Pulmonary EmbolismVenous ThrombosisThrombosisEmbolismEmbolism, FatVentilation-Perfusion RatioAnticoagulantsVena Cava FiltersEmbolectomyThrombophlebitisFibrin Fibrinogen Degradation ProductsEmbolism, ParadoxicalPhlebographyThromboembolismIntracranial Embolism and ThrombosisVenous ThromboembolismSinus Thrombosis, IntracranialCoronary ThrombosisAngiographyTomography, Spiral ComputedIntracranial EmbolismAcute DiseaseVentricular Dysfunction, RightHeparinTomography, X-Ray ComputedFemoral VeinEmbolism, Amniotic FluidHeparin, Low-Molecular-WeightFibrinolytic AgentsPulmonary ArteryVena Cava, InferiorIntracranial ThrombosisIliac VeinCarotid Artery ThrombosisThrombolytic TherapyPopliteal VeinThrombophiliaRisk FactorsHemorrhageWarfarinTreatment OutcomeThrombectomyRetrospective StudiesProspective StudiesTechnetium Tc 99m Aggregated AlbuminRecurrenceFollow-Up StudiesUpper Extremity Deep Vein ThrombosisEnoxaparinPerfusion ImagingEmbolism, CholesterolPulmonary InfarctionStreptokinasePostoperative ComplicationsTime FactorsPredictive Value of TestsFactor VRisk AssessmentHemoptysisAutopsyEchocardiography, TransesophagealIncidenceEchocardiographySagittal Sinus ThrombosisBlood CoagulationKrypton RadioisotopesBandagesAntifibrinolytic AgentsSensitivity and SpecificityPlethysmography, ImpedanceXenon RadioisotopesStockings, CompressionPregnancy Complications, CardiovascularForamen Ovale, PatentShockHeart DiseasesFatal OutcomeAntiphospholipid SyndromeUltrasonography, Doppler, DuplexTissue Plasminogen ActivatorIntermittent Pneumatic Compression DevicesJugular VeinsSubclavian VeinRadionuclide ImagingTachycardia, SinusDevice RemovalPostthrombotic SyndromePlatelet Aggregation InhibitorsVeinsProthrombinLungCatheterization, Central VenousAxillary VeinPostphlebitic SyndromeRadiography, ThoracicSeverity of Illness IndexChest PainPrognosisLegCerebral Veins