Heart Septal Defects, AtrialHeart Septal Defects, VentricularHeart Septal DefectsHeart BlockAtrioventricular NodeHeart Conduction SystemAtrioventricular BlockSeptal Occluder DeviceElectrocardiographyBundle of HisHeart Defects, CongenitalBundle-Branch BlockCardiac CatheterizationArrhythmias, CardiacHeartAtrial SeptumEchocardiography, TransesophagealHeart SeptumNeural ConductionBalloon OcclusionEchocardiographyNAV1.5 Voltage-Gated Sodium ChannelProstheses and ImplantsHeart AtriaCardiac Surgical ProceduresPacemaker, ArtificialHeart RateSick Sinus SyndromeSinoatrial NodeProsthesis ImplantationPulmonary Valve StenosisConnexinsMuscular Dystrophy, Emery-DreifussEchocardiography, Doppler, ColorWolff-Parkinson-White SyndromeCardiac Pacing, ArtificialHeart VentriclesCardiomyopathy, DilatedAbnormalities, MultipleHeart InjuriesEbstein AnomalyTreatment OutcomeBradycardiaTetralogy of FallotTransposition of Great VesselsAtrial FlutterConnexin 43Aortopulmonary Septal DefectAtrial FunctionMyocardiumAngiocardiographyTachycardia, SupraventricularMyotonic DystrophyCardiomyopathiesCardiovascular Surgical ProceduresEndocardial Cushion DefectsTricuspid ValveMutationTime FactorsAtrial FibrillationFollow-Up StudiesFetal DiseasesInfant, NewbornHeart AneurysmPedigreeSinoatrial BlockPulmonary AtresiaLamin Type APulmonary Subvalvular StenosisPulmonary ArteryEchocardiography, Three-DimensionalPhenotypeDogsFetal HeartTachycardiaHeart ValvesCyanosisFluoroscopySodium ChannelsCatheter AblationDuctus Arteriosus, PatentCardiopulmonary BypassCardiac Complexes, PrematurePulmonary VeinsElectrophysiologic Techniques, CardiacVena Cava, SuperiorDextrocardiaHeart DiseasesIatrogenic DiseasePhonocardiographyHemodynamicsHeart MurmursElectrophysiologyAortic Stenosis, SubvalvularRetrospective StudiesCardiovascular AbnormalitiesAortic CoarctationTruncus Arteriosus, PersistentVentricular Septal RuptureSitus Inversus