Fig. 2. The effect of dexmedetomidine on cerebral blood flow velocity (CBFV; cm/s) and cerebral metabolic rate equivalent (CMRe). Data are presented as mean ± SD . *P < 0.05 versus presedation (PreSed). +P < 0.05 versus 0.6 ng/ml. ˆP < 0.05 versus 1.2 ng/ml. Recovery = 30 min after discontinuation of dexmedetomidine infusion.