Many conditions raise troponin. The question is whether this is a type 1 myocardial infarction.
Judge the change between samples, not a single value, alongside the symptoms and ECG.
Act now
- 1
Ischaemic ECG changes or ongoing pain: follow the Acute coronary syndrome topic.
Assess
- Ischaemic symptoms? Review a 12-lead ECG now and compare with old ones.
- Other causes of myocardial injury: sepsis, PE, tachyarrhythmia, heart failure, myocarditis, CKD, stroke or subarachnoid haemorrhage, anaemia, hypotension, after surgery.
Investigations
- Repeat high-sensitivity troponin per your local 0/1-hour or 0/3-hour pathway.
- FBC, U&E, CRP, NT-proBNP; echo; CTPA if PE is suspected.
Manage
- Rise or fall with ischaemic symptoms or ECG changes: myocardial infarction — ACS pathway and cardiology.
- Stable raised values without symptoms (e.g. CKD): chronic myocardial injury — treat the underlying condition.
- Supply–demand mismatch (type 2): treat the trigger. Antiplatelets are not automatic — discuss with a senior.
Escalate when
- Dynamic ECG changes, ongoing pain, a significant rise, or haemodynamic instability: senior and cardiology.
Written to current guidance (NICE DG40, NG185, CG95) · sources checked 14 Nov 2026. We watch NICE for updates weekly.
Sources (3)
- NICE DG40 — High-sensitivity troponin tests for early rule-out of NSTEMIVersion 26 Aug 2020, checked 14 Nov 2026
- NICE NG185 — Acute coronary syndromesVersion 18 Nov 2020, checked 14 Nov 2026
- NICE CG95 — Recent-onset chest pain of suspected cardiac originVersion 30 Nov 2016, checked 14 Nov 2026
Reviewed by Aboodee Alhasso, MPharm MRCPharm IP on 14 Nov 2026
Calculators for this
For healthcare professionals, as an aid to clinical judgement — not a substitute for it. Follow your local policy and ask a senior when in doubt.