Patch-Clamp TechniquesMembrane PotentialsPotassium ChannelsElectrophysiologyGlucose Clamp TechniqueIon ChannelsCalcium ChannelsElectric ConductivityIon Channel GatingCalciumSodium ChannelsAction PotentialsChloride ChannelsGuinea PigsPotassium Channel BlockersBariumCalcium Channels, L-TypePotassiumCalcium Channel BlockersSodiumPotassium Channels, Voltage-GatedChloridesHeart VentriclesDose-Response Relationship, DrugCells, CulturedAdenosine TriphosphateKineticsNeuronsSodium Channel BlockersPotassium Channels, Calcium-ActivatedMyocytes, Cardiac4-AminopyridineAjmalineMyocardiumTetraethylammoniumHeartIon TransportCesiumTetrodotoxinCell MembraneRabbitsElectric StimulationRats, Sprague-DawleyVentricular FunctionRNA, GuidePotassium Channels, Inwardly RectifyingXenopus laevisRats, WistarTetraethylammonium CompoundsQuinidineHypotonic SolutionsDihydropyridinesCationsTime FactorsGlyburideNifedipineSodium CyanidePinacidilOocytesCell LineHeart AtriaNiflumic AcidCalcium Channel AgonistsDelayed Rectifier Potassium ChannelsMuscle CellsNodose GanglionFlufenamic AcidAnti-Arrhythmia AgentsAnesthetics, InhalationAcetylcholineMibefradilgamma-Aminobutyric AcidLarge-Conductance Calcium-Activated Potassium ChannelsEgtazic AcidKATP ChannelsNickelSinoatrial NodeGanglia, SpinalCell Membrane PermeabilityCalcium SignalingXenonReceptors, GABA-ASynaptic TransmissionInsulinThionucleotidesIsofluraneAmilorideFura-2IonsModels, BiologicalCyclic AMP-Dependent Protein KinasesCadmiumXenopusMuscle, SmoothReceptors, MuscarinicProtein Kinase CSodium-Calcium ExchangerCyclic AMPOsmolar ConcentrationChelating Agents