Hypertension, PulmonaryPortal VeinBlood PressureHypertensionHypertension, PortalPulmonary ArteryPressurePulmonary CirculationPulmonary Wedge PressurePortal SystemTricuspid Valve InsufficiencyEchocardiography, DopplerHemodynamicsVascular ResistanceVentricular Dysfunction, RightCardiac CatheterizationPortal PressureCardiac OutputHypertension, RenalAntihypertensive AgentsEchocardiographyHeart FailureProspective StudiesBlood Pressure DeterminationLungHydrostatic PressureHypertension, RenovascularHypertension, MalignantBlood Pressure Monitoring, AmbulatoryVenous PressureLiver CirculationIntraocular PressureHeart RateIntracranial PressureArterial PressureHypertension, Pregnancy-InducedTransducers, PressureRats, Inbred SHRReninOcular HypertensionEsophageal and Gastric VaricesTime FactorsKidneyPortasystemic Shunt, SurgicalAtmospheric PressureIntracranial HypertensionSystoleAir PressureRats, Inbred WKYRisk FactorsSplenic VeinVentricular PressureAngiotensin IISodium Chloride, DietaryRats, Sprague-DawleyLiver CirrhosisTreatment OutcomeMesenteric VeinsFollow-Up StudiesDesoxycorticosteroneHepatic VeinsRenin-Angiotensin SystemDiastoleRegional Blood FlowDisease Models, AnimalPrevalencePortographyDogsCentral Venous PressureSympathetic Nervous SystemPregnancy Complications, CardiovascularVasodilator AgentsHypertrophy, Right VentricularAldosteroneCardiovascular DiseasesHepatic ArteryHypertrophy, Left VentricularLiverNorepinephrinePulseSodium, DietarySplanchnic CirculationDiet, Sodium-RestrictedPortacaval Shunt, SurgicalGastrointestinal HemorrhageRetrospective StudiesNitric OxideVasoconstrictionArteriesCross-Sectional StudiesBlood Flow VelocityAngiotensin-Converting Enzyme InhibitorsDiureticsMonocrotalineSodium ChlorideAge FactorsBody WeightVasoconstrictor AgentsRats, WistarChronic Disease