Blood CirculationExtracorporeal CirculationPulmonary CirculationCollateral CirculationEnterohepatic CirculationCoronary CirculationCerebrovascular CirculationPlacental CirculationSplanchnic CirculationBlood Circulation TimeLiver CirculationRegional Blood FlowTime FactorsBlood Flow VelocityVascular ResistanceHemodynamicsBlood PressurePregnancyCross CirculationTreatment OutcomeAssisted CirculationDogsHeart ArrestCardiopulmonary ResuscitationRenal CirculationPulmonary ArteryLiverPlacentaMetabolic Clearance RateMaternal-Fetal ExchangeTissue DistributionInjections, IntravenousVeinsRetrospective StudiesVasodilationVertebrobasilar InsufficiencyLaser-Doppler FlowmetryMicrocirculationVasoconstrictionHalf-LifeLungFetusArteriesCerebral ArteriesFontan ProcedureOxygenCardiac OutputVasodilator AgentsPerfusionFollow-Up StudiesProspective StudiesDisease Models, AnimalPortal SystemSheepRabbitsSwineNitric OxideCerebral AngiographyBronchial ArteriesRats, Sprague-DawleyPolyethylene GlycolsInfant, NewbornRisk FactorsBlood VesselsCoronary VesselsEndothelium, VascularErythrocytesPulsatile FlowHeart RateAnoxiaMice, Inbred C57BLDose-Response Relationship, DrugDrug CarriersCarbon DioxideBasilar ArteryBileBrainRetinal ArteryVertebral ArteryModels, BiologicalBlood VolumeModels, CardiovascularAnalysis of VarianceHypertension, PulmonaryPredictive Value of TestsLiposomesKidneyRats, WistarOxygen ConsumptionRetinal VesselsKineticsBile Acids and SaltsParabiosisTomography, X-Ray ComputedBiological MarkersPoliomyelitisInjections, Intra-ArterialCardiopulmonary BypassChoroidPartial Pressure