HAS-BLED score Calculator
Assessment of bleeding risk with anticoagulation in atrial fibrillation patients.
Click the relevant items and the score will be calculated automatically.
*Hypertension : SBP ＞ 160
*Abnormal renal function : Dialysis, kidney transplant, or Cr ＞ 2.26 mg/dL
*Abnormal liver function : Cirrhosis, TB ≥ 2× normal, or AST/ALT/ALP ≥ 3× normal
*Bleeding : previous bleeding history and/or predisposition to bleeding
*Labile INRs : unstable/high INRs or poor time in therapeutic range (＜60%)
*Drugs : Medications increasing bleeding risk (e.g., aspirin, antiplatelets, NSAIDs)
*Alcohol : Alcohol abuse (≥ 8 drinks/week)
0~1 points : Relatively low Risk
2 points : Moderate Risk
3~5 points : High Risk
＞5 points : Very high Risk
The HAS-BLED bleeding risk score can be used in clinical practice to easily assess the bleeding risk associated with anticoagulant use in patients with non-valvular atrial fibrillation. However, even for patients at high risk of bleeding, anticoagulants are not absolutely contraindicated. It is recommended to actively correct modifiable bleeding risk factors when using anticoagulant therapy.