IsomerismHeterotaxy SyndromeHeart Defects, CongenitalHeart AtriaSitus InversusHeart Septal DefectsAbnormalities, MultipleVenae CavaeDextrocardiaLevocardiaHeart Bypass, RightPulmonary VeinsErythrocruorinsPulmonary Veno-Occlusive DiseaseGrowth Differentiation Factor 1Fetal HeartCyanosisAbortion, EugenicNodal ProteinAtrioventricular NodeFetal DiseasesVena Cava, InferiorFontan ProcedureAzygos VeinSinoatrial NodeTachycardia, SupraventricularHeart BlockUltrasonography, PrenatalMagnetic Resonance SpectroscopyHeart ValvesAtrial AppendageProlineHeart Septal Defects, AtrialPrenatal DiagnosisInfant, NewbornSyndromeStereoisomerismBody PatterningPregnancyModels, MolecularEchocardiographyMolecular StructureGestational AgeSupine PositionAsiaProne PositionProtein ConformationSpleenRetrospective StudiesMolecular Sequence DataStomachTreatment OutcomeTime FactorsFollow-Up StudiesAmino Acid SequenceBase SequencePostureBinding SitesMutationPatient PositioningStructure-Activity RelationshipMutagenesis, Site-DirectedAmino Acid SubstitutionEscherichia coliPhylogenySubstrate SpecificityKineticsSequence AlignmentCloning, MolecularSequence Homology, Amino AcidProtein BindingNucleic Acid ConformationDNA