VF cardiac arrest — MCCQE Part 1 MCQ

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EasyLoss of Consciousness/SyncopeVF cardiac arrestMCCQE Part 1

A 40-year-old man has witnessed cardiac arrest. Bystander CPR started. Initial rhythm: VF. Most appropriate immediate action?

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Correct answer: D — Defibrillation then 2 min CPR

VF = shockable. Immediate defibrillation. Epinephrine after 2nd shock. Amiodarone after 3rd shock. Every minute of delay reduces survival 7-10%.

Reference: Heart and Stroke Foundation of Canada / ACLS