Circulatory Arrest, Deep Hypothermia InducedHeart Arrest, InducedHypothermia, InducedCardiopulmonary BypassRewarmingHypothermiaAortic Aneurysm, ThoracicEndarterectomyAorta, ThoracicHypoxia, BrainMonitoring, IntraoperativeBody TemperatureAneurysm, DissectingBlood Gas Monitoring, TranscutaneousBlood Gas AnalysisHeart Defects, CongenitalPerfusionAortic AneurysmCardiac Surgical ProceduresSwineCerebrovascular CirculationTime FactorsOrgan PreservationBlood Vessel Prosthesis ImplantationBrainSpectroscopy, Near-InfraredOxygenTreatment OutcomeBody Temperature RegulationElectroencephalographyPostoperative ComplicationsInfant, NewbornAnimals, NewbornTissue PreservationCold TemperatureRetrospective StudiesOrgan Preservation SolutionsCardioplegic SolutionsDeep Brain StimulationShiveringOxygenatorsMyxedema