Venous ThrombosisPortal VeinThrombosisHypertension, PortalHypertensionVeinsThrombophlebitisArteriesFemoral VeinHypertension, PulmonaryPortal SystemIliac VeinUpper Extremity Deep Vein ThrombosisMesenteric VeinsPhlebographySplenic VeinRenal VeinsAnticoagulantsPulmonary EmbolismSaphenous VeinPulmonary ArteryVaricose VeinsJugular VeinsPopliteal VeinSubclavian VeinIntracranial ThrombosisSinus Thrombosis, IntracranialCoronary ThrombosisPortal PressureBlood PressureVena Cava, InferiorHypertension, RenalTreatment OutcomeRisk FactorsCarotid ArteriesFibrin Fibrinogen Degradation ProductsCarotid Artery ThrombosisRenal ArteryHeparin, Low-Molecular-WeightFemoral ArteryAxillary VeinHepatic ArteryThrombophiliaMesenteric ArteriesHepatic VeinsTime FactorsUltrasonography, Doppler, DuplexBudd-Chiari SyndromeCerebral ArteriesCerebral VeinsHypertension, RenovascularPostthrombotic SyndromePortasystemic Shunt, SurgicalProspective StudiesRetrospective StudiesAntihypertensive AgentsFollow-Up StudiesPulmonary VeinsTomography, X-Ray ComputedSplenic ArteryHeparinEsophageal and Gastric VaricesBasilar ArteryVenous ThromboembolismLegLiver CirculationThrombectomyAngiographyIliac ArteryProtein S DeficiencyFactor VFibrinolytic AgentsThromboembolismUltrasonography, DopplerMesenteric Vascular OcclusionHypertension, MalignantPostoperative ComplicationsWarfarinVena Cava FiltersPregnancy Complications, CardiovascularCoronary Artery BypassVertebral ArteryUltrasonography, Doppler, ColorRadial ArteryPlethysmography, ImpedanceHemorrhageLiver CirrhosisPostphlebitic SyndromeStockings, CompressionMammary ArteriesRecurrenceIntermittent Pneumatic Compression DevicesStentsLigationSplenorenal Shunt, SurgicalCarotid Artery, InternalThrombolytic TherapyVascular PatencyRisk AssessmentCarotid Artery Diseases