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Use this calculator to calculate HAS-BLED score and risk of major bleeding with anticoagulation in atrial fibrillation.
About this calculator
The HAS-BLED score was derived from a real-world cohort of 3978 with AF and assesses the 1-year risk for major bleeding (intracranial, hospitalization, hemoglobin decrease > 2 g/L, and/or transfusion) associated with oral anticoagulation. Patients with a high risk of bleeding (HAS-BLED score >/= 3) should undergo regular clinical review following the initiation of oral anticoagulation.
“HAS-BLED” is an acronym for:
- Abnormal Liver/Renal Function
- Stroke History
- Bleeding Predisposition
- Labile INRs
- “Elderly” (Age > 65)
- Drugs/Alcohol Usage
The HAS-BLED score can be used in conjunction with the CHA2DS2-VASc score to estimate risk of stroke in atrial fibrillation.
Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GY. A novel user-friendly score (HAS-BLED) to assess one-year risk of major bleeding in atrial fibrillation patients: The Euro Heart Survey. Chest. 2010 Mar 18
QxMD Cardiology contributing author: Dr. Jason Andrade, MD, FRCP(C)