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HAS-BLED Score

Estimate the risk of major bleeding in patients on anticoagulation for atrial fibrillation.

Enter Values

Uncontrolled Hypertension

Abnormal Renal Function

Abnormal Liver Function

Stroke History

Prior Bleeding or Predisposition

Labile INR (if on Warfarin)

Age > 65 years

Antiplatelet drugs (NSAIDs, etc.)

Excessive Alcohol Intake

Result

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Formula

Point-based scoring system (0-9)

Assigns points for Hypertension, Abnormal liver/renal function, Stroke, Bleeding history, Labile INR, Elderly age, and Drugs/Alcohol.

Worked Example

Hypertension (+1), Age > 65 (+1) -> Score 2.

Frequently Asked Questions

What is a high HAS-BLED score?

A score of 3 or more indicates a high risk of major bleeding and warrants caution and regular review.

Does a high score mean no anticoagulation?

Not necessarily. It means the patient has a higher bleeding risk, so clinicians should address modifiable risk factors (like HTN or drug use) and monitor closely.

What counts as abnormal renal function?

Dialysis, transplant, or serum creatinine >= 2.26 mg/dL (200 µmol/L).

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