CHADS₂ calculator
Result
0points
Annual stroke risk ~1.9%
CHA₂DS₂-VASc is preferred for all new assessments.
How to use it
- 1
Score each criterion. CHF, HTN, age ≥75, DM each score 1. Prior stroke/TIA scores 2.
- 2
Interpret. Score 0 = low (aspirin optional), 1 = moderate, ≥2 = anticoagulate.
- 3
Note. CHA₂DS₂-VASc is now the standard tool; CHADS₂ retained for historical comparison.
When to use it
- Historical comparison
- Some older trials and guidelines reference CHADS₂; use CHA₂DS₂-VASc for clinical decisions.
- Rapid bedside estimation
- 5-criterion simplicity aids quick estimation in resource-limited settings.
- When NOT to use
- Use CHA₂DS₂-VASc for all new anticoagulation decisions.
A reference for clinicians and students, not medical advice. A score supports a decision; it does not make one. Check every result against the patient in front of you and your local protocol.
At a glance
- Specialty
- Cardiology
- Inputs
- 5
- Type
- Points score
