Heart BlockHeart Conduction SystemAtrioventricular BlockNeural ConductionElectrocardiographyPacemaker, ArtificialArrhythmias, CardiacAtrioventricular NodeSinoatrial BlockBundle-Branch BlockBundle of HisBradycardiaSinus Arrest, CardiacCardiac Pacing, ArtificialSick Sinus SyndromeHeart AtriaMyotonic DystrophyNAV1.5 Voltage-Gated Sodium ChannelElectrophysiologic Techniques, CardiacSyncopeHeart Valve Prosthesis ImplantationHeart VentriclesAortic Valve StenosisElectrophysiologyAtrial FibrillationCardiac CatheterizationHeartEchocardiographyTime FactorsMyocardiumHeart RateFollow-Up StudiesTreatment OutcomeAction PotentialsBone ConductionMedian NerveSleep DisordersRefractory Period, ElectrophysiologicalUlnar NervePeripheral NervesTibial NerveAxonsAphasia, ConductionAtrial FlutterSural NerveElectrodiagnosisPeripheral Nervous System DiseasesPurkinje FibersSinoatrial NodeElectric StimulationCatheter AblationWolff-Parkinson-White SyndromeDiabetic NeuropathiesMotor NeuronsSciatic NerveAtrial FunctionDogsElectromyographyConnexin 43Ranvier's NodesTachycardia, Atrioventricular Nodal ReentryPeroneal NerveSodium ChannelsCarpal Tunnel SyndromeBody Surface Potential MappingModels, CardiovascularAnti-Arrhythmia AgentsNerve Fibers, MyelinatedConnexinsTachycardiaPolyneuropathiesTachycardia, SupraventricularElectric ConductivityNerve FibersGap JunctionsNeurons, AfferentEvoked Potentials, SomatosensoryMyelin SheathTachycardia, ParoxysmalReaction TimeVentricular FunctionFlecainideSpinal Nerve RootsDemyelinating DiseasesLidocaineParesthesiaEvoked PotentialsProcainamideCardiac Complexes, PrematureMenstruation DisturbancesDyssomniasVoltage-Sensitive Dye ImagingMembrane PotentialsTachycardia, VentricularEndocardiumMyocytes, CardiacCardiac ElectrophysiologyPericardiumBrugada SyndromeCats