Blood VolumeHypertensionHypertension, PulmonaryBlood PressureHypertension, RenalHypertension, PortalPlasma VolumeHypovolemiaErythrocyte VolumeHypertension, RenovascularAntihypertensive AgentsCerebrovascular CirculationHemodynamicsHypertension, MalignantHematocritMagnetic Resonance ImagingPlasma SubstitutesVascular ResistanceRegional Blood FlowCardiac OutputStroke VolumeHypertension, Pregnancy-InducedTime FactorsReninPulmonary CirculationHeart RateRisk FactorsFluid ShiftsPulmonary ArteryKidneyOcular HypertensionLung Volume MeasurementsBrainBlood Flow VelocityIntracranial HypertensionBlood CirculationHemorrhagePulmonary Diffusing CapacityRats, Inbred SHROxygenProspective StudiesReproducibility of ResultsHemodilutionHemoglobinsContrast MediaBlood Pressure DeterminationDisease Models, AnimalAldosteroneRats, Sprague-DawleyDye Dilution TechniqueSodium ChlorideIsotonic SolutionsDogsOrgan SizeAngiotensin IIRats, Inbred WKYSpectroscopy, Near-InfraredHydroxyethyl Starch DerivativesReference ValuesTreatment OutcomeTomography, X-Ray ComputedMagnetic Resonance AngiographyHypotensionImage Processing, Computer-AssistedShock, HemorrhagicDesoxycorticosteroneMicrocirculationPerfusion ImagingSodium Chloride, DietaryFollow-Up StudiesSodiumLungHypertrophy, Right VentricularPrevalenceBlood Pressure Monitoring, AmbulatorySystoleIndocyanine GreenPregnancy Complications, CardiovascularMonocrotalineBody WeightAnalysis of VarianceOxygen ConsumptionBlood Volume DeterminationRenin-Angiotensin SystemSensitivity and SpecificitySplanchnic CirculationRetrospective StudiesVasodilator AgentsWater-Electrolyte BalanceVascular CapacitanceOxygen RadioisotopesLiver CirculationGadolinium DTPAPressoreceptorsSympathetic Nervous SystemEchocardiographyTomography, Emission-ComputedPregnancyFluid TherapyPlethysmography