Portal PressureHypertension, PortalPortal VeinPortal SystemCatheters, IndwellingVenous PressureLiver CirculationPressureCathetersBlood PressurePortasystemic Shunt, SurgicalHepatic VeinsLiver Cirrhosis, ExperimentalLiver CirrhosisPortasystemic Shunt, Transjugular IntrahepaticEsophageal and Gastric VaricesSplanchnic CirculationPortacaval Shunt, SurgicalSplenorenal Shunt, SurgicalGastrointestinal HemorrhageBlood Pressure DeterminationCatheterizationLiver Cirrhosis, AlcoholicPortographyLiverHydrostatic PressureLigationMesenteric VeinsCatheterization, Central VenousHemodynamicsHepatic ArteryAscitesCarbon TetrachlorideSplenic VeinSplenic ArteryAzygos VeinRegional Blood FlowCardiac OutputLiver Diseases, ParasiticVascular ResistanceCentral Venous CathetersSchistosomiasisCommon Bile DuctCatheterization, PeripheralSplenectomyPerfusionSplenic DiseasesCardiac CathetersTransducers, PressureTime FactorsUrinary CatheterizationSulfur HexafluorideHyperbilirubinemiaHeart RateDogsRats, Sprague-DawleyHypertensionPropranololIntracranial PressureLiver Function TestsAntihypertensive AgentsTreatment OutcomeIntraocular PressureLiver TransplantationUrinary CathetersEquipment FailureBlood Pressure Monitoring, AmbulatoryExtracorporeal CirculationBlood Flow VelocityEquipment DesignAir PressureHepatectomyIndocyanine GreenDimethylnitrosamineLiver DiseasesAtmospheric PressureRats, WistarEndothelin-1Catheter-Related InfectionsAdrenergic beta-AntagonistsVentricular PressureArterial PressureRetrospective StudiesCentral Venous PressureBlood Coagulation DisordersProthrombin TimeProspective StudiesNitric OxidePulmonary Wedge PressureCardiac CatheterizationJugular VeinsCatheterization, Swan-GanzRats, Inbred StrainsForeign-Body Migration