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To determine âcessation of all functions of the entire brain, including the brain stem,â physicians must determine the presence of unresponsive coma, the absence of brainstem reflexes, and the absence of respiratory drive after a CO 2 challenge.
Pulseless arrest rhythms are divided into shockable and nonshockable. Shockable rhythms are VF or ventricular tachycardia (VT). If VT/VF persists after the first shock and 5 cycles or 2 minutes, then give another shock, resume CPR, and obtain intravenous (IV) access.The IV access should be obtained and should be peripheral or interosseous (IO) and not interfere with chest compressions.hockable rhythms are VF or ventricular tachycardia (VT). If VT/VF persists after the first shock and 5 cycles or 2 minutes, then give another shock, resume CPR, and obtain intravenous (IV) access. The IV access should be obtained and should be peripheral or interosseous (IO) and not interfere with chest compressions.