DigitalisDigitalis GlycosidesDigitoninDigitoxinDigoxinDigitoxigeninCardanolidesCardenolidesLanatosidesCardiac GlycosidesOuabainStrophanthinsSodium-Potassium-Exchanging ATPaseStrophanthidinDeslanosideCardiotonic AgentsPenstemonHeart FailureSaponinsArrhythmias, CardiacPlants, MedicinalCell Membrane PermeabilityAnti-Arrhythmia AgentsPlants, ToxicMethylphenazonium MethosulfateCell FractionationEnzyme ReactivatorsPurkinje FibersDetergentsMitochondria, LiverBufanolidesDogsDequaliniumKineticsDiureticsHeart BlockPhotophosphorylationTachycardiaApneaSqualene MonooxygenaseCell MembraneRubidiumIntracellular Membranes