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Severe hyperkalaemia with ECG changes — RCPSC EM MCQ

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HardCardiovascular emergenciesSevere hyperkalaemia with ECG changesRCPSC EM

A 76-year-old man presents CTAS 1 with weakness and near-syncope. ECG shows a sine-wave pattern, HR is 38, BP is 86/52, potassium is 7.4 mmol/L, and creatinine is 390 µmol/L. He takes ramipril and spironolactone. What is the most appropriate next step?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: EGive IV calcium, then insulin-dextrose and potassium removal therapy

Hyperkalaemia with life-threatening ECG changes requires immediate myocardial membrane stabilisation with IV calcium, then intracellular shift and definitive potassium removal.

Reference: ACLS/ATLS/PALS principles adapted to Canadian ED practice