Purkinje FibersPurkinje CellsHeart Conduction SystemStrophanthidinAction PotentialsDogsSheepNerve FibersMembrane PotentialsCerebellumMicroelectrodesPotassiumSodiumCerebellar CortexLidocaineElectrophysiologyDietary FiberMuscle Fibers, SkeletalHeartBenzocaineCesiumIon ChannelsTetrodotoxinPapillary MusclesNisoldipineCalciumElectric StimulationDigitalis GlycosidesVentricular FunctionMyocardial ContractionMinke WhaleElectric ConductivityMice, Neurologic MutantsArrhythmias, CardiacGallopamilMineral FibersTime FactorsHeart VentriclesOuabainEndocardiumCardiac GlycosidesQuinidineMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchDioxanesBariumAnti-Arrhythmia AgentsCotton FiberAequorinBundle of HisIncubatorsRefractory Period, ElectrophysiologicalTolazamideDendritesFur SealsRabbitsAminopyridinesSinoatrial NodeBarium CompoundsDisopyramideMyocardiumConnexinsHalothaneChloridesProcainamideAcetohexamideCerebellar NucleiOlivary NucleusStrontiumBiological Transport, ActiveKineticsSodium CyanideMexiletineVeratridineStress FibersMyofibrilsCattleRyanodineRubidiumSodium ChannelsPatch-Clamp TechniquesVerapamilAtaxia