Hypothermia, InducedPerfusionCirculatory Arrest, Deep Hypothermia InducedHypothermiaHeart Arrest, InducedRewarmingPerfusion ImagingCardiopulmonary BypassBody TemperatureMyocardial Perfusion ImagingOrgan PreservationBody Temperature RegulationOrgan Preservation SolutionsCerebrovascular CirculationTissue PreservationTomography, Emission-Computed, Single-PhotonCold TemperatureCoronary CirculationTime FactorsCardioplegic SolutionsChemotherapy, Cancer, Regional PerfusionTissue and Organ ProcurementBrainOrgan TransplantationRegional Blood FlowRaffinoseOxygenatorsHeartExtracorporeal CirculationDogsSwineHemodynamicsOxygenShiveringRats, Sprague-DawleyAortic Aneurysm, ThoracicMyxedemaOxygen ConsumptionTechnetium Tc 99m SestamibiLaser-Doppler FlowmetryMicrocirculationBlood Gas AnalysisOrganotechnetium CompoundsIschemiaAortic AneurysmMultiple Organ FailureAneurysm, DissectingRats, WistarHeart ArrestBlood Flow VelocityOrgan SizeContrast Media