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MediumEmergencyCardiac arrest defibrillationau-acemau-amc

A 52-year-old man collapses at home and is found unresponsive and not breathing normally. Bystander CPR is commenced and paramedics arrive to find a shockable ventricular fibrillation rhythm. According to ANZCOR adult advanced life support guidelines using a biphasic defibrillator, what energy should be used for the first shock?

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