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The percent change in the middle (%ΔMCAv) and posterior (%ΔPCAv) cerebral artery velocities, internal (%ΔQICA) and vertebral (%ΔQVA) artery blood flows, and global cerebral blood flow (%ΔgCBF) during hyperoxia compared with normoxia with (isocapnic) or without (poikilocapnic) PetCO2 controlled at basal values. †P < 0.05, significant differences between normoxia and hyperoxia.
