Cardiology
CHADS-65 for Atrial Fibrillation
Canadian Cardiovascular Society (CCS) simplified guideline for anticoagulation in AF. Age ≥65 or CHADS2 ≥1 → anticoagulate.
Used in: Atrial Fibrillation
Score interpretation
Low Risk — No Anticoagulation 0
Age < 65 AND CHADS2 score = 0: Low risk. No anticoagulation recommended.
→ No anticoagulation. Consider aspirin only if patient preference. Annual reassessment.
Anticoagulation Recommended 1–8
Age ≥ 65 OR CHADS2 ≥ 1: Anticoagulation recommended per CCS guidelines.
→ Initiate anticoagulation (DOAC preferred). Address bleeding risk factors.
Interpretation bands for the CHADS-65. Apply clinical judgement and local guidance.
References
- Verma A et al. 2014 Focused Update of the Canadian Cardiovascular Society Guidelines for the Management of Atrial Fibrillation. Can J Cardiol. 2014;30(10):1114-1130.
Related
Curated clinical cross-links plus same-class fallbacks.
Calculators
- CHA₂DS₂-VASc Score · Atrial Fibrillation
- ORBIT Bleeding Risk Score for AF · Atrial Fibrillation
- CHA₂DS₂-VA Score for AF (2023) · 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
Pathways
- 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
- Ventricular Tachycardia / Fibrillation · Resuscitation Council UK ACLS; ESC 2022 Ventricular Arrhythmia Guidelines
Decision support only — verify against a current formulary, NICE, or your local guideline before clinical use.