SodiumOuabainCardiac GlycosidesSodium-Potassium-Exchanging ATPasePotassiumErythrocytesSodium IsotopesHyponatremiaStrophanthidinDysprosiumPurkinje FibersHypernatremiaPhotometrySodium ChannelsBiological Transport, ActiveOsmolar ConcentrationAmilorideMembrane PotentialsLithiumRubidiumWater-Electrolyte BalanceSodium ChlorideAnuraThirstInappropriate ADH SyndromeVeratrineCalciumIntracellular FluidTetrodotoxinVeratridineSodium-Hydrogen AntiporterSodium, DietaryIon ChannelsExtracellular SpaceBenzofuransMonensinSaline Solution, HypertonicDehydrationBufo bufoOpossumsSheepCardanolidesEthers, CyclicMagnetic Resonance SpectroscopyWater IntoxicationMyocardial ContractionHydrogen-Ion ConcentrationSodium Channel BlockersHeart Conduction SystemPerfusionBiological TransportCell Membrane PermeabilitySweatHemodialysis SolutionsWater-Electrolyte ImbalanceElectrolytesSodium-Calcium ExchangerChloridesMyocardiumTime FactorsAction PotentialsDialysis SolutionsDogsHeartDrinkingNatriuresisAcetanilidesCardiac Complexes, PrematurePapillary MusclesRehydration SolutionsKineticsVasopressinsSodium RadioisotopesFluid TherapyDiuresisGuinea PigsLidocaineElectrophysiologyBody WaterAmishMagnesiumHemodiafiltrationIon TransportMicroelectrodesReceptors, VasopressinMannitolAldosteroneHypertensionHypertonic SolutionsFurosemideFluorescent DyesCell MembraneDiet, Sodium-RestrictedEthacrynic AcidRats, Inbred StrainsSkin Physiological PhenomenaNorepinephrineKidney Tubules, ProximalSerum Albumin, Radio-IodinatedWater