IsomerismInformaticsStereoisomerismMagnetic Resonance SpectroscopyMolecular StructureHeterotaxy 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 VeinTachycardia, SupraventricularSinoatrial NodeHeart BlockUltrasonography, PrenatalHeart ValvesAtrial AppendageHeart Septal Defects, AtrialProlinePrenatal DiagnosisInfant, NewbornSyndromeBody PatterningPregnancyEchocardiographyAsiaGestational AgeSpleenModels, MolecularStomachRetrospective StudiesProtein ConformationTreatment OutcomeFollow-Up Studies