Cardiology · Hematology · Internal Medicine
HAS-BLED calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
0
HAS-BLED total (0–9)
Identify and correct modifiable bleeding risks and increase review frequency when risk is high; do not use the score alone to withhold anticoagulation.
Formula inputs
- Uncontrolled hypertension, systolic BP >160 mmHg (+1)
- Abnormal renal function (+1)
- Abnormal liver function (+1)
- Previous stroke (+1)
- Bleeding history or predisposition (+1)
- Labile INR (+1)
- Age >65 years (+1)
- Drugs predisposing to bleeding (+1)
- Alcohol excess, >8 units/week (+1)
Primary source
Pisters R et al. A novel user-friendly score to assess one-year risk of major bleeding in atrial fibrillation. Chest (2010)
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