Cardiac GlycosidesGlycosidesDigitoxinCardenolidesOuabainDigoxinInsectsSodium-Potassium-Exchanging ATPaseDigitalis GlycosidesDigitoxigeninDigitalisBufanolidesCardanolidesStrophanthidinRubidiumNeriumProscillaridinCardiotonic AgentsMyocytes, CardiacStrophanthinsHeartGlycoside HydrolasesSodiumInsect ProteinsPlant PoisoningPotassiumMyocardial ContractionMyocardiumVeratrineDigoxigeninSaponinsCardiac OutputAntiarisTopoisomerase InhibitorsDeslanosideRubidium RadioisotopesPlant ExtractsGuinea PigsErythrosinePapillary MusclesMolecular Sequence DataArrhythmias, CardiacCardiac Surgical ProceduresDogsMolecular StructureDeath, Sudden, CardiacIridoid GlycosidesHeart VentriclesReceptors, DrugTime FactorsSodium-Calcium ExchangerInsect VirusesCalciumBiological Transport, Active