Torsades de pointes — DipIMC MCQ

Correct answer: D — Magnesium sulfate 2 g IV

Option D is correct because Torsades de pointes associated with prolonged QT is treated with IV magnesium and correction of causes. Option E is less appropriate because that dose is an ALS cardiac-arrest dose and is unsafe for this non-arrest indication; option C is less appropriate because aspirin is useful in ACS but inappropriate for this presentation. Option A is less appropriate because untitrated opioid dosing can cause avoidable hypotension or respiratory depression; option B is less appropriate because steroids have delayed onset and should not replace the immediate treatment. Clinical pearl: in DipIMC-style questions, the best answer is the intervention that changes outcome earliest in the pre-hospital phase.

Reference: Resuscitation Council UK Guidelines