Heart Septal Defects, AtrialHeart Septal DefectsHeart Septal Defects, VentricularEndocardial Cushion DefectsHeart BlockAtrioventricular NodeAngiocardiographyHeart Conduction SystemHeart SeptumAtrioventricular BlockSeptal Occluder DeviceElectrocardiographyBundle of HisHeart Defects, CongenitalBundle-Branch BlockCardiac CatheterizationArrhythmias, CardiacHeartAtrial SeptumEchocardiography, TransesophagealNeural ConductionBalloon OcclusionEchocardiographyHeart AtriaNAV1.5 Voltage-Gated Sodium ChannelProstheses and ImplantsCardiac Surgical ProceduresHeart ValvesForamen OvalePacemaker, ArtificialHeart RateSick Sinus SyndromeProsthesis ImplantationSinoatrial NodePulmonary Valve StenosisConnexinsMuscular Dystrophy, Emery-DreifussEchocardiography, Doppler, ColorCardiac Pacing, ArtificialWolff-Parkinson-White SyndromeHeart VentriclesTreatment OutcomeAbnormalities, MultipleCardiomyopathy, DilatedTransposition of Great VesselsHeart InjuriesEbstein AnomalyAtrial FunctionTetralogy of FallotBradycardiaAtrial FlutterAtrial FibrillationAortopulmonary Septal DefectConnexin 43Pulmonary VeinsMutationMyocardiumTachycardia, SupraventricularFollow-Up StudiesMyotonic DystrophyTime FactorsCardiomyopathiesCardiovascular Surgical ProceduresCatheter AblationTricuspid ValveInfant, NewbornFetal DiseasesPedigreeHeart AneurysmSinoatrial BlockPulmonary AtresiaPhenotypeLamin Type APulmonary Subvalvular StenosisPulmonary ArteryFluoroscopyEchocardiography, Three-DimensionalElectrophysiologic Techniques, CardiacDogsTachycardiaFetal HeartCyanosisCoronary Vessel AnomaliesSodium ChannelsDuctus Arteriosus, PatentCardiopulmonary BypassCardiac Complexes, PrematureRetrospective StudiesHemodynamicsVena Cava, SuperiorDextrocardiaHeart DiseasesIatrogenic DiseaseHeart MurmursPostoperative ComplicationsPhonocardiographyElectrophysiologyCardiovascular AbnormalitiesAortic Stenosis, SubvalvularTruncus Arteriosus, Persistent