CHA₂DS₂-VASc Score Calculator
Calculate stroke risk in patients with atrial fibrillation to guide anticoagulation decisions in line with NICE NG196.
CHA₂DS₂-VASc Score
Anticoagulation Recommendation
About This Score
CHA₂DS₂-VASc Score
The CHA₂DS₂-VASc score is a risk stratification tool used to estimate the risk of stroke in patients with non-valvular atrial fibrillation (AF). It guides clinicians in determining whether anticoagulation therapy is necessary.
Components:
- C: Congestive heart failure (1 point)
- H: Hypertension (1 point)
- A₂: Age ≥ 75 years (2 points)
- D: Diabetes mellitus (1 point)
- S₂: Prior Stroke/TIA/thromboembolism (2 points)
- V: Vascular disease (1 point)
- A: Age 65-74 years (1 point)
- Sc: Sex category (female) (1 point)
How NICE uses it (NG196): offer anticoagulation at a score of 2 or more, consider it for men scoring 1, and don't offer it when the only risk factor is sex (a score of 0 for men or 1 for women).
Disclaimer
This calculator is provided for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment.
- Always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.
- Never disregard professional medical advice or delay seeking it because of information from this tool.
- Clinical decision-making should always incorporate the full clinical context, patient preferences, and local protocols.
- The creators of this tool accept no liability for decisions made based on its output.
If you are a patient: please discuss any results with your healthcare provider. This tool is designed for use by medical professionals and may not be appropriate for self-assessment.
References
- Lip GYH, Nieuwlaat R, Pisters R, Lane DA, Crijns HJGM. (2010). 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, 137(2), 263-272.
- NICE (2021). Atrial fibrillation: diagnosis and management (NG196).