Hypokalaemia ECG — RACP Adult Medicine MCQ

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EasyCardiologyHypokalaemia ECGRACP Adult Medicine

A 40-year-old woman: muscle weakness, polyuria, prolonged QT, flattened T waves, prominent U waves. What electrolyte abnormality?

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Correct answer: D — Hypokalaemia

Flattened T waves, U waves, ST depression, prolonged QT = hypokalaemia. Severe: TdP, VF risk. Correct Mg²⁺ concurrently.

Reference: eTG – 2025 – Cardiovascular; AMH – 2025