Plasma malondialdehyde (MDA) levels during reperfusion in the various experimental groups. Data are presented mean ± SD. HG + Diaz = hyperglycemia + diazoxide; HG + I/R = hyperglycemia + ischemia–reperfusion; HG + ISO = hyperglycemia + isoflurane postconditioning; HG + ISO + Diaz = diazoxide administration to isoflurane-postconditioned rabbits in the presence of hyperglycemia; I/R = ischemia–reperfusion; ISO = isoflurane postconditioning. *P < 0.05 compared with I/R group; #P < 0.05 compared with the HG + ISO group.