Venous ThrombosisThrombosisPortal VeinVeinsThrombophlebitisFemoral VeinIliac VeinUpper Extremity Deep Vein ThrombosisPhlebographyMesenteric VeinsAnticoagulantsRenal VeinsPulmonary EmbolismSplenic VeinSaphenous VeinPopliteal VeinVaricose VeinsSubclavian VeinJugular VeinsSinus Thrombosis, IntracranialIntracranial ThrombosisCoronary ThrombosisFibrin Fibrinogen Degradation ProductsVena Cava, InferiorHeparin, Low-Molecular-WeightAxillary VeinThrombophiliaPostthrombotic SyndromeCerebral VeinsCarotid Artery ThrombosisBudd-Chiari SyndromeUltrasonography, Doppler, DuplexVenous ThromboembolismPulmonary VeinsHeparinFactor VProtein S DeficiencyLegVena Cava FiltersThrombectomyTreatment OutcomeFibrinolytic AgentsThromboembolismWarfarinMesenteric Vascular OcclusionHepatic VeinsPostphlebitic SyndromeStockings, CompressionPlethysmography, ImpedanceIntermittent Pneumatic Compression DevicesRisk FactorsHypertension, PortalUmbilical VeinsRetrospective StudiesHemorrhageActivated Protein C ResistanceBandagesThrombolytic TherapyTomography, X-Ray ComputedVenous InsufficiencyProthrombinSagittal Sinus ThrombosisProspective StudiesTime FactorsPortasystemic Shunt, SurgicalFollow-Up StudiesLower ExtremityUltrasonography, DopplerPostoperative ComplicationsRecurrenceIntracranial Embolism and ThrombosisUltrasonography, Doppler, ColorCatheterization, Central VenousBlood CoagulationAntithrombin III DeficiencyEnoxaparinProtein C DeficiencyFibrinogenAntiphospholipid SyndromeCatheterization, PeripheralSplenorenal Shunt, SurgicalSplenectomyVascular PatencyHemostasisRetinal Vein OcclusionEsophageal and Gastric VaricesPregnancy Complications, CardiovascularUltrasonographyAngiographyLiver TransplantationBrachiocephalic VeinsIncidencePlatelet Aggregation InhibitorsStentsAcute DiseaseFibrinRisk AssessmentVascular Surgical ProceduresFibrinolysisCavernous Sinus Thrombosis