HAS-BLED Score Calculator

HAS-BLED Score Calculator — Assess Bleeding Risk in Atrial Fibrillation Patients

Calculate the HAS-BLED score to assess bleeding risk in patients with atrial fibrillation. Determine appropriate anticoagulation therapy management.

Step 1: Clinical History

Hypertension – Uncontrolled, SBP >160 mmHg

Abnormal Renal Function – Dialysis, transplant, or Cr >2.26 mg/dL

Abnormal Liver Function – Cirrhosis or bilirubin >2x normal

Stroke History – Prior stroke

Bleeding History or Predisposition – Prior bleeding or anemia

Understanding HAS-BLED

The HAS-BLED score estimates the risk of major bleeding for patients on anticoagulation therapy for atrial fibrillation. One point is assigned for each risk factor present.

Step 2: Additional Factors

Labile INR – Unstable/high INRs or time in therapeutic range <60%

Elderly – Age >65 years

Drugs/Alcohol – Antiplatelet/NSAID use or alcohol abuse

Patient Age (years)

Systolic Blood Pressure (mmHg)

140

About HAS-BLED Score

A score of 0-2 indicates low to moderate bleeding risk. A score of ≥3 indicates high bleeding risk, suggesting caution and regular review of anticoagulation therapy.

HAS-BLED Score Results

Summary

Risk Assessment

Clinical Recommendations

HAS-BLED Score

Low Bleeding Risk

Low Risk

Major Bleeding Risk (Annual)

1.13%

Risk Factors Present

0 of 9

Suggested Monitoring

Annual Review

Score Interpretation

Safe for Anticoagulation

Bleeding Risk Assessment

HAS-BLED Score	Bleeding Risk Category	Major Bleeding (per 100 patient-years)	Clinical Implication

Risk Interpretation

High HAS-BLED scores (≥3) indicate increased bleeding risk but do not preclude anticoagulation. They suggest the need for regular review, correction of modifiable risk factors, and careful monitoring.

Clinical Recommendations

For Score 0-2

Low-Moderate Risk

Standard anticoagulation therapy is appropriate with annual review.

For Score ≥3

High Risk

Increased caution, regular review (every 3-6 months), and address modifiable risk factors.

Modifiable Risk Factors

Addressing Bleeding Risk

Uncontrolled hypertension, labile INR, concurrent use of antiplatelet/NSAID drugs, and alcohol abuse are modifiable risk factors that should be addressed to reduce bleeding risk.

HAS-BLED Score Calculation

HAS-BLED Acronym

Hypertension, Abnormal renal/liver function, Stroke, Bleeding history, Labile INR, Elderly, Drugs/alcohol. Each factor scores 1 point.

Need Clinical Consultation?

This calculator is for educational purposes only. Always consult a healthcare professional for medical decisions regarding anticoagulation therapy and bleeding risk assessment.

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