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Recent-onset atrial fibrillation — RCPSC EM MCQ

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ModerateCardiovascular emergenciesRecent-onset atrial fibrillationRCPSC EM

A 66-year-old with AF for 20 hours has palpitations and mild dyspnoea. BP 134/78, no heart failure, no chest pain, normal electrolytes, and he has no anticoagulation contraindication. What is the most appropriate next step?

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

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Correct answer: BUse an ED cardioversion pathway with shared decision-making and anticoagulation assessment

Stable recent-onset AF can be managed with rate or rhythm control; Canadian ED pathways support cardioversion in selected patients with anticoagulation and stroke-risk assessment.

Reference: CAEP Acute Atrial Fibrillation/Flutter Best Practices Checklist, 2021