Printed on 2/13/2026
For informational purposes only. This is not medical advice.
The HAS-BLED score estimates the risk of major bleeding in patients with atrial fibrillation who are on or being considered for anticoagulation therapy. It is meant to be used alongside the CHA₂DS₂-VASc score to weigh stroke prevention benefits against bleeding risk. A high HAS-BLED score does not contraindicate anticoagulation but highlights the need for careful monitoring.
Formula: Score = H(1) + A(1+1) + S(1) + B(1) + L(1) + E(1) + D(1+1)
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
Calculate the CHA₂DS₂-VASc score to estimate stroke risk in patients with atrial fibrillation and guide anticoagulation therapy decisions.
CardiologyCalculate the HEART Score to assess the risk of major adverse cardiac events (MACE) in patients presenting with chest pain.
HAS-BLED estimates the 1-year risk of major bleeding in patients with atrial fibrillation. Each letter represents a risk factor: Hypertension, Abnormal renal/liver function, Stroke, Bleeding history, Labile INR, Elderly (>65), Drugs/Alcohol. Scores range from 0 to 9.
A score ≥ 3 indicates high risk of major bleeding. However, a high score does not mean anticoagulation should be stopped — it means modifiable risk factors should be addressed and the patient should be monitored more closely.
No. A high HAS-BLED score is not a contraindication to anticoagulation. Studies show that patients with high CHA₂DS₂-VASc AND high HAS-BLED scores still benefit from anticoagulation. Focus on correcting modifiable risk factors (blood pressure control, limiting alcohol, stopping unnecessary NSAIDs).
Bleeding risk should be reassessed periodically, typically at each clinic visit or at least annually. Risk factors can change over time, and ongoing reassessment helps optimize the balance between stroke prevention and bleeding risk.