Bleeding Risk in Atrial Fibrillation: HAS-BLED Score

Understand the risk of bleeding from anticoagulation in atrial fibrillation

The global unit selector only affects unanswered questions
1.Hypertension (sBP > 160 mm Hg)?
2.Abnormal Renal Function?
3.Abnormal Liver Function?
5.Previous Stroke?
6.Prior Major Bleeding or Predisposition?
7.Labile INR (<60% of time in therapeutic range)?
8.Taking Drugs Predisposing to Bleeding?
9.Alcohol Use?
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1. Hypertension (sBP > 160 mm Hg)?

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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.


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