Venous PressurePortal VeinHypertensionHypertension, PortalHypertension, PulmonaryVaricose UlcerVenous InsufficiencyAxillary VeinFemoral VeinArteriovenous Shunt, SurgicalCerebral VeinsPortal SystemKlippel-Trenaunay-Weber SyndromeArteriovenous FistulaVaricose VeinsCentral Nervous System Vascular MalformationsSubclavian VeinUpper Extremity Deep Vein ThrombosisCentral Venous PressureVeinsCranial SinusesBrachiocephalic VeinsBlood PressurePortal PressureConstriction, PathologicJugular VeinsHypertension, RenalPhlebographyLigationPulmonary EdemaSaphenous VeinHemodynamicsAntihypertensive AgentsHypertension, RenovascularRenal DialysisLegHypertension, MalignantChronic DiseaseVascular PatencyMicrocirculationVascular Surgical ProceduresTreatment OutcomeLiver CirculationHypertension, Pregnancy-InducedEsophageal and Gastric VaricesPortasystemic Shunt, SurgicalPulmonary ArteryRisk FactorsOcular HypertensionBlood Pressure DeterminationLeukocytesSplenic VeinVascular ResistanceReninRats, Inbred SHRKidneyLiver CirrhosisIntracranial HypertensionHeart RateMesenteric VeinsBlood Pressure Monitoring, AmbulatoryRats, Inbred WKYHepatic VeinsPortographyTime FactorsSodium Chloride, DietaryRats, Sprague-DawleyAngiotensin IIHepatic ArteryHypertrophy, Right VentricularPrevalenceDesoxycorticosteroneLiverPortacaval Shunt, SurgicalPregnancy Complications, CardiovascularProspective StudiesGastrointestinal HemorrhageMonocrotalineRenin-Angiotensin SystemFollow-Up StudiesSplanchnic CirculationVasodilator AgentsDisease Models, AnimalSystoleAldosteroneRegional Blood FlowRetrospective StudiesPulmonary CirculationAnoxiaNitric OxideDiureticsCardiovascular DiseasesHypertrophy, Left VentricularSodium, DietaryHydrochlorothiazideNorepinephrineVasoconstrictionHyperaldosteronismDiet, Sodium-RestrictedVasoconstrictor Agents