HAS-BLED

1-year major bleeding risk on anticoagulation in atrial fibrillation.

Use: Clinician toolApplies to: AF on anticoagulationSource: Pisters et al, 2010

Hypertension (uncontrolled)Systolic BP > 160 mmHg

Abnormal renal functionDialysis, transplant, or creatinine ≥ 200 µmol/L

Abnormal liver functionCirrhosis, or bilirubin > 2× ULN with AST/ALT/ALP > 3× ULN

StrokePrior history of stroke

BleedingPrior major bleed, predisposition, or anaemia

Labile INRTime in therapeutic range < 60% (warfarin only)

ElderlyAge > 65 years

DrugsConcomitant antiplatelet or NSAID

Alcohol≥ 8 standard drinks per week

Score

0 / 9

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Not a reason to withhold anticoagulation. HAS-BLED is designed to surface modifiable bleeding risk and prompt closer review — most patients with a high score still benefit from anticoagulation once those factors are addressed.

For health-professional use. A scoring aid — not a substitute for clinical judgement or current guidelines.