| Hypertension | Yes (+1) |
| Age | < 65 (0) |
| Diabetes | Yes (+1) |
| Prior stroke/TIA/thromboembolism | Yes (+2) |
| Vascular disease (MI/PAD/aortic plaque) | Yes (+1) |
| Sex | Female (+1) |
→CHA₂DS₂-VASc7/9
- Recommendation：Oral anticoagulation recommended.
- Note：Female sex is a risk modifier, not a standalone indication; assess the non-sex score.
Frequently asked questions
- What is CHA₂DS₂-VASc Score (AF Stroke Risk)?
- Estimate annual stroke risk in non-valvular atrial fibrillation with CHA₂DS₂-VASc.
- How is CHA₂DS₂-VASc Score (AF Stroke Risk) calculated? What is the core formula?
- CHF 1, hypertension 1, age ≥75 2, diabetes 1, prior stroke/TIA 2, vascular disease 1, age 65–74 1, female sex 1.
- When is CHA₂DS₂-VASc Score (AF Stroke Risk) used?
- Guide oral anticoagulation decisions in AF.
- What are the key clinical points for CHA₂DS₂-VASc Score (AF Stroke Risk)?
- Anticoagulate men ≥ 2 and women ≥ 3 in most guidelines. Female sex is a risk modifier, not a standalone indication. Balance against bleeding risk (HAS-BLED).
- What are the limits and cautions when using CHA₂DS₂-VASc Score (AF Stroke Risk)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is CHA₂DS₂-VASc Score (AF Stroke Risk) calculated in practice? Can you show a worked example?
- Inputs: Congestive heart failure / LV dysfunction No, Hypertension No, Age ≥ 75 (+2), Diabetes No, Prior stroke/TIA/thromboembolism No, Vascular disease (MI/PAD/aortic plaque) No, Sex Male (0) → Result: CHA₂DS₂-VASc 2 /9（Recommendation: Oral anticoagulation recommended., Note: Female sex is a risk modifier, not a standalone indication; assess the non-sex score.） Inputs: Congestive heart failure / LV dysfunction Yes (+1), Hypertension Yes (+1), Age < 65 (0), Diabetes Yes (+1), Prior stroke/TIA/thromboembolism Yes (+2), Vascular disease (MI/PAD/aortic plaque) Yes (+1), Sex Female (+1) → Result: CHA₂DS₂-VASc 7 /9（Recommendation: Oral anticoagulation recommended., Note: Female sex is a risk modifier, not a standalone indication; assess the non-sex score.）