Source and scope
This summary is bounded to the recommendations, population and decisions covered by 2020 acute coronary syndromes guidelines. Apply it with the current provincial or territorial pathway where implementation differs.
sources for this section:CCS ACS
Source-attributed clinical priorities
- Use symptoms, examination, a 12-lead ECG and serial cardiac troponin in an acute-coronary-syndrome pathway.
- Do not use a normal initial ECG or single early troponin to dismiss clinically concerning ischemic pain.
- Route unstable or high-risk presentations emergently; local access determines the exact observation and invasive-management pathway.
- Consider aortic, pulmonary, gastrointestinal and musculoskeletal emergencies alongside coronary ischemia.
sources for this section:CCS ACS
Practical assessment and management workflow
1
Record onset, provoking and relieving features, associated symptoms, vital signs and cardiovascular history.
2
Obtain and repeat a 12-lead ECG when ischemia remains possible.
3
Use serial high-sensitivity troponin within the locally validated rule-in and rule-out algorithm.
4
Route low-, intermediate- and high-risk patients to discharge, observation or cardiology assessment with explicit follow-up.
sources for this section:CCS ACS
Safety, red flags and urgent escalation
- Escalate ongoing pain, dynamic ECG change, arrhythmia, heart failure or hemodynamic compromise.
- A single normal ECG or early troponin does not safely exclude acute coronary syndrome.
- Avoid exercise testing when an acute syndrome or another unstable diagnosis remains possible.
sources for this section:CCS ACS
Confirm the local pathway before acting
The evidence source is pan-Canadian, but formularies, funded access, referral routes, public-health directions and service availability remain provincial or territorial.
sources for this section:CCS ACS
Source and implementation boundary
Read this educational summary with the linked source, current Canadian product information where medicines are involved, and the applicable provincial or territorial pathway. Local formularies, reporting duties, referral routes and service availability can differ.
sources for this section:CCS ACS
Source documents
Use the linked source documents for complete recommendations, evidence grading, exclusions and implementation detail.
- Canadian Cardiovascular Society2020 acute coronary syndromes guidelinesaccessed 2026-08-20view source
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