HAS-BLED Calculator

Estimates major bleeding risk in patients with atrial fibrillation receiving anticoagulation.

Hypertension (SBP >160 mmHg) Abnormal Renal Function Abnormal Liver Function History of Stroke Bleeding History or Predisposition Labile INR Age >65 Drugs (antiplatelets / NSAIDs) Alcohol Use (≥8 drinks/week)

A HAS-BLED score ≥3 indicates increased bleeding risk and the need for closer monitoring — not a contraindication to anticoagulation.