ThrombosisVenous ThrombosisCoronary ThrombosisSinus Thrombosis, IntracranialIntracranial ThrombosisCarotid Artery ThrombosisVeinsCerebral VeinsAnticoagulantsFemoral VeinPortal VeinSagittal Sinus ThrombosisPhlebographyIntracranial Embolism and ThrombosisIliac VeinThrombophiliaJugular VeinsUpper Extremity Deep Vein ThrombosisVena Cava, InferiorBlood Specimen CollectionHeparinMesenteric VeinsBlood CoagulationTime FactorsFactor VFibrinolytic AgentsHemostasisHeparin, Low-Molecular-WeightCavernous Sinus ThrombosisPopliteal VeinAntiphospholipid SyndromeThromboembolismPlatelet Aggregation InhibitorsTreatment OutcomePlatelet AggregationLateral Sinus ThrombosisRisk FactorsBleeding TimeThrombectomyBlood PlateletsRegional Blood FlowBlood Gas AnalysisCranial SinusesFibrin Fibrinogen Degradation ProductsStentsProtein S DeficiencySuperior Sagittal SinusPlatelet ActivationRenal VeinsHemorrhageDogsSubclavian VeinProspective StudiesDrug-Eluting StentsProthrombinFibrinolysisOxygenBlood Flow VelocityFollow-Up StudiesCatheterization, Central VenousVenous ThromboembolismArteriesBlood Coagulation TestsAntibodies, AntiphospholipidProtein C DeficiencyCarbon DioxideRetrospective StudiesActivated Protein C ResistanceFibrinogenLupus Coagulation InhibitorThromboplastinUltrasonography, DopplerThrombolytic TherapyWarfarinLiver CirculationSplenic VeinPartial PressurePregnancyHepatic ArteryPhlebotomyUltrasonography, Doppler, DuplexBudd-Chiari SyndromeAntithrombin III DeficiencyAxillary VeinHepatic VeinsMesenteric Vascular OcclusionProtein CPostthrombotic SyndromeAspirinGraft Occlusion, VascularTomography, X-Ray ComputedFibrinVena Cava FiltersOxygen ConsumptionAcute DiseasePostphlebitic SyndromeUltrasonography, Doppler, ColorProthrombin TimeAntithrombinsCase-Control Studies