HAS-BLED Score Calculator
The HAS-BLED score is a validated tool to estimate the 1-year risk of major bleeding in patients with Atrial Fibrillation (AFib). A score of ≥3 indicates a higher risk, suggesting caution and regular clinical review.
0
Points
Risk: Low
Bleeding Rate: 1.13% per year
Clinical Guidance: Standard anticoagulation therapy typically recommended with routine monitoring.
The HAS-BLED tool is superior to the older HEMORR2HAGES or HAS-BLED 1.0 models because of its clinical simplicity. Below is the technical breakdown of how the scoring impacts clinical decision-making.
| HAS-BLED Score | Major Bleeds (per 100 pt-years) | Clinical Recommendation |
| 0 | 1.13 | High benefit-to-risk ratio for anticoagulation. |
| 1 | 1.02 | High benefit-to-risk ratio. |
| 2 | 1.88 | Moderate risk; monitor BP and INR frequently. |
| 3 | 3.74 | High Risk; Evaluate for alternatives to Warfarin (e.g., DOACs). |
| 4 | 8.70 | High Risk; Intense monitoring; consider dose adjustment. |
| 5+ | 12.50+ | Very High Risk; Re-evaluate the necessity of anticoagulation. |
