PEA
CPR, Intubate, IV, assess blood flow with Doppler or ECHO (if available)
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Consider hypovolemia, hypoxia, cardiac tamponade, tension pneumothorax, hypothermia, massive PE, cocaine, b-blocker, Ca channel blocker, TCA, hyperkalemia, acidosis, massive MI
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Epinephrine I mg IV/ET q3~5 min
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Atropine 1 mg IV if HR< 60 b/min q3-5 min to total of 0.04 mg/kg