Vena Cava, InferiorVena Cava, SuperiorSuperior Vena Cava SyndromeVena Cava FiltersVenae CavaeAzygos VeinPhlebographyRenal VeinsVenous ThrombosisPulmonary EmbolismBudd-Chiari SyndromeVascular NeoplasmsHepatic VeinsBrachiocephalic VeinsIliac VeinVascular MalformationsHeart AtriaDevice RemovalTomography, X-Ray ComputedCatheterization, Central VenousSuperior ColliculiLeiomyosarcomaJugular VeinsPortal VeinTreatment OutcomeCoronary SinusFemoral VeinPulmonary VeinsVeinsConstriction, PathologicMesenteric Artery, SuperiorVenous PressureScimitar SyndromeHeterotaxy SyndromeHeart Bypass, RightAnastomosis, SurgicalSubclavian VeinProsthesis ImplantationSitus InversusThrombosisHeart NeoplasmsVascular DiseasesCatheter AblationDogsIncidental FindingsHeart Defects, CongenitalCatheterizationConstrictionPolytetrafluoroethyleneAtrial FlutterAnticoagulantsBlood Vessel Prosthesis ImplantationVascular Surgical ProceduresMesenteric VeinsThrombophlebitisRetroperitoneal NeoplasmsEquipment FailureHeart Septal Defects, AtrialThrombectomyTime FactorsForeign-Body MigrationCardiovascular AbnormalitiesMediastinal DiseasesStentsPortacaval Shunt, SurgicalMediastinal NeoplasmsRetrospective StudiesEchocardiographyPulmonary ArteryCollateral CirculationFollow-Up StudiesLeiomyomatosisEchocardiography, TransesophagealTricuspid ValveMagnetic Resonance ImagingHepatectomyVascular GraftingMultiple TraumaAngiographyBlood Vessel ProsthesisSuperior Cervical GanglionArteriovenous FistulaAtrial Function, RightUltrasonography, PrenatalAbnormalities, MultipleFatal OutcomeFontan ProcedureLiver TransplantationChylothoraxPacemaker, ArtificialBlood Flow VelocityLiver CirculationCyanosisCatheters, IndwellingReplantationCardiac CatheterizationRadiography, InterventionalLigationCardiac Surgical ProceduresPortal System