AscitesVenous ThrombosisPortal VeinThrombosisHypertension, PortalHypertensionVeinsThrombophlebitisPortal SystemFemoral VeinHypertension, PulmonaryIliac VeinUpper Extremity Deep Vein ThrombosisMesenteric VeinsPhlebographySplenic VeinChylous AscitesRenal VeinsAnticoagulantsPulmonary EmbolismVaricose VeinsJugular VeinsSaphenous VeinPopliteal VeinSubclavian VeinSinus Thrombosis, IntracranialIntracranial ThrombosisPortal PressureCoronary ThrombosisCarcinoma, Ehrlich TumorVena Cava, InferiorHypertension, RenalFibrin Fibrinogen Degradation ProductsHeparin, Low-Molecular-WeightBudd-Chiari SyndromeBlood PressureHepatic VeinsAxillary VeinRisk FactorsPortasystemic Shunt, SurgicalThrombophiliaTreatment OutcomePostthrombotic SyndromeCerebral VeinsEsophageal and Gastric VaricesCarotid Artery ThrombosisLiver CirrhosisUltrasonography, Doppler, DuplexHypertension, RenovascularAntihypertensive AgentsPulmonary VeinsVenous ThromboembolismTime FactorsHeparinRetrospective StudiesLiver CirculationProspective StudiesFollow-Up StudiesProtein S DeficiencyFactor VLegThromboembolismThrombectomyHypertension, MalignantTomography, X-Ray ComputedVena Cava FiltersFibrinolytic AgentsWarfarinMesenteric Vascular OcclusionPregnancy Complications, CardiovascularPlethysmography, ImpedancePostphlebitic SyndromeStockings, CompressionPortacaval Shunt, SurgicalPostoperative ComplicationsHemorrhageSplenorenal Shunt, SurgicalIntermittent Pneumatic Compression DevicesLiver TransplantationSplenectomyGastrointestinal HemorrhageUltrasonography, DopplerUmbilical VeinsPeritoneovenous ShuntHepatic ArteryRecurrenceUltrasonography, Doppler, ColorActivated Protein C ResistanceThrombolytic TherapyIncidenceBandagesVenous InsufficiencyProthrombinSagittal Sinus ThrombosisPortasystemic Shunt, Transjugular IntrahepaticAngiographyHypersplenismRisk AssessmentLower ExtremityLigation