Neural ConductionHeart Conduction SystemPeripheral NervesAtrioventricular NodeImpulse Control DisordersAction PotentialsHeart BlockPeripheral Nervous System DiseasesElectric StimulationPeripheral Nervous SystemAxonsElectrocardiographyMedian NerveElectrophysiologyBone ConductionRefractory Period, ElectrophysiologicalSciatic NerveNeurons, AfferentCardiac Pacing, ArtificialTime FactorsUlnar NerveArrhythmias, CardiacMotor NeuronsHeart AtriaCatsTibial NerveNerve FibersPeripheral Vascular DiseasesMechanoreceptorsElectrophysiologic Techniques, CardiacSural NerveDogsPurkinje FibersSinoatrial NodeDiabetic NeuropathiesPeroneal NerveAtrioventricular BlockRanvier's NodesEvoked PotentialsElectrodiagnosis