Vena Cava, SuperiorSuperior Vena Cava SyndromeVena Cava, InferiorAzygos VeinVena Cava FiltersBrachiocephalic VeinsVenae CavaePhlebographyVascular MalformationsCoronary SinusCatheterization, Central VenousHeart AtriaPulmonary VeinsJugular VeinsHeart Bypass, RightTomography, X-Ray ComputedDevice RemovalSubclavian VeinMediastinal NeoplasmsVascular NeoplasmsMediastinal DiseasesHepatic VeinsPulmonary EmbolismCardiovascular AbnormalitiesIncidental FindingsVenous ThrombosisHeart Defects, CongenitalCatheter AblationPacemaker, ArtificialInferior ColliculiChylothoraxRenal VeinsConstriction, PathologicTreatment OutcomeBudd-Chiari SyndromeEchocardiography, TransesophagealMediastinal CystCentral Venous CathetersHeart Septal Defects, AtrialFemoral VeinEquipment FailureCatheterizationCyanosisPeritoneovenous ShuntHeart NeoplasmsVascular DiseasesCollateral CirculationStentsProsthesis ImplantationHydrothoraxCatheters, IndwellingCardiac Surgical ProceduresElectrodes, ImplantedEchocardiographyThymomaIliac VeinVenous PressureMediastinitisScimitar SyndromeVeinsAtrial SeptumPericardiumHeart Septal DefectsPulmonary ArteryFontan ProcedureCoronary Vessel AnomaliesAnastomosis, SurgicalSinoatrial NodeAbnormalities, MultipleAtrial FibrillationEmpyema, TuberculousCardiac CatheterizationCatheterization, Swan-GanzCardiac Pacing, ArtificialMiddle Lobe SyndromeElectrophysiologic Techniques, CardiacBlood Vessel Prosthesis ImplantationThymus NeoplasmsCarcinoma, BronchogenicThrombosisAtrial FlutterDilatation, PathologicThoracic NeoplasmsTricuspid ValveVascular Surgical ProceduresArrhythmia, SinusPolytetrafluoroethyleneForeign-Body MigrationThoracic Surgical ProceduresDogsMagnetic Resonance ImagingFistulaBehcet SyndromeUpper Extremity Deep Vein ThrombosisConstrictionElectrocardiographySick Sinus SyndromeUltrasonography, PrenatalMyxomaHeart Conduction System