Chest Pain & Acute Coronary Syndromes
Distinguish immediately dangerous chest pain and interpret ECGs and troponin within a time-sensitive clinical pathway.
Quick revision ↓ Medical Dictionary
01Recognise the dangerous differential
Chest pain assessment must consider acute coronary syndromes, aortic dissection, pulmonary embolism, tension pneumothorax and other serious causes. Character, onset, radiation, associated breathlessness, sweating and collapse guide probability but do not independently exclude disease. Older adults and people with diabetes may have less typical presentations. Examine perfusion, pulses, lungs and cardiac signs while arranging urgent monitoring and a twelve-lead ECG.
02Interpret the ECG in context
An ECG can identify ST-elevation, ischaemia, arrhythmia or another explanation, but a normal initial tracing does not rule out acute coronary syndrome. Repeat it with recurrent symptoms or evolving concern and compare prior recordings when available. Suspected acute coronary occlusion needs immediate senior and reperfusion-pathway assessment. Do not wait for a troponin result to act on a clear time-critical ECG and clinical presentation.
03Understand myocardial injury
A troponin above the assay's reference limit indicates myocardial injury, not automatically plaque-rupture infarction. Acute infarction requires an appropriate rise or fall and evidence of ischaemia. Sepsis, myocarditis, tachyarrhythmia and other conditions can elevate troponin. Use a validated assay-specific serial pathway, symptom timing and renal context. A single early negative sample is not a universal rule-out test.
04Immediate management priorities
Use the acute coronary syndrome pathway with prompt specialist involvement, antiplatelet treatment when appropriate and a strategy determined by ECG, risk and contraindications. Check bleeding risk and alternative diagnoses, particularly suspected dissection. Oxygen is for hypoxaemia or another indication rather than every patient with pain. Reperfusion choices depend on presentation, elapsed time, service capability and eligibility; unnecessary delays worsen myocardial loss.
05After the acute episode
Review ventricular function, complications, medicines and the patient's understanding before discharge. Secondary prevention includes appropriate lipid lowering, antithrombotic planning, smoking cessation, rehabilitation and management of blood pressure and diabetes. Explain recurrence symptoms and when to seek emergency help. Adherence barriers, medication interactions and bleeding precautions need practical discussion, with a clear follow-up plan rather than a list of drugs alone.
High-Yield Revision
- A normal initial ECG does not exclude acute coronary syndrome.
- Troponin elevation means injury; the mechanism still needs assessment.
- A clear reperfusion emergency should not wait for routine blood results.
Common Pitfalls
- Do not give antithrombotic treatment reflexively when dissection is suspected.
- Do not use one early negative troponin outside a validated pathway.
References & Further Reading
Read the relevant guideline sections alongside these original clinical teaching cases. Local pathways, available services and individual patient factors determine care.
Reference review: 27 September 2026. Consult current local protocols for prescribing, procedures and escalation.