🫀 CHADS-65 (CCS AF Antithrombotic)
UseWhen to use: nonvalvular AF/flutter when following Canadian Cardiovascular Society guidance.
StrataWhen OAC indicated, DOAC usually preferred; assess bleed risk and preference. Explicitly Canadian CCS (intl_p…
LimitsWhen not to use: valvular AF / mechanical valves. · Pitfall: overriding China CHA₂DS₂-VASc-based pathways with CCS alone. · Cannot: replace China AF anticoagulation decisions or skip bleed asse…
SourceCCS CHADS-65 antithrombotic algorithm
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
Age≥65 or CHADS₂→OAC.
When to use
When to use: nonvalvular AF/flutter when following Canadian Cardiovascular Society guidance.
How it works
OAC if age ≥65 or any CHADS₂ factor; else ASA if vascular disease; else none.
Key points
- Age≥65 or CHADS₂→OAC.
- Low-risk vascular→ASA.
- Next: HAS-BLED / DOAC choice.
References
- [Guideline / primary source]CCS CHADS-65 antithrombotic algorithm
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Age ≥65 years | No (<65) |
|---|---|
| Heart failure (CHADS₂) | No |
| Hypertension | No |
| Diabetes mellitus | No |
| Prior stroke / TIA / systemic embolism | No |
| CAD / PAD / vascular disease (if age <65 & CHADS₂=0) | No |
→CHADS-65 cueNone
- Age ≥65：No
- CHADS₂ factors (HF/HTN/DM/stroke)：0
- Recommendation：Age <65 and CHADS₂=0 without vascular disease — no antithrombotic for AF stroke prevention per CHADS-65.
| Age ≥65 years | Yes (≥65) |
|---|---|
| Heart failure (CHADS₂) | Yes |
| Hypertension | Yes |
| Diabetes mellitus | Yes |
| Prior stroke / TIA / systemic embolism | Yes |
| CAD / PAD / vascular disease (if age <65 & CHADS₂=0) | Yes |
→CHADS-65 cueOAC
- Age ≥65：Yes
- CHADS₂ factors (HF/HTN/DM/stroke)：4
- Recommendation：Oral anticoagulation recommended (DOAC preferred over warfarin for most NVAF); reassess bleeding risk.
Verification & sources · governance
FAQ
Frequently asked questions
- Does CHADS-65 (CCS AF Antithrombotic) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is CHADS-65 (CCS AF Antithrombotic) calculated in practice? Can you show a worked example?
- Inputs: Age ≥65 years No (<65), Heart failure (CHADS₂) No, Hypertension No, Diabetes mellitus No, Prior stroke / TIA / systemic embolism No, CAD / PAD / vascular disease (if age <65 & CHADS₂=0) No → Result: CHADS-65 cue None（Age ≥65: No, CHADS₂ factors (HF/HTN/DM/stroke): 0, Recommendation: Age <65 and CHADS₂=0 without vascular disease — no antithrombotic for AF stroke prevention per CHADS-65.） Inputs: Age ≥65 years Yes (≥65), Heart failure (CHADS₂) Yes, Hypertension Yes, Diabetes mellitus Yes, Prior stroke / TIA / systemic embolism Yes, CAD / PAD / vascular disease (if age <65 & CHADS₂=0) Yes → Result: CHADS-65 cue OAC（Age ≥65: Yes, CHADS₂ factors (HF/HTN/DM/stroke): 4, Recommendation: Oral anticoagulation recommended (DOAC preferred over warfarin for most NVAF); reassess bleeding risk.）