Portal VeinHypertension, PortalHypertensionVeinsHypertension, PulmonaryPortal SystemSaphenous VeinPortal PressureHypertension, RenalVaricose VeinsBlood PressureFemoral VeinMesenteric VeinsAntihypertensive AgentsHypertension, RenovascularPulmonary VeinsJugular VeinsHepatic VeinsSplenic VeinHypertension, MalignantRenal VeinsLiver CirculationIliac VeinRisk FactorsUmbilical VeinsTreatment OutcomeEsophageal and Gastric VaricesHypertension, Pregnancy-InducedPortasystemic Shunt, SurgicalTime FactorsPopliteal VeinFollow-Up StudiesPulmonary ArteryProspective StudiesPrevalenceOcular HypertensionSubclavian VeinHemodynamicsLiver CirrhosisSeverity of Illness IndexVenous PressureCerebral VeinsPortographyRetrospective StudiesVenous ThrombosisReninRats, Inbred SHRHepatic ArteryBlood Pressure DeterminationIntracranial HypertensionKidneyAzygos VeinLiverVascular ResistanceCross-Sectional StudiesRats, Inbred WKYRetinal VeinChronic DiseasePortacaval Shunt, SurgicalDesoxycorticosteroneDisease Models, AnimalBrachiocephalic VeinsGastrointestinal HemorrhagePregnancy Complications, CardiovascularLigationQuestionnairesDepressionHypertrophy, Right VentricularRats, Sprague-DawleyAge FactorsAngiotensin IICohort StudiesSplanchnic CirculationBlood Pressure Monitoring, AmbulatorySodium Chloride, DietaryAxillary VeinMonocrotalineSymptom AssessmentRetinal Vein OcclusionTomography, X-Ray ComputedVena Cava, InferiorVasodilator AgentsEndothelium, VascularRenin-Angiotensin SystemHeart RatePhlebographyMuscle, Smooth, VascularSex FactorsAldosteroneCase-Control StudiesRegional Blood FlowNorepinephrineNitric OxideRisk AssessmentIncidenceHypersplenismPseudotumor CerebriCardiovascular DiseasesSplenic ArterySplenorenal Shunt, Surgical