You are the first on the scene of a 72-year-old patient in cardiac arrest. You have your medical supply kit, oxygen, and an AED. At least 4 to 5 minutes of high-quality CPR has been provided by the police officer who arrived before you. You have confirmed an open airway, apnea, and pulselessness. Which of the following should you do next?A) Perform one-rescuer CPR until additional personnel arrive.B) Apply the defibrillator pads and shock as indicated.C) Perform bag-valve-mask ventilations with supplemental oxygen for 30 seconds before applying the defibrillator pads.D) Contact medical direction before taking any action.

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