Cardiology

ORBIT Bleeding Risk Score for Anticoagulation in Atrial Fibrillation

Calculates the 5-item ORBIT bleeding score to stratify major hemorrhage risk on DOACs or Warfarin.

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Parameters

ORBIT Bleeding Risk Score for Anticoagulation in Atrial Fibrillation Result

Formula

ORBIT Score = Older age ≥74 (1) + Renal eGFR <60 (1) + Bleeding history (2) + Insufficient Hgb/Anemia (2) + Antiplatelet treatment (1)
Range: 0 to 7 points

Clinical Pearls

A simpler, more accurate bleeding score than HAS-BLED in contemporary DOAC-treated atrial fibrillation populations.

Limitations

Calculates baseline annual major bleeding risk; does not predict minor superficial bruising or localized epistaxis.