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HAS-BLED Score
Risk Factors
HAS-BLED Score
0
1.13 bleeds per 100 patient-years
About
The HAS-BLED score estimates the risk of major bleeding in patients with atrial fibrillation on anticoagulation therapy. It is used alongside the CHA₂DS₂-VASc stroke risk score to balance bleeding risk against stroke prevention benefit. A high HAS-BLED score does not contraindicate anticoagulation — rather, it highlights patients who require closer monitoring and attention to modifiable bleeding risk factors.
Formula
HAS-BLED = H + A + S + B + L + E + D (0–9)
H=Hypertension, A=Abnormal renal/liver, S=Stroke, B=Bleeding, L=Labile INR, E=Elderly, D=Drugs/alcohol
Interpretation
| HAS-BLED Score | Bleeds per 100 Patient-Years |
|---|---|
| 0 | 1.13 |
| 1 | 1.02 |
| 2 | 1.88 |
| 3 | 3.74 |
| ≥ 4 | High risk — close monitoring needed |
References
- Pisters R, et al. A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey. Chest. 2010;138(5):1093-1100.
- Lip GY, et al. Comparative validation of a novel risk score for predicting bleeding risk in anticoagulated patients with atrial fibrillation. J Am Coll Cardiol. 2011;57(2):173-180.
FAQ
Disclaimer
For educational and informational purposes only. Not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional.