Hypertension, PortalSplenomegalyPortal VeinPortal PressureEsophageal and Gastric VaricesPortal SystemHypertensionSplenic VeinPortasystemic Shunt, SurgicalLiver CirrhosisGastrointestinal HemorrhageHypertension, PulmonaryHypersplenismSplenectomyLiver CirculationAscitesVenous PressurePortasystemic Shunt, Transjugular IntrahepaticSplenic ArterySplenorenal Shunt, SurgicalPortographyPortacaval Shunt, SurgicalHepatic VeinsSplenic DiseasesSplanchnic CirculationLigationMesenteric VeinsHepatomegalyBlood PressureHypertension, RenalLiverLiver Diseases, ParasiticSclerotherapyLiver DiseasesLiver Cirrhosis, ExperimentalHepatic EncephalopathyAntihypertensive AgentsHematemesisPrimary MyelofibrosisHypertension, RenovascularSpleenHepatopulmonary SyndromeLiver Cirrhosis, AlcoholicSchistosomiasis mansoniBudd-Chiari SyndromeHypertension, MalignantVaricose VeinsLiver TransplantationHemodynamicsHepatic ArteryTreatment OutcomeMelenaRetrospective StudiesLiver Function TestsVenous ThrombosisRenal VeinsCollateral CirculationRisk FactorsFollow-Up StudiesLypressinStomach DiseasesTime FactorsSclerosing SolutionsVena Cava, InferiorSplenic NeoplasmsElasticity Imaging TechniquesDisease Models, AnimalHemostasis, EndoscopicCarbon TetrachlorideArteriovenous FistulaVascular ResistanceHydrothoraxRats, Sprague-DawleyHypertension, Pregnancy-InducedHepatorenal SyndromeChronic DiseaseEnbucrilateBlood Pressure DeterminationOrgan SizeFelty SyndromeProspective StudiesTomography, X-Ray ComputedPlatelet CountColitis, IschemicSeverity of Illness IndexGastric Antral Vascular EctasiaNostrumsNitric OxideHemorrhagePostoperative ComplicationsKidneyLiver Cirrhosis, BiliaryCholestasisPancytopeniaVasodilator AgentsAzygos VeinSchistosomiasisPhlebographyVasoconstrictor AgentsOcular Hypertension