Patch-Clamp TechniquesMembrane PotentialsElectrophysiologyCardiac ElectrophysiologyElectrophysiological PhenomenaAction PotentialsElectrophysiological ProcessesPotassium ChannelsGlucose Clamp TechniqueIon ChannelsIon Channel GatingElectrophysiologic Techniques, CardiacCalciumSodium ChannelsNeuronsElectric ConductivityCalcium ChannelsChloride ChannelsArrhythmias, CardiacPotassium Channel BlockersHeart Conduction SystemPotassiumPotassium Channels, Voltage-GatedRats, Sprague-DawleyPeyer's PatchesMyocytes, Cardiac