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Figure 1 Experimental procedures. DF = defibrillation; Drug = either alphaMNE, epinephrine or saline placebo; FiO₂ = inspired oxygen fraction; MV = mechanical ventilation; PC = precordial compression; VF = ventricular fibrillation. *For alpha₂-receptor block (only in the group of animals which received alpha-methylnorepinephrine during cardiopulmonary resuscitation).