The CHADS₂ score is used to estimate ischemic stroke risk in patients with non-valvular atrial fibrillation, based on five clinical variables: congestive heart failure, hypertension, age ≥ 75 years, diabetes, and prior stroke or TIA. This tool is provided for educational purposes only and must not replace individual clinical assessment.
CHADS₂ Calculator
Select the patient’s clinical features and click “Calculate”.
Result
CHADS₂ score: –
The higher the CHADS₂ score, the higher the estimated annual risk of stroke. As a rough guide, 0 is considered low risk, whereas scores ≥ 2 indicate substantially higher risk and often support anticoagulation according to major guidelines. Final treatment decisions should always be made by a specialist in the appropriate clinical context.
References
- Gage BF, et al. Validation of Clinical Classification Schemes for Predicting Stroke. JAMA. 2001;285(22):2864-2870. Available at: https://pubmed.ncbi.nlm.nih.gov/11401607/
- Wikipedia. CHA₂DS₂-VASc score (CHADS₂ section). Available at: https://en.wikipedia.org/wiki/CHA2DS2%E2%80%93VASc_score#CHADS2
- Medscape. Scores for Stroke Risk Assessment in Atrial Fibrillation. Available at: https://emedicine.medscape.com/article/2172597-overview
- Rev Esp Cardiol. The CHADS₂ score to predict stroke risk in the absence of atrial fibrillation. Available at: Article in Rev Esp Cardiol