Cardiology
ORBIT Bleeding Risk Score for AF
Predicts major bleeding risk in atrial fibrillation patients on anticoagulation.
Used in: Atrial Fibrillation
Score interpretation
Low Bleeding Risk 0–2
ORBIT 0–2: 2.4 major bleeds per 100 patient-years.
→ Proceed with anticoagulation. Standard monitoring.
Medium Bleeding Risk 3
ORBIT 3: 4.7 major bleeds per 100 patient-years.
→ Anticoagulate with caution. Address modifiable risk factors. Close follow-up.
High Bleeding Risk 4–7
ORBIT 4–7: 8.1 major bleeds per 100 patient-years.
→ Carefully weigh bleeding risk vs stroke prevention benefit. Address modifiable risk factors. Consider haematology review.
Interpretation bands for the ORBIT. Apply clinical judgement and local guidance.
References
- O'Brien EC et al. The ORBIT Bleeding Score: A Simple Bedside Score to Assess Bleeding Risk in Atrial Fibrillation. Eur Heart J. 2015;36(46):3258-3264.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
- CHA₂DS₂-VASc Score · Atrial Fibrillation
- CHA₂DS₂-VA Score for AF (2023) · Atrial Fibrillation
- CHADS-65 for Atrial Fibrillation · Atrial Fibrillation
- GARFIELD-AF Risk Score for Atrial Fibrillation · Atrial Fibrillation
- CHADS-65 Score for Atrial Fibrillation · Atrial Fibrillation
- CHARGE-AF Score for Incident Atrial Fibrillation · Atrial Fibrillation
Drugs
- Bivalirudin (PCI Anticoagulation) · Direct Thrombin Inhibitor / PCI
- Vernakalant · Atrial-selective antiarrhythmic
- Vasopressin / Terlipressin · Vasopressin Analogue — Vasodilatory Shock / Variceal Bleeding
- Bivalirudin · Anticoagulation
- Tranexamic Acid (Heavy Menstrual Bleeding) · Antifibrinolytic (Gynaecological Use)
- Palivizumab · RSV Prophylaxis — Monthly Monoclonal Antibody (High-Risk Infants)
Pathways
Same specialty
- Acute Heart Failure · ESC 2021 Heart Failure Guidelines; NICE NG106
- NSTEMI / Unstable Angina · ESC 2020 NSTEMI Guidelines; NICE NG185
- New-Onset Atrial Fibrillation · ESC 2020 AF Guidelines; NICE NG196
- Hypertensive Emergency · ESC/ESH 2018 Hypertension Guidelines; NICE NG136
- Bradycardia Management · Resuscitation Council UK ABCDE; ESC 2021 Pacing Guidelines
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.