Atrioventricular NodeHeart Conduction SystemBundle of HisTachycardia, Atrioventricular Nodal ReentryHeart BlockSinoatrial NodeElectrocardiographyCardiac Pacing, ArtificialArrhythmias, CardiacCatheter AblationNeural ConductionElectrophysiologic Techniques, CardiacCircadian RhythmNAV1.5 Voltage-Gated Sodium ChannelTachycardia, ParoxysmalPurkinje FibersHeart AtriaHeartWolff-Parkinson-White SyndromeTachycardiaLymph NodesTachycardia, SupraventricularAtrioventricular BlockMyocytes, CardiacCardiac ElectrophysiologyConnexinsAction PotentialsHeart VentriclesAtrial FibrillationAnti-Arrhythmia AgentsMyocardiumElectrophysiologyPacemaker, ArtificialModels, CardiovascularAtrial FunctionTachycardia, Ectopic JunctionalSodium ChannelsSinus Arrest, CardiacHeart RateAtrial FlutterRefractory Period, ElectrophysiologicalDogsSick Sinus SyndromeElectrocoagulationDeath, Sudden, CardiacConnexin 43Brugada SyndromeTime FactorsHeart SeptumKearns-Sayre SyndromeBradycardiaMyotonic DystrophyRabbitsTachycardia, Ectopic AtrialVagus NerveSp4 Transcription FactorUltimobranchial BodyBody Surface Potential MappingRadio WavesBundle-Branch BlockHeart DiseasesCardiac OutputFollow-Up StudiesGap JunctionsHeart NeoplasmsT-Box Domain ProteinsVentricular FunctionElectric StimulationTricuspid ValveTreatment OutcomeCardiomyopathy, DilatedMice, TransgenicMicroelectrodesMutationCardiac Surgical ProceduresMuscular Dystrophy, Emery-DreifussMuscle ProteinsLymph Node ExcisionPhenotypeGene Expression Regulation, DevelopmentalLamin Type ALong QT SyndromeDisease Models, AnimalMembrane PotentialsLac OperonAdenosineRanvier's NodesSentinel Lymph Node BiopsyRetrospective StudiesPedigreeAtropine