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Severe AR Surgical Indication — RACP Adult Medicine MCQ

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HardCardiologySevere AR Surgical IndicationRACP Adult Medicine

A patient with anterior STEMI has successful primary PCI to an occluded proximal LAD. He remains in cardiogenic shock and angiography shows severe but stable lesions in the circumflex and right coronary arteries. What is the preferred revascularisation strategy at the index procedure?

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Correct answer: DTreat the infarct-related artery only initially and plan staged assessment of non-culprit lesions

Explanation lettering: B = shown as A · A = shown as B · E = shown as D · D = shown as E

E is correct. In myocardial infarction with multivessel disease and cardiogenic shock, index-procedure PCI should be confined to the infarct-related artery; immediate non-culprit PCI increases death and renal-failure risk, with staged revascularisation considered after stabilisation. A contradicts this evidence. B routine balloon-pump support lacks survival benefit and adds bleeding. C physiology is unreliable in shock and does not justify immediate multivessel PCI. D is not indicated after successful culprit PCI without a separate surgical emergency.

Reference: Heart Foundation and CSANZ, Australian clinical guideline for diagnosing and managing acute coronary syndromes 2025: https://www.heartfoundation.org.au/for-professionals/acs-guideline?tab=3