Purkinje FibersPurkinje CellsHeart Conduction SystemStrophanthidinNerve FibersAction PotentialsDogsDietary FiberMuscle Fibers, SkeletalMembrane PotentialsSheepCerebellumMicroelectrodesMineral FibersPotassiumSodiumMuscle Fibers, Fast-TwitchCerebellar CortexMuscle Fibers, Slow-TwitchCotton FiberLidocaineElectrophysiologyHeartBenzocaineElectric StimulationCesiumCalciumIon ChannelsTetrodotoxinStress FibersPapillary MusclesTime FactorsNisoldipineDigitalis GlycosidesMyocardial ContractionVentricular FunctionNerve Fibers, MyelinatedMice, Neurologic MutantsMinke WhaleGallopamilElectric ConductivityArrhythmias, CardiacHeart VentriclesOuabainMossy Fibers, HippocampalMusclesMuscle ContractionEndocardiumRabbitsCardiac GlycosidesQuinidineMyofibrilsBariumAequorinDioxanesAnti-Arrhythmia AgentsBundle of HisRefractory Period, ElectrophysiologicalIncubatorsDendritesTolazamideAminopyridinesFur SealsMyocardiumSinoatrial NodeBarium CompoundsOlivary NucleusChloridesConnexinsMuscle, SkeletalDisopyramideStrontiumHalothaneKineticsCerebellar NucleiNeural ConductionMyosin Heavy ChainsProcainamideCattleAcetohexamideBiological Transport, ActiveSodium CyanideMexiletinePatch-Clamp TechniquesVeratridineImmunohistochemistrySodium ChannelsRyanodineRubidiumAxonsSynapsesCalbindinsAtaxiaVerapamilIsoproterenol