Hypoplastic Left Heart SyndromeHeart Defects, CongenitalNorwood ProceduresFetal HeartPalliative CareFontan ProcedureInfant, NewbornCardiac Surgical ProceduresFetal TherapiesHeart Bypass, RightPulmonary ArteryUltrasonography, PrenatalAortic CoarctationHeart Septal Defects, AtrialSyndromeHeartHeart VentriclesAbnormalities, MultipleBlalock-Taussig ProcedureAnastomosis, SurgicalVentricular Function, RightPregnancyEndocardial FibroelastosisPulmonary CirculationHeart SeptumPrenatal DiagnosisEchocardiographyGestational AgeTransposition of Great VesselsAortic Valve StenosisAortic ValveHeart TransplantationCatheterizationAorta, ThoracicPulmonary VeinsCardiac CatheterizationRetrospective StudiesVascular FistulaEchocardiography, Doppler, ColorTreatment OutcomeHeart Septal Defects, VentricularCardiopulmonary BypassCoronary Vessel AnomaliesEchocardiography, DopplerHeart RateHemodynamicsHeart Bypass, LeftFatal OutcomePregnancy OutcomeHeart Septal DefectsPostoperative PeriodPostoperative ComplicationsDown SyndromeTime FactorsAortaCardiovascular Surgical ProceduresFetal DiseasesProspective StudiesFollow-Up StudiesBlood Flow VelocityCyanosisRisk FactorsDuctus Arteriosus, PatentCase-Control Studies