Heart Septal DefectsHeart Septal Defects, VentricularCyanosisHeart Septal Defects, AtrialHeart Defects, CongenitalCatheters, IndwellingHeartCathetersTetralogy of FallotSeptal Occluder DeviceCardiac CatheterizationHeart RateCardiac Surgical ProceduresHeart SeptumTransposition of Great VesselsPulmonary ArteryPulmonary Valve StenosisCatheterizationInfant, NewbornHeart AtriaEchocardiography, TransesophagealEisenmenger ComplexHeart DiseasesEchocardiographyBalloon OcclusionAortopulmonary Septal DefectCatheterization, Central VenousAtrial SeptumDuctus Arteriosus, PatentProstheses and ImplantsPulmonary CirculationHeart FailureEchocardiography, Doppler, ColorPhlebotomyPulmonary AtresiaFetal HeartCardiopulmonary BypassHemodynamicsHeart InjuriesTreatment OutcomeHeart ValvesFollow-Up StudiesAnoxiaTricuspid ValveProsthesis ImplantationAbnormalities, MultipleOxygenCentral Venous CathetersHeart VentriclesEndocardial Cushion DefectsRetrospective StudiesHeart BlockHeart AneurysmBloodlettingCardiac CathetersEquipment FailureMyocardiumApneaFluoroscopyCatheterization, PeripheralAortic CoarctationFontan ProcedureSubclavian ArteryUrinary CatheterizationAortic Stenosis, SubvalvularPulmonary Subvalvular StenosisVentricular Septal RuptureHematocritTime FactorsTruncus Arteriosus, PersistentAngiocardiographyProspective StudiesHeart TransplantationUnconsciousnessVentricular Outflow ObstructionPolycythemiaCardiovascular Surgical ProceduresEquipment DesignForeign-Body MigrationDouble Outlet Right VentricleUrinary CathetersPulmonary VeinsPalliative CareEbstein AnomalyMethemoglobinemiaEchocardiography, Three-DimensionalVena Cava, SuperiorHeart Arrest, InducedVentricular SeptumRisk FactorsCardiovascular AbnormalitiesCatheter-Related InfectionsHeart MurmursBlood Gas AnalysisPulmonary ValveCineangiographyTricuspid Valve InsufficiencyElectrocardiographyPartial PressureFeasibility Studies