Vena Cava, InferiorVena Cava, SuperiorSuperior Vena Cava SyndromeVena Cava FiltersVenae CavaeHeartAzygos VeinHeart RatePhlebographyRenal VeinsHeart AtriaVenous ThrombosisPulmonary EmbolismBudd-Chiari SyndromeVascular NeoplasmsHepatic VeinsBrachiocephalic VeinsHeart Defects, CongenitalHeart FailureIliac VeinVascular MalformationsHeart DiseasesDevice RemovalTomography, X-Ray ComputedHeart TransplantationFetal HeartTreatment OutcomeCatheterization, Central VenousSuperior ColliculiJugular VeinsLeiomyosarcomaPortal VeinHeart ValvesCoronary SinusPulmonary VeinsFemoral VeinDogsTime FactorsHeart NeoplasmsVeinsConstriction, PathologicMesenteric Artery, SuperiorVenous PressureHeart BlockEchocardiographyHeart Bypass, RightHeterotaxy SyndromeHemodynamicsScimitar SyndromeAnastomosis, SurgicalProsthesis ImplantationFollow-Up StudiesSubclavian VeinSitus InversusThrombosisCatheter AblationHeart Septal Defects, AtrialVascular DiseasesRetrospective StudiesConstrictionMyocardiumCatheterizationMyocardial ContractionIncidental FindingsAnticoagulantsHeart Septal DefectsCardiovascular AbnormalitiesPulmonary ArteryPolytetrafluoroethyleneVascular Surgical ProceduresHeart SeptumProspective StudiesAtrial FlutterMesenteric VeinsEquipment FailureBlood Vessel Prosthesis ImplantationHeart Arrest, InducedThrombophlebitisRetroperitoneal NeoplasmsCardiac Pacing, ArtificialPacemaker, ArtificialTricuspid ValveThrombectomyForeign-Body MigrationCardiac Surgical ProceduresStentsMagnetic Resonance ImagingCardiac CatheterizationMediastinal DiseasesEchocardiography, TransesophagealHeart Function TestsCollateral CirculationCyanosisUltrasonography, PrenatalBlood Flow VelocityMediastinal NeoplasmsPortacaval Shunt, SurgicalHeart InjuriesAtrial Function, RightFatal Outcome