SplenomegalyVenous PressurePortal VeinHypertension, PortalHypertensionHypertension, 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 VeinsPortal PressureConstriction, PathologicJugular VeinsPhlebographyHypertension, RenalSplenectomyBlood PressureLigationSaphenous VeinPulmonary EdemaHepatomegalyAntihypertensive AgentsHypertension, RenovascularHemodynamicsChronic DiseaseRenal DialysisLegHypertension, MalignantHypersplenismVascular PatencyPrimary MyelofibrosisTreatment OutcomeVascular Surgical ProceduresMicrocirculationSplenic VeinSpleenEsophageal and Gastric VaricesLiver CirculationSplenic NeoplasmsHypertension, Pregnancy-InducedSplenic DiseasesLiver CirrhosisRisk FactorsPortasystemic Shunt, SurgicalLeukocytesOcular HypertensionPulmonary ArteryLiverLymphatic DiseasesKidneyDisease Models, AnimalGastrointestinal HemorrhageRats, Inbred SHRTime FactorsReninBlood Pressure DeterminationMesenteric VeinsIntracranial HypertensionOrgan SizePortographyRetrospective StudiesHepatic VeinsMurine Acquired Immunodeficiency SyndromePrevalenceFollow-Up StudiesRats, Inbred WKYVascular ResistanceHepatic ArteryDesoxycorticosteroneLiver DiseasesSplenic ArteryPortacaval Shunt, SurgicalThrombocytopeniaHypertrophy, Right VentricularProspective StudiesSodium Chloride, DietaryBlood Pressure Monitoring, AmbulatoryMonocrotalinePregnancy Complications, CardiovascularAngiotensin IIAscitesMice, Inbred C57BLRenin-Angiotensin SystemMyeloproliferative DisordersAnemiaRats, Sprague-DawleyBone Marrow