Heart Conduction SystemNeural ConductionHeartHeart RateAtrioventricular NodeHeart BlockHeart FailureHeart AtriaHeart DiseasesElectrocardiographyHeart Defects, CongenitalAction PotentialsHeart TransplantationCardiac Pacing, ArtificialTime FactorsBone ConductionFetal HeartMedian NerveRefractory Period, ElectrophysiologicalArrhythmias, CardiacMyocardiumElectrophysiologic Techniques, CardiacConfidence IntervalsDogsHeart ValvesUlnar NerveAtrioventricular BlockRisk FactorsElectrophysiologySinoatrial NodePeripheral NervesMyocytes, CardiacElectric StimulationMyocardial ContractionPurkinje FibersModels, CardiovascularAtrial FibrillationCatheter AblationTibial NerveAnti-Arrhythmia AgentsProspective StudiesFollow-Up StudiesAtrial FlutterAtrial FunctionAxonsElectrodiagnosisAphasia, ConductionTreatment OutcomeSural NerveWolff-Parkinson-White SyndromeNAV1.5 Voltage-Gated Sodium ChannelPeripheral Nervous System DiseasesTachycardiaConnexin 43Motor NeuronsDiabetic NeuropathiesHeart Function TestsMyocardial IschemiaSodium ChannelsSciatic NervePeroneal NerveTachycardia, Atrioventricular Nodal ReentryHeart SeptumRanvier's NodesHeart VentriclesHeart Arrest, InducedHemodynamicsElectromyographyCohort StudiesEndocardiumBundle-Branch BlockCase-Control StudiesBody Surface Potential MappingMyocardial InfarctionCardiomyopathy, DilatedCoronary DiseaseCarpal Tunnel SyndromeVentricular Function, LeftConnexinsTachycardia, SupraventricularRetrospective StudiesCardiomyopathiesPerfusionEchocardiographyNerve Fibers, MyelinatedGap JunctionsRabbitsTachycardia, VentricularNerve FibersElectric ConductivityDisease Models, AnimalNeurons, AfferentPolyneuropathiesRats, Sprague-DawleyCardiac Complexes, PrematureIncidenceVentricular FibrillationLidocaineVagus NerveVentricular Function