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 TriphosphateKineticsSodium Channel BlockersPotassium Channels, Calcium-ActivatedNeuronsMyocytes, Cardiac4-AminopyridineAjmalineMyocardiumTetraethylammoniumHeartIon TransportCesiumTetrodotoxinCell MembraneRabbitsVentricular FunctionElectric StimulationRats, Sprague-DawleyPotassium Channels, Inwardly RectifyingXenopus laevisRats, WistarTetraethylammonium CompoundsQuinidineHypotonic SolutionsDihydropyridinesCationsGlyburideNifedipineTime FactorsSodium CyanidePinacidilOocytesCell LineNiflumic AcidHeart AtriaCalcium Channel AgonistsDelayed Rectifier Potassium ChannelsMuscle CellsNodose GanglionFlufenamic AcidAnti-Arrhythmia AgentsAnesthetics, InhalationAcetylcholineMibefradilgamma-Aminobutyric AcidLarge-Conductance Calcium-Activated Potassium ChannelsEgtazic AcidKATP ChannelsNickelSinoatrial NodeCell Membrane PermeabilityGanglia, SpinalCalcium SignalingXenonReceptors, GABA-ASynaptic TransmissionInsulinThionucleotidesIsofluraneAmilorideFura-2Cyclic AMP-Dependent Protein KinasesCadmiumIonsXenopusMuscle, SmoothReceptors, MuscarinicProtein Kinase CSodium-Calcium ExchangerCyclic AMPOsmolar ConcentrationChelating AgentsSarcolemmaPeyer's Patches