Intracranial Embolism and ThrombosisIntracranial EmbolismPulmonary EmbolismThrombosisVenous ThrombosisEmbolismEmbolism, FatCarotid StenosisAortic Valve StenosisCoronary StenosisSpinal StenosisCoronary ThrombosisEmbolism, ParadoxicalTracheal StenosisSinus Thrombosis, IntracranialConstriction, PathologicMitral Valve StenosisPyloric StenosisCarotid Artery ThrombosisIntracranial ThrombosisAnticoagulantsPulmonary Valve StenosisEmbolism, Amniotic FluidPhlebographyTreatment OutcomeStentsAngiographyTomography, X-Ray ComputedUltrasonography, Doppler, DuplexEmbolism, CholesterolThromboembolismFollow-Up StudiesFemoral VeinRisk FactorsProspective StudiesIliac VeinRetrospective StudiesCoronary AngiographyRenal Artery ObstructionVena Cava FiltersEmbolectomyHeparinSagittal Sinus ThrombosisRecurrenceArterial Occlusive DiseasesThrombophiliaAngioplasty, BalloonAortic Stenosis, SubvalvularCarotid Artery, InternalTime FactorsMagnetic Resonance AngiographyFibrinolytic AgentsVena Cava, InferiorAortic Stenosis, SupravalvularVentilation-Perfusion RatioThrombectomyUpper Extremity Deep Vein ThrombosisHeparin, Low-Molecular-WeightCatheterizationGraft Occlusion, VascularEndarterectomy, CarotidAortic ValveSeverity of Illness IndexVenous ThromboembolismWarfarinPredictive Value of TestsHemorrhageEchocardiography, TransesophagealEchocardiographyAcute DiseaseLaryngostenosisPlatelet Aggregation InhibitorsCardiac CatheterizationPortal VeinPopliteal VeinBlood Flow VelocityAngiography, Digital SubtractionSensitivity and SpecificityVascular PatencyCerebral VeinsFactor VCerebral AngiographyTomography, Spiral ComputedBlood CoagulationTricuspid Valve StenosisArteriovenous Shunt, SurgicalHeart Valve Prosthesis ImplantationHeart Valve ProsthesisThrombolytic TherapyJugular VeinsRisk AssessmentDiscrete Subaortic StenosisCoronary DiseaseStrokeSubclavian VeinAntiphospholipid SyndromeAngioplastyCoronary VesselsPostoperative ComplicationsUltrasonography, Doppler, Color