Hypoxia-Ischemia, BrainAnoxiaAnimals, NewbornHypoxia, BrainIschemiaPlethysmography, Whole BodyBrain IschemiaCell HypoxiaPia MaterHypercapniaNeuroprotective AgentsRats, Sprague-DawleyMyocardial IschemiaHypotensionBrainCerebrovascular CirculationCell DeathDisease Models, AnimalRats, WistarNeuronsReperfusion InjuryApoptosisFetal HypoxiaOxygenMyocardial Reperfusion InjuryHypoxia-Inducible Factor 1, alpha Subunit