HAS-BLED Score
Bleeding risk on anticoagulation in atrial fibrillation.
Risk Factors
Uncontrolled SBP >160 mmHg
1 point each: Dialysis/Cr>2.3, cirrhosis/bili>2×/AST/ALT>3×
Prior stroke history
Prior major bleeding or predisposition
Unstable/high INRs, TTR <60%
Age greater than 65 years
1 point each: Antiplatelets/NSAIDs, alcohol ≥8 drinks/week
0 / 9
Annual Major Bleeding: 1.0%
Low Risk
Continue anticoagulation as indicated by CHA₂DS₂-VASc.
Remember: High HAS-BLED does NOT contraindicate anticoagulation. It identifies patients needing closer follow-up and risk factor modification.
About the HAS-BLED Calculator
Estimates bleeding risk in atrial fibrillation patients on anticoagulation using the HAS-BLED score.
Use alongside CHA₂DS₂-VASc when deciding on anticoagulation — high HAS-BLED does not contraindicate therapy but signals need for monitoring.
A HAS-BLED score ≥3 indicates high bleeding risk; address modifiable factors like uncontrolled hypertension.
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