Atrioventricular NodeHeart Conduction SystemHeart BlockNeural ConductionBundle of HisAtrioventricular BlockElectrocardiographySick Sinus SyndromeSinoatrial NodePacemaker, ArtificialWolff-Parkinson-White SyndromeCardiac Pacing, ArtificialArrhythmias, CardiacBradycardiaHeart AtriaTachycardia, SupraventricularAtrial FlutterSinoatrial BlockAtrial FunctionElectrophysiologic Techniques, CardiacTachycardiaHeartHeart RateConnexinsElectrophysiologyBundle-Branch BlockCardiac Complexes, PrematureAtrial FibrillationCatheter AblationDogsHeart VentriclesTachycardia, Atrioventricular Nodal ReentryFetal DiseasesVagus NerveAnti-Arrhythmia AgentsVerapamilHalothaneAction PotentialsBone ConductionEnfluraneVentricular FunctionMedian NerveTime FactorsMyocardiumGuinea PigsCardiac CatheterizationRefractory Period, ElectrophysiologicalUlnar NerveEchocardiographyMyocardial ContractionPeripheral NervesIsofluraneTibial NerveAphasia, ConductionElectrodiagnosisAxonsAdenosineSural NervePurkinje FibersPeripheral Nervous System DiseasesElectric StimulationFollow-Up StudiesVentricular Function, LeftSciatic NerveMotor NeuronsCoronary CirculationDiabetic NeuropathiesNAV1.5 Voltage-Gated Sodium ChannelRanvier's NodesConnexin 43Peroneal NerveBlood PressureCarpal Tunnel SyndromeSodium ChannelsBody Surface Potential MappingElectromyographyTreatment OutcomeModels, CardiovascularNerve Fibers, MyelinatedPregnancyPolyneuropathiesElectric ConductivityNerve FibersGap JunctionsNeurons, AfferentEvoked Potentials, SomatosensoryMyelin SheathTachycardia, ParoxysmalFlecainideSpinal Nerve RootsLidocaineProcainamideDemyelinating DiseasesReaction TimeVoltage-Sensitive Dye ImagingEvoked PotentialsEndocardiumMembrane PotentialsCardiac ElectrophysiologyPericardium