Reperfusion InjuryIschemic PostconditioningMyocardial Reperfusion InjuryBrain IschemiaDisease Models, AnimalIschemic PreconditioningCerebral InfarctionInfarction, Middle Cerebral ArteryReperfusionRats, Sprague-DawleyRats, WistarMyocardial ReperfusionMyocardiumAcute DiseaseCerebral ArteriesOxidative StressCerebrovascular CirculationWounds and InjuriesBrainTime FactorsCerebral AngiographyBrain InjuriesMiddle Cerebral ArteryBrain EdemaIschemic Attack, TransientMyocardial IschemiaCerebral HemorrhageIschemic Preconditioning, MyocardialIschemia