PressureBlood PressureHydrostatic PressureVentricular Function, LeftBlood Pressure DeterminationVentricular Dysfunction, LeftHypertensionTransducers, PressureIntracranial PressureIntraocular PressureHypertrophy, Left VentricularBlood Pressure Monitoring, AmbulatoryVentricular PressureAtmospheric PressureAir PressureVenous PressureHemodynamicsHeart RateArterial PressureSystoleDiastoleHeart VentriclesAtrial Function, LeftPulmonary Wedge PressureCentral Venous PressureAntihypertensive AgentsDogsEchocardiographyTime FactorsVascular ResistanceHeartOsmotic PressureCardiac OutputMyocardial ContractionPulseBlood Flow VelocityManometryTreatment OutcomeMyocardiumProspective StudiesElectrocardiographyRegional Blood FlowHeart FailureHeart AtriaPositive-Pressure RespirationCerebrospinal Fluid PressureCoronary CirculationFollow-Up StudiesContinuous Positive Airway PressureAnalysis of VarianceSympathetic Nervous SystemPortal PressureStroke VolumeVentricular RemodelingHypotensionRats, Inbred SHRCardiac CatheterizationPressoreceptorsReninRats, Sprague-DawleyModels, CardiovascularPulmonary ArteryDisease Models, AnimalOxygenKidneyReference ValuesComplianceVentricular FunctionPostureArteriesAortaLower Body Negative PressureRespirationBaroreflexCardiac VolumeMyocardial InfarctionNorepinephrinePerfusionMonitoring, PhysiologicRats, WistarPredictive Value of TestsCoronary VesselsReproducibility of ResultsAngiotensin-Converting Enzyme InhibitorsReflexRespiratory MechanicsCardiovascular SystemEquipment DesignHydrocephalus, Normal PressureCarbon DioxideBlood VolumeRegression AnalysisPulsatile FlowCircadian RhythmRats, Inbred WKYOrgan SizeElasticityAngiotensin IIDose-Response Relationship, DrugBody Weight