Heart Septal Defects, AtrialHeart Septal Defects, VentricularHeart Septal DefectsVentricular SeptumHeart BlockAtrioventricular NodeHeart SeptumHeart Conduction SystemPulmonary AtresiaAtrioventricular BlockHeart Defects, CongenitalSeptal Occluder DeviceElectrocardiographyBundle of HisCardiac CatheterizationBundle-Branch BlockHeartAtrial SeptumArrhythmias, CardiacPulmonary Valve StenosisPulmonary ValveEchocardiographyTransposition of Great VesselsHeart VentriclesEchocardiography, TransesophagealCardiac Surgical ProceduresNeural ConductionHeart AtriaBalloon OcclusionTricuspid ValveNAV1.5 Voltage-Gated Sodium ChannelProstheses and ImplantsEchocardiography, Doppler, ColorInfant, NewbornPacemaker, ArtificialHeart RateAbnormalities, MultipleSick Sinus SyndromeSinoatrial NodeProsthesis ImplantationFetal HeartFetal DiseasesConnexinsTruncus Arteriosus, PersistentTreatment OutcomeMuscular Dystrophy, Emery-DreifussMyocardiumWolff-Parkinson-White SyndromeCardiac Pacing, ArtificialPulmonary ArteryDouble Outlet Right VentricleCardiomyopathy, DilatedCatheterizationFollow-Up StudiesHeart InjuriesEbstein AnomalyTetralogy of FallotTime FactorsBradycardiaAtrial FlutterDuctus Arteriosus, PatentConnexin 43CineangiographyAtrial FunctionAortopulmonary Septal DefectCatheter AblationVentricular Septal RuptureAngiocardiographyCardiomyopathiesTachycardia, SupraventricularMyotonic DystrophyCardiovascular Surgical ProceduresEndocardial Cushion DefectsDogsMutationHeart AneurysmAtrial FibrillationSeptum of BrainPedigreeSinoatrial BlockMitral ValveTricuspid AtresiaLamin Type APulmonary Subvalvular StenosisRetrospective StudiesVentricular Outflow ObstructionEchocardiography, Three-DimensionalPhenotypeHeart ValvesTachycardiaPregnancyCardiomyopathy, HypertrophicCyanosisFluoroscopyUltrasonography, PrenatalVentricular FunctionSeptum PellucidumSodium ChannelsCardiopulmonary BypassElectrophysiologic Techniques, Cardiac