Vena Cava, InferiorRenal VeinsVena Cava FiltersVena Cava, SuperiorAzygos VeinSuperior Vena Cava SyndromeVenae CavaePhlebographyVenous ThrombosisVeinsIliac VeinVascular NeoplasmsHepatic VeinsBudd-Chiari SyndromePulmonary EmbolismPortal VeinFemoral VeinLeiomyosarcomaTomography, X-Ray ComputedRenal Nutcracker SyndromeVascular MalformationsConstriction, PathologicDevice RemovalPulmonary VeinsFlank PainMesenteric VeinsHeart AtriaAnastomosis, SurgicalJugular VeinsTreatment OutcomeHeterotaxy SyndromeSaphenous VeinVaricose VeinsThrombosisSplenic VeinScimitar SyndromeReplantationVascular Surgical ProceduresRenal ArteryNeoplasms, Vascular TissueArteriovenous FistulaNephrectomyThrombectomyVaricoceleForeign-Body MigrationSitus InversusInferior ColliculiConstrictionVenous PressureVascular DiseasesBrachiocephalic VeinsAtrial FlutterRetroperitoneal NeoplasmsSubclavian VeinDogsHeart NeoplasmsKidneyLeiomyomatosisHeart Bypass, RightBlood Vessel Prosthesis ImplantationAorta, AbdominalPyelonephritis, XanthogranulomatousUltrasonography, Doppler, ColorHematuriaAngiographyCatheterization, Central VenousRetrospective StudiesVascular GraftingLigationKidney NeoplasmsProsthesis ImplantationThrombophlebitisAnticoagulantsAnatomy, RegionalCatheter AblationTime FactorsPolytetrafluoroethyleneHeart Defects, CongenitalUmbilical VeinsHepatectomyFollow-Up StudiesPortacaval Shunt, SurgicalLiver CirculationMagnetic Resonance ImagingStentsPulmonary ArteryLiver TransplantationCatheterizationVascular PatencyUltrasonography, PrenatalFontan ProcedureCadaverCarcinoma, Renal CellMultiple TraumaKlippel-Trenaunay-Weber SyndromeAtrial Function, RightEdemaIncidental FindingsHemodynamicsHeart Septal Defects, Atrial