Intracranial PressureCerebrovascular CirculationIntracranial HypertensionBlood PressurePerfusionBrain InjuriesMonitoring, PhysiologicMiddle Cerebral ArteryUltrasonography, Doppler, TranscranialPressureBrainBlood Flow VelocityCraniocerebral TraumaGlasgow Outcome ScaleGlasgow Coma ScaleHypoxia, BrainHomeostasisRegional Blood FlowCerebral ArteriesSubarachnoid HemorrhageHypotension, ControlledLaser-Doppler FlowmetryBrain Hemorrhage, TraumaticPerfusion ImagingSaline Solution, HypertonicHemodynamicsCraniotomyBrain EdemaVascular ResistanceDiuretics, OsmoticBrain IschemiaPseudotumor CerebriOxygenOximesBlood Gas AnalysisHypotensionHypothermia, InducedTechnetium Tc 99m ExametazimeSpectroscopy, Near-InfraredMicrodialysisCarbon DioxideDogsCardiopulmonary ResuscitationCerebral InfarctionOrganotechnetium CompoundsTomography, Emission-Computed, Single-PhotonCirculatory Arrest, Deep Hypothermia InducedSwinePhenylephrineOxygen ConsumptionPartial PressureDisease Models, AnimalTime FactorsHydrostatic PressureIsofluraneProspective StudiesCoronary CirculationIntraocular PressureCerebral AngiographyCerebral PalsyMyocardial Perfusion ImagingBlood VolumeTreatment OutcomeMagnetic Resonance ImagingCerebrovascular DisordersAcetazolamideHypertensionCerebrumInfarction, Middle Cerebral ArteryHeart RateArterial PressureVasoconstrictionRenal CirculationIofetamineRats, Sprague-DawleyVasoconstrictor AgentsHeart Arrest, InducedNeuroprotective AgentsAorta, ThoracicTomography, X-Ray ComputedCardiopulmonary BypassVenous PressureBrain DiseasesMicrocirculationCerebral VeinsCerebrospinal Fluid PressureMagnetic Resonance AngiographyTomography, Emission-ComputedCerebral HemorrhageBlood Pressure DeterminationCentral Venous PressureExtracorporeal CirculationAxillary ArteryConstrictionVasodilationAortic Aneurysm, ThoracicMalaria, CerebralKidneyVasodilator AgentsMonitoring, Intraoperative