Heart Septal Defects, AtrialHeart Septal Defects, VentricularAtrioventricular NodeHeart Septal DefectsHeart Conduction SystemHeart BlockWolff-Parkinson-White SyndromeElectrocardiographyEbstein AnomalyPre-Excitation SyndromesAtrioventricular BlockSeptal Occluder DeviceBundle of HisHeart Defects, CongenitalBundle-Branch BlockTachycardia, SupraventricularCardiac CatheterizationCatheter AblationTachycardia, ParoxysmalArrhythmias, CardiacTachycardia, Atrioventricular Nodal ReentryHeartCardiac Pacing, ArtificialAtrial SeptumEchocardiography, TransesophagealHeart SeptumNeural ConductionBalloon OcclusionEchocardiographyNAV1.5 Voltage-Gated Sodium ChannelAtrial FibrillationProstheses and ImplantsHeart AtriaCardiac Surgical ProceduresPacemaker, ArtificialHeart RateSick Sinus SyndromeSinoatrial NodeProsthesis ImplantationPulmonary Valve StenosisConnexinsMuscular Dystrophy, Emery-DreifussEchocardiography, Doppler, ColorHeart VentriclesCardiomyopathy, DilatedAbnormalities, MultipleHeart InjuriesBradycardiaTetralogy of FallotTreatment OutcomeTransposition of Great VesselsAtrial FlutterConnexin 43Aortopulmonary Septal DefectAtrial FunctionMyocardiumAngiocardiographyMyotonic DystrophyCardiomyopathiesCardiovascular Surgical ProceduresEndocardial Cushion DefectsTricuspid ValveMutationTime FactorsFetal DiseasesFollow-Up StudiesInfant, NewbornHeart AneurysmPedigreeSinoatrial BlockPulmonary AtresiaLamin Type APulmonary Subvalvular StenosisPulmonary ArteryEchocardiography, Three-DimensionalPhenotypeDogsFetal HeartTachycardiaHeart ValvesCyanosisFluoroscopySodium ChannelsDuctus Arteriosus, PatentCardiopulmonary BypassCardiac Complexes, PrematurePulmonary VeinsElectrophysiologic Techniques, CardiacVena Cava, SuperiorDextrocardiaHeart DiseasesIatrogenic DiseasePhonocardiographyHemodynamicsHeart MurmursElectrophysiologyAortic Stenosis, SubvalvularRetrospective StudiesCardiovascular AbnormalitiesAortic Coarctation