Patch-Clamp TechniquesMembrane PotentialsElectrophysiologyPotassium ChannelsGlucose Clamp TechniqueElectric ConductivityIon ChannelsCalciumAction PotentialsMicromanipulationCalcium ChannelsIon Channel GatingSodium ChannelsGuinea PigsElasticityChloride ChannelsPotassiumErythrocyte DeformabilityPotassium Channel BlockersBariumCalcium Channels, L-TypeCalcium Channel BlockersViscosityCell MembraneCells, CulturedKineticsAdenosine TriphosphateSodiumDose-Response Relationship, DrugNeuronsPotassium Channels, Voltage-GatedSuctionElectric StimulationChloridesHeart VentriclesRabbitsRats, Sprague-DawleyTime FactorsModels, BiologicalBiophysicsSodium Channel BlockersPotassium Channels, Calcium-ActivatedMicroelectrodesMicroscopy, VideoMyocytes, Cardiac4-AminopyridinePressureAcetylcholineAjmalineMyocardiumTetraethylammoniumHeartCell SizeIon TransportBiophysical PhenomenaCesiumIontophoresisTetrodotoxinErythrocyte MembraneStress, MechanicalVentricular FunctionMathematicsPotassium Channels, Inwardly RectifyingXenopus laevisRats, WistarTetraethylammonium CompoundsQuinidineHypotonic SolutionsDihydropyridinesCationsGlyburideNifedipineSodium CyanidePinacidilOocytesExtracellular SpaceCell LineNiflumic AcidHeart AtriaCalcium Channel AgonistsDelayed Rectifier Potassium ChannelsCheekArteriolesMuscle CellsNodose GanglionFlufenamic AcidSingle-Cell AnalysisAnti-Arrhythmia AgentsSurface TensionFluorescent DyesAnesthetics, InhalationMibefradilgamma-Aminobutyric AcidLarge-Conductance Calcium-Activated Potassium ChannelsErythrocytesEgtazic AcidKATP ChannelsNickelSinoatrial NodeCell Membrane Permeability