MSRA-1949

A 5-year-old girl is brought to the emergency room by her father. She has been lethargic and feverish for the past 2 hours. While waiting to be seen, she becomes unconscious. A physician performs an urgent evaluation while the nurse contacts 911. The child is not breathing, so 5 rescue breaths are administered. As you enter the room, the physician cannot detect a pulse in the brachial or carotid artery. What is the best course of action?