Randomization
Randomization was carried out through a random number generator, by
means of repetitions divided into two treatments, using R-2.15.1
Statistics . Treatment assignments were performed at random according to
a blocked randomization by the researchers allowed to use the program
with a username and password, Group Esmolol (ESM) 0,5mg / kg, Group
Dexmedetomidine (DEX) group 0,5-0,8µcg / kg / h.