Vasoconstrictor AgentsEphedrineHypotensionShock, SepticRitodrineVasopressinsMephentermineAnesthesia, ObstetricalDecerebrate StateBlood PressurePhenylephrineAnesthesia, SpinalArginine VasopressinCritical CareShockNorepinephrineAutonomic Fibers, PostganglionicHemodynamicsEtomidateHeart ArrestCardiopulmonary ResuscitationResuscitationEpinephrineAdrenal InsufficiencyCritical IllnessVasomotor SystemVascular ResistanceFluid TherapyLypressinAngiotensin IIReceptors, VasopressinAcidosisCesarean SectionCardiac OutputVasoconstrictionPressure UlcerCardiotonic AgentsIntracranial PressureSaralasinCatecholaminesHeart RateIntensive Care UnitsProspective StudiesSepsisHydrochloric AcidAnesthetics, IntravenousAdrenergic alpha-AntagonistsRetrospective StudiesAcid-Base EquilibriumRespiration, ArtificialFentanylRats, Inbred StrainsPrazosinInfusions, IntravenousIntensive CareSympathetic Nervous SystemTreatment OutcomeHydrocortisonePropranololAcute Kidney InjuryAdrenergic alpha-AgonistsMidazolamReceptors, AngiotensinRegional Blood FlowDose-Response Relationship, DrugHospital MortalityHypertensionMonitoring, PhysiologicRats, WistarCarbon DioxideDogsPerfusionPostoperative ComplicationsOxygenReninDopamineDouble-Blind MethodInjections, IntravenousSeverity of Illness IndexPregnancyKidneyTime FactorsAntihypertensive AgentsDrug Therapy, CombinationInfant, NewbornSwineNitric OxideAnalysis of VarianceCohort StudiesElectric StimulationRisk FactorsRats, Sprague-Dawley