HAS-BLED Score (Bleeding Risk in Atrial Fibrillation)

Estimates one-year major bleeding risk in patients with atrial fibrillation on anticoagulation. Used alongside CHADS2-VASc to guide anticoagulation decisions.

Hypertension (SBP > 160 mmHg) *

Hypertension (SBP > 160 mmHg)

Uncontrolled hypertension with systolic BP > 160 mmHg

Abnormal Renal Function *

Abnormal Renal Function

Dialysis, renal transplant, or serum creatinine >= 200 micromol/L (>=2.3 mg/dL)

Abnormal Liver Function *

Abnormal Liver Function

Chronic liver disease (cirrhosis) or bilirubin >2x ULN with AST/ALT/ALP >3x ULN

Prior Stroke *

Prior Stroke

History of stroke

Bleeding History or Predisposition *

Bleeding History or Predisposition

Prior major bleeding, anemia, or bleeding diathesis

Labile INR *

Labile INR

Time in therapeutic range < 60% (for patients on warfarin)

Elderly (>65 years) *

Elderly (>65 years)

Concomitant Drugs (Antiplatelet/NSAIDs) *

Concomitant Drugs (Antiplatelet/NSAIDs)

Aspirin, clopidogrel, NSAIDs that increase bleeding risk

Alcohol Abuse (>=8 drinks/week) *

Alcohol Abuse (>=8 drinks/week)

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