Hypoxia-Ischemia, BrainAnoxiaAnimals, NewbornHypoxia, BrainIschemiaPlethysmography, Whole BodyBrain IschemiaCell HypoxiaPia MaterHypercapniaRats, Sprague-DawleyNeuroprotective AgentsMyocardial IschemiaHypotensionBrainCell DeathCerebrovascular CirculationDisease Models, AnimalRats, WistarNeuronsReperfusion InjuryApoptosisFetal HypoxiaOxygenMyocardial Reperfusion InjuryHypoxia-Inducible Factor 1, alpha SubunitCaspase 3CaspasesTime Factors