Atrioventricular NodeHeart Conduction SystemArrhythmias, CardiacBundle of HisTachycardia, Atrioventricular Nodal ReentryHeart BlockElectrocardiographySinoatrial NodeCardiac Pacing, ArtificialCatheter AblationNeural ConductionElectrophysiologic Techniques, CardiacNAV1.5 Voltage-Gated Sodium ChannelTachycardia, ParoxysmalHeart AtriaTachycardiaPurkinje FibersHeartTachycardia, SupraventricularMyocytes, CardiacWolff-Parkinson-White SyndromeAtrioventricular BlockCardiac ElectrophysiologyAnti-Arrhythmia AgentsLymph NodesConnexinsHeart VentriclesAction PotentialsMyocardiumAtrial FibrillationModels, CardiovascularElectrophysiologyPacemaker, ArtificialHeart RateAtrial FlutterSodium ChannelsAtrial FunctionDogsDeath, Sudden, CardiacTachycardia, Ectopic JunctionalRefractory Period, ElectrophysiologicalArrhythmia, SinusSinus Arrest, CardiacSick Sinus SyndromeConnexin 43ElectrocoagulationBradycardiaTime FactorsHeart SeptumTachycardia, Ectopic AtrialBrugada SyndromeRabbitsVagus NerveMyotonic DystrophyKearns-Sayre SyndromeBody Surface Potential MappingSp4 Transcription FactorUltimobranchial BodyHeart DiseasesTachycardia, VentricularFollow-Up StudiesLong QT SyndromeRadio WavesBundle-Branch BlockGap JunctionsCardiac OutputVentricular FunctionVentricular FibrillationCardiomyopathy, DilatedTreatment OutcomeHeart NeoplasmsT-Box Domain ProteinsElectric StimulationTricuspid ValveCardiac Surgical ProceduresMice, TransgenicMicroelectrodesMutationMuscle ProteinsMuscular Dystrophy, Emery-DreifussDisease Models, AnimalPhenotypeLymph Node ExcisionVentricular Premature ComplexesCardiac Complexes, PrematureLamin Type AGene Expression Regulation, DevelopmentalRetrospective StudiesElectrocardiography, AmbulatoryMembrane PotentialsMyocardial ContractionPedigreeAdenosineAtropineLac OperonRanvier's NodesSentinel Lymph Node BiopsySyndromeCardiomyopathiesCardiomegaly