OuabainSodium-Potassium-Exchanging ATPaseSodiumPotassiumCardiac GlycosidesBiological Transport, ActiveDigoxinRubidiumDigitoxinRubidium RadioisotopesSodium IsotopesStrophanthinsCardiotonic AgentsDigitalis GlycosidesSaponinsBufanolidesEthacrynic AcidLithiumCalciumCardanolidesGuinea PigsPotassium IsotopesMembrane PotentialsAmilorideEnzyme InhibitorsGuanabenzBumetanideAdenosine TriphosphatasesFurosemideBiological Transport