ImpatiensBlood PressureBaroreflexHypertensionPressureHeart RateAntihypertensive AgentsCardiac OutputBlood Pressure DeterminationBlood Pressure Monitoring, AmbulatoryTime FactorsPressoreceptorsSympathetic Nervous SystemPhenylephrineCarotid SinusHydrostatic PressureSystoleHemodynamicsAutonomic Nervous SystemBlood Pressure MonitorsReflexCardiovascular SystemVagus NervePulseHypotensionArterial PressureRats, Inbred SHRVascular ResistanceNitroprussideReninDiastoleArteriesKidneyCardiovascular Physiological PhenomenaValsalva ManeuverBradycardiaCentral Venous PressureIntracranial PressureVasoconstrictor AgentsSolitary NucleusSphygmomanometersAngiotensin IIIntraocular PressureHeartPostureHypotension, OrthostaticTransducers, PressureSupine PositionRats, Sprague-DawleyDenervationCircadian RhythmRats, Inbred WKYLower Body Negative PressureNorepinephrineCarotid ArteriesConsciousnessSodium Chloride, DietaryTrimethaphanDogsHypertension, RenalRegional Blood FlowTelemetryDiet, Sodium-RestrictedRenin-Angiotensin SystemVenous PressureGanglionic BlockersVasodilator AgentsCardiovascular DiseasesTilt-Table TestAtmospheric PressureReference ValuesElectrocardiographyAir PressureSodium, DietaryProspective StudiesExerciseAngiotensin-Converting Enzyme InhibitorsBody WeightVasomotor SystemAortaRespirationRisk FactorsAnalysis of VarianceBody Mass IndexAutonomic Nervous System DiseasesPhotoplethysmographyModels, CardiovascularDizzinessVentricular PressureFollow-Up StudiesDouble-Blind MethodRegression AnalysisMedulla OblongataHypertension, RenovascularLosartanAgingHead-Down TiltCaptoprilAldosteroneDose-Response Relationship, Drug