SodiumCell Membrane PermeabilityGermine AcetatesCevanesOuabainPotassiumPermeabilityAnuraMembrane PotentialsStrophanthidinSodium IsotopesSodium ChannelsCalciumCapillary PermeabilityPurkinje FibersDysprosiumCardiac GlycosidesSodium-Potassium-Exchanging ATPaseBiological Transport, ActiveVeratrineSodium ChloridePhotometryVeratridineRubidiumSodium Channel BlockersIon ChannelsAmilorideSodium, DietaryMonensinIntracellular FluidTetrodotoxinBufo bufoOpossumsLithiumSodium-Hydrogen AntiporterSheepMyocardial ContractionHeart Conduction SystemExtracellular SpaceMagnetic Resonance SpectroscopySodium-Calcium ExchangerBenzofuransBiological TransportHydrogen-Ion ConcentrationErythrocytesMyocardiumAcetanilidesLidocaineIon TransportOsmolar ConcentrationSodium Dodecyl SulfatePerfusionCardiac Complexes, PrematurePapillary MusclesKineticsEthers, CyclicSodium BicarbonateTime FactorsAction PotentialsGuinea PigsMicroelectrodesHeartIntracellular MembranesEpithelial Sodium ChannelsElectrophysiologyDogsKidney Tubules, ProximalSodium NitriteCell MembraneRats, Sprague-DawleySodium CompoundsCromolyn SodiumSodium SalicylateCells, CulturedSodium AzideMagnesiumFluorescent DyesRats, Inbred StrainsAdenosine TriphosphateHypertensionRats, WistarPatch-Clamp TechniquesTemperatureMannitolTight JunctionsWaterModels, BiologicalSodium HypochloriteSodium AcetateBlood-Brain BarrierSodium Chloride, DietaryNorepinephrineElectric StimulationCell LineNAV1.5 Voltage-Gated Sodium ChannelSodium RadioisotopesChloridesSodium FluorideWater-Electrolyte BalanceDiet, Sodium-Restricted