Atrioventricular NodeHeart Conduction SystemTachycardia, Atrioventricular Nodal ReentryBundle of HisHeart BlockSinoatrial NodeElectrocardiographyCardiac Pacing, ArtificialCatheter AblationLymph NodesArrhythmias, CardiacNeural ConductionTachycardia, SupraventricularTachycardia, ParoxysmalElectrophysiologic Techniques, CardiacNAV1.5 Voltage-Gated Sodium ChannelHeart AtriaWolff-Parkinson-White SyndromeAtrioventricular BlockPurkinje FibersHeartTachycardiaMyocytes, CardiacConnexinsCardiac ElectrophysiologyElectrophysiologyAtrial FunctionHeart VentriclesAction PotentialsAnti-Arrhythmia AgentsAtrial FibrillationRefractory Period, ElectrophysiologicalMyocardiumDogsAtrial FlutterElectrocoagulationHeart RatePacemaker, ArtificialModels, CardiovascularTachycardia, Ectopic JunctionalSodium ChannelsSinus Arrest, CardiacSick Sinus SyndromeRabbitsTime FactorsConnexin 43Lymph Node ExcisionDeath, Sudden, CardiacBrugada SyndromeHeart SeptumBradycardiaKearns-Sayre SyndromeMyotonic DystrophyVagus NerveTachycardia, Ectopic AtrialAutonomic AgentsFollow-Up StudiesSentinel Lymph Node BiopsySp4 Transcription FactorUltimobranchial BodyVentricular FunctionRadio WavesBody Surface Potential MappingMicroelectrodesBundle-Branch BlockCardiac OutputHeart DiseasesGap JunctionsRanvier's NodesElectric StimulationTreatment OutcomeLymphatic MetastasisT-Box Domain ProteinsHeart NeoplasmsAdenosineTricuspid ValveMice, TransgenicPre-Excitation SyndromesCardiomyopathy, DilatedTachycardia, Sinoatrial Nodal ReentryMuscle ProteinsMuscular Dystrophy, Emery-DreifussMutationCardiac Surgical ProceduresPhenotypeGene Expression Regulation, DevelopmentalAccessory Atrioventricular BundleLamin Type APre-Excitation, Mahaim-TypeLong QT SyndromeDisease Models, AnimalRetrospective Studies