Portal VeinHypertension, PortalPortal SystemVeinsMesenteric VeinsPortal PressureLiver CirculationSaphenous VeinHepatic VeinsVaricose VeinsHepatic ArterySplenic VeinFemoral VeinVenous ThrombosisPortographyJugular VeinsPulmonary VeinsPortasystemic Shunt, SurgicalLiverRenal VeinsIliac VeinEsophageal and Gastric VaricesHepatectomyUmbilical VeinsPortacaval Shunt, SurgicalLiver NeoplasmsLiver CirrhosisLiver TransplantationSplenorenal Shunt, SurgicalLigationVena Cava, InferiorSplanchnic CirculationPopliteal VeinCarcinoma, HepatocellularTomography, X-Ray ComputedSplenic ArteryMuscle, Smooth, VascularBudd-Chiari SyndromeSubclavian VeinVenous PressureGastrointestinal HemorrhageRetinal Vein OcclusionCerebral VeinsEmbolization, TherapeuticPortasystemic Shunt, Transjugular IntrahepaticAzygos VeinAnastomosis, SurgicalRetinal VeinDogsSplenectomyTreatment OutcomePhlebographyThrombosisLiver DiseasesUltrasonography, Doppler, ColorAngiographyBrachiocephalic VeinsTime FactorsLiving DonorsUltrasonography, DopplerNorepinephrineRegional Blood FlowVenae CavaeHypersplenismConstriction, PathologicAxillary VeinLiver Diseases, ParasiticChemoembolization, TherapeuticRabbitsPostoperative ComplicationsBile DuctsRetrospective StudiesBlood Flow VelocityLiver Cirrhosis, ExperimentalLiver RegenerationHepatic EncephalopathyLiver Function TestsAscitesLiver Cirrhosis, AlcoholicMuscle ContractionRats, WistarSplenomegalySclerotherapyVascular Surgical Procedures