Type 2 Myocardial Infarction — RACP Adult Medicine MCQ
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Correct answer: D — Acute non-ischaemic myocardial injury unless objective evidence of myocardial ischaemia emerges
The best answer is “Acute non-ischaemic myocardial injury unless objective evidence of myocardial ischaemia emerges”. A changing troponin concentration supports acute myocardial injury, but myocardial infarction additionally requires clinical, ECG, imaging or angiographic evidence of myocardial ischaemia. Sepsis alone does not establish type 2 infarction, and global rather than regional dysfunction does not define STEMI. A lower second concentration does not make the injury chronic.
Reference: Heart Foundation and CSANZ, Australian acute coronary syndromes guideline 2025: https://www.heartfoundation.org.au/for-professionals/acs-guideline