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 VeinTachycardia, SupraventricularSinoatrial NodeHeart BlockVocalization, AnimalUltrasonography, PrenatalHeart ValvesAtrial AppendageHeart Septal Defects, AtrialMagnetic Resonance SpectroscopyProlinePrenatal DiagnosisInfant, NewbornSyndromeBody PatterningHouse CallsStereoisomerismPregnancyEchocardiographyHotlinesAsiaEcholocationGestational AgeEmergency Medical Service Communication SystemsMolecular StructureModels, MolecularSpleenRetrospective StudiesTelephoneStomachAnimal CommunicationChiropteraTreatment OutcomeTime FactorsSound SpectrographyProtein ConformationFollow-Up StudiesAmbulancesAcousticsOrthopteraPoison Control CentersHospital Communication SystemsAfter-Hours CareNight CareEmergency Medical ServicesPasseriformesPredatory BehaviorTriageAcoustic StimulationBatrachoidiformesRemote ConsultationSoundSexual Behavior, AnimalAuditory PerceptionCellular PhoneEaglesHawksAnuraSongbirdsHerpestidaeTape RecordingSocial BehaviorUltrasonicsEmergenciesParrots