CHADS₂ stroke risk in atrial fibrillation
The original 5-item stroke risk score for nonvalvular atrial fibrillation.
Inputs
Congestive heart failure
Hypertension
Age 75 or older
Diabetes
Prior stroke or TIA
Worked calculation
Your values are highlighted.
- Points
When to use
- Comparing with older literature or protocols that use CHADS₂.
Pearls and pitfalls
- CHA₂DS₂-VASc is preferred by current guidelines because it better identifies truly low-risk patients.
Why use
Still cited in trials and older protocols.
| Criterion | Points |
|---|---|
| Congestive heart failure | +1 |
| Hypertension | +1 |
| Age 75 or older | +1 |
| Diabetes | +1 |
| Prior stroke or TIA | +2 |
Use CHA₂DS₂-VASc for current treatment decisions.