Stroke Risk Calculator
CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk
For Non-Valvular Atrial Fibrillation Only
This calculator is intended for patients with non-valvular atrial fibrillation (AF). It is not applicable for patients with mechanical heart valves or moderate-to-severe mitral stenosis.
Age 65-74 adds 1 point; Age ≥75 adds 2 points
Enter patient details to calculate stroke risk
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Your data is calculated locally in your browser and is never stored on our servers.
Read full medical disclaimer →About the CHA₂DS₂-VASc Score
What is it?
Estimates stroke risk in patients with atrial fibrillation (AF) to guide anticoagulation therapy decisions.
Applicable To
- Adult patients with non-valvular atrial fibrillation
- Patients with atrial flutter
Not Applicable To
- Patients with mechanical heart valves
- Patients with moderate-to-severe mitral stenosis
- Patients already on anticoagulation for other reasons
Clinical Notes
- A score of 0 in males or 1 in females suggests low risk
- Female sex only adds a point if other risk factors are present
- Score should be reassessed periodically as risk factors may change
- Consider bleeding risk (HAS-BLED score) when deciding on anticoagulation
Sources
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