Balloon ValvuloplastyAortic Valve StenosisCatheterizationAortic Valve ProlapseAortic ValveHeart Valve Prosthesis ImplantationCardiac CatheterizationMitral Valve StenosisTreatment OutcomeFetal TherapiesFollow-Up StudiesHypoplastic Left Heart SyndromePulmonary Valve StenosisEndocardial FibroelastosisAortic Valve InsufficiencyBalloon OcclusionHeart Valve ProsthesisAngioplasty, BalloonHemodynamicsChemoembolization, TherapeuticMitral ValveSeptal Occluder DeviceHeart Septal Defects, AtrialPulmonary ValveRheumatic Heart DiseaseEchocardiography, TransesophagealRetrospective StudiesEmbolization, TherapeuticInfant, NewbornBioprosthesisProsthesis DesignPregnancy OutcomeEchocardiographyAngioplasty, Balloon, CoronaryDuctus Arteriosus, PatentProstheses and ImplantsIntra-Aortic Balloon PumpingAtrial SeptumMitral Valve InsufficiencyEthiodized OilGastric BalloonEchocardiography, Doppler, ColorIodized OilPostoperative ComplicationsTricuspid Valve StenosisTime FactorsPregnancyHeart Valve DiseasesAngiographyMitral Valve AnnuloplastyHeart Septal Defects, VentricularPulmonary AtresiaCardiac CathetersRadiography, InterventionalEchocardiography, DopplerVenous InsufficiencyRecurrenceCardiac Surgical ProceduresPulmonary Valve InsufficiencyProsthesis ImplantationCatheterization, PeripheralHeart Defects, CongenitalCarcinoma, HepatocellularSeverity of Illness IndexPregnancy Complications, CardiovascularLiver NeoplasmsFemoral VeinFluoroscopyProspective StudiesStentsReoperationFeasibility StudiesMultidetector Computed Tomography