Membrane PotentialsPatch-Clamp TechniquesElectrophysiologyElectric ConductivityIon Channel GatingAction PotentialsIon ChannelsPotassiumOocytesXenopus laevisPotassium ChannelsSodiumCalciumGlucose Clamp TechniqueTetrodotoxinBariumTetraethylammonium CompoundsKineticsCalcium ChannelsTetraethylammoniumDecapodiformesXenopusCesiumNeuronsElectric StimulationRNA, ComplementaryGuinea PigsPotassium Channels, Voltage-GatedMicroelectrodesPurkinje FibersChloridesAnuraSodium ChannelsTime FactorsPotassium Channel BlockersMolluscaRana pipiensHelix (Snails)Rana esculentaCalcium Channel BlockersCalcium Channels, L-TypeVentricular FunctionHeartModels, BiologicalIon TransportPetrolatumCell MembraneShaker Superfamily of Potassium ChannelsSodium Channel BlockersMyocardiumMathematicsDose-Response Relationship, DrugEgtazic AcidRana catesbeianaChloride ChannelsEther-A-Go-Go Potassium ChannelsCell Membrane PermeabilityMusclesRana temporariaHeart Conduction SystemHeart VentriclesBiophysicsAxonsHydrogen-Ion ConcentrationBiophysical Phenomena4-AminopyridineConductometryComputers, AnalogElectric CapacitanceAcetylcholineAmbystomaCationsCaffeineRabbitsRats, Sprague-DawleyPotassium Channels, Inwardly RectifyingCobaltgamma-Aminobutyric AcidSinoatrial NodeSynaptic TransmissionSynapsesFluorometryAtrial FunctionArsenazo IIIElectrophysiological PhenomenaNeural ConductionModels, NeurologicalGallopamilStrontiumSarcoplasmic ReticulumElectricityCadmiumElectrodesNifedipineGangliaLidocaineAplysiaMyocytes, CardiacAminopyridinesHyperpolarization-Activated Cyclic Nucleotide-Gated Channels