Venous ThrombosisPortal VeinThrombosisHypertension, PortalHypertensionVeinsThrombophlebitisFemoral VeinPortal SystemHypertension, PulmonaryIliac VeinUpper Extremity Deep Vein ThrombosisPhlebographyMesenteric VeinsSplenic VeinRenal VeinsAnticoagulantsPulmonary EmbolismVaricose VeinsJugular VeinsSaphenous VeinPopliteal VeinSubclavian VeinSinus Thrombosis, IntracranialIntracranial ThrombosisCoronary ThrombosisPortal PressureVena Cava, InferiorHypertension, RenalFibrin Fibrinogen Degradation ProductsHeparin, Low-Molecular-WeightBlood PressureAxillary VeinThrombophiliaRisk FactorsBudd-Chiari SyndromeHepatic VeinsTreatment OutcomePostthrombotic SyndromeCerebral VeinsPortasystemic Shunt, SurgicalCarotid Artery ThrombosisUltrasonography, Doppler, DuplexHypertension, RenovascularAntihypertensive AgentsPulmonary VeinsEsophageal and Gastric VaricesVenous ThromboembolismHeparinTime FactorsLiver CirculationRetrospective StudiesProtein S DeficiencyFactor VProspective StudiesLegFollow-Up StudiesThromboembolismThrombectomyHypertension, MalignantVena Cava FiltersFibrinolytic AgentsWarfarinTomography, X-Ray ComputedMesenteric Vascular OcclusionPregnancy Complications, CardiovascularPlethysmography, ImpedanceLiver CirrhosisPostphlebitic SyndromeStockings, CompressionIntermittent Pneumatic Compression DevicesHemorrhageSplenorenal Shunt, SurgicalPostoperative ComplicationsUltrasonography, DopplerSplenectomyPortacaval Shunt, SurgicalUmbilical VeinsHepatic ArteryLiver TransplantationActivated Protein C ResistanceThrombolytic TherapyGastrointestinal HemorrhageRecurrenceUltrasonography, Doppler, ColorBandagesVenous InsufficiencyProthrombinIncidenceSagittal Sinus ThrombosisAngiographyHypersplenismRisk AssessmentLower ExtremityIntracranial Embolism and ThrombosisLigationHypertension, Pregnancy-InducedCatheterization, Central VenousBlood CoagulationPulmonary Artery