Membrane PotentialsCell MembraneMembrane Potential, MitochondrialIntracellular MembranesMembranesMembrane LipidsMyocytes, CardiacPlasmaMembranes, ArtificialCalciumPotassiumCell Membrane PermeabilityHeartTime FactorsCardiac OutputMitochondriaErythrocyte MembraneMembrane FluiditySodiumElectrophysiologyAction PotentialsCells, CulturedElectric ConductivityArrhythmias, CardiacPatch-Clamp TechniquesBasement MembraneIon ChannelsCardiac Surgical ProceduresHydrogen-Ion ConcentrationMitochondrial MembranesValinomycinPotassium ChannelsModels, BiologicalDeath, Sudden, CardiacRats, Sprague-DawleyCell LineMembrane Transport ProteinsAdenosine TriphosphateMyocardiumGuinea PigsChloridesMicroscopy, ElectronDose-Response Relationship, DrugProtein TransportNeuronsMembrane GlycoproteinsFluorescent DyesRabbitsCarrier ProteinsDogsBiological Transport, ActiveKineticsRats, WistarLipid BilayersPlasma CellsProtein BindingMolecular Sequence DataTrityl CompoundsMutationApoptosisCarbonyl Cyanide p-TrifluoromethoxyphenylhydrazoneHeart VentriclesMyocardial ContractionMicroscopy, FluorescenceSignal TransductionElectric StimulationOuabainSynaptic MembranesLiposomesCarbonyl Cyanide m-Chlorophenyl HydrazoneCardiac Pacing, ArtificialAmino Acid SequenceCardiomegalyMicroscopy, ConfocalHeart DiseasesIon Channel GatingMicroelectrodesCardiac TamponadeTetrodotoxinCell FractionationTemperatureSodium-Potassium-Exchanging ATPaseProtein Structure, TertiaryCattleCalcium ChannelsReactive Oxygen SpeciesCardiac CatheterizationBlotting, WesternCarbocyaninesElectrophoresis, Polyacrylamide GelPermeabilityOsmolar ConcentrationRats, Inbred StrainsCytosolCholesterolBariumLiverRNA, MessengerPotassium Channel BlockersEndoplasmic Reticulum