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HAS-BLED Score Calculator

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

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Hypertension (uncontrolled, >160 mmHg systolic), Abnormal Renal Function (dialysis, transplant, or creatinine > 200), Abnormal Liver Function (bilirubin > 2x ULN, AST/ALT/ALP > 3x ULN), Stroke, Bleeding History or Predisposition to Bleeding, Labile INRs (unstable, high INRs), Elderly (age > 65 years), Drugs (NSAIDs, antiplatelets), and Alcohol Abuse in the units shown.

Step 2

Read Total HAS-BLED Score, Risk Category, and Estimated Annual Bleeding Risk (%) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Ideal Patient

Hypertension (uncontrolled, >160 mmHg systolic): No; Abnormal Renal Function (dialysis, transplant, or creatinine > 200): No; Abnormal Liver Function (bilirubin > 2x ULN, AST/ALT/ALP > 3x ULN): No; Stroke: No; Bleeding History or Predisposition to Bleeding: No; Labile INRs (unstable, high INRs): No; Elderly (age > 65 years): No; Drugs (NSAIDs, antiplatelets): No; Alcohol Abuse: No

Total HAS-BLED Score: 0; Risk Category: Low to Moderate Risk; Estimated Annual Bleeding Risk (%): 1

Hypertension Only

Hypertension (uncontrolled, >160 mmHg systolic): Yes; Abnormal Renal Function (dialysis, transplant, or creatinine > 200): No; Abnormal Liver Function (bilirubin > 2x ULN, AST/ALT/ALP > 3x ULN): No; Stroke: No; Bleeding History or Predisposition to Bleeding: No; Labile INRs (unstable, high INRs): No; Elderly (age > 65 years): No; Drugs (NSAIDs, antiplatelets): No; Alcohol Abuse: No

Total HAS-BLED Score: 1; Risk Category: Low to Moderate Risk; Estimated Annual Bleeding Risk (%): 1.9

Stroke History

Hypertension (uncontrolled, >160 mmHg systolic): No; Abnormal Renal Function (dialysis, transplant, or creatinine > 200): No; Abnormal Liver Function (bilirubin > 2x ULN, AST/ALT/ALP > 3x ULN): No; Stroke: Yes; Bleeding History or Predisposition to Bleeding: No; Labile INRs (unstable, high INRs): No; Elderly (age > 65 years): No; Drugs (NSAIDs, antiplatelets): No; Alcohol Abuse: No

Total HAS-BLED Score: 1; Risk Category: Low to Moderate Risk; Estimated Annual Bleeding Risk (%): 1.9

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.