Sarcoplasmic ReticulumSarcoplasmic Reticulum Calcium-Transporting ATPasesCalcium-Transporting ATPasesCalciumRyanodine Receptor Calcium Release ChannelProtonsRyanodineRabbitsCaffeineCalcium-Binding ProteinsCalcium SignalingEndoplasmic ReticulumCalsequestrinMyocardiumMyocardial ContractionCalcium ChannelsMyocytes, CardiacMusclesThapsigarginMuscle ProteinsKineticsTetracaineAdenosine TriphosphateSodium-Calcium ExchangerEgtazic AcidCalcium Channels, L-TypeHeart VentriclesAdenosine TriphosphatasesCa(2+) Mg(2+)-ATPaseHeartMuscle Fibers, SkeletalMuscle, SkeletalMuscle ContractionProton PumpsDogsPhosphorylationMembrane PotentialsArrhythmias, CardiacAction PotentialsIsoproterenolMagnesiumRuthenium RedDantroleneHeart FailureMicrosomesBiological Transport, ActiveElectric StimulationProton-Translocating ATPasesTime FactorsHydrogen-Ion ConcentrationIntracellular MembranesExcitation Contraction CouplingSarcolemmaDose-Response Relationship, DrugDiastoleBiological TransportTerpenesMolecular Sequence DataOxalatesAmino Acid SequenceVacuolar Proton-Translocating ATPasesCalcium, DietaryProcaineMyofibrilsInositol 1,4,5-Trisphosphate ReceptorsCytosolCells, CulturedCalcium RadioisotopesProtein ConformationProtein BindingIndolesBinding SitesCalcium ChlorideMicroscopy, ElectronCell MembraneMalignant HyperthermiaModels, BiologicalMembrane ProteinsBuffersHomeostasisIon TransportPotassiumEnzyme InhibitorsPatch-Clamp TechniquesFluorescent DyesCalcium Channel BlockersVanadatesCalcimycinProton Pump InhibitorsMicroscopy, ConfocalRats, Sprague-DawleyEndoplasmic Reticulum StressCalcium IsotopesAdenosine DiphosphateVanadiumHydrolysisRats, WistarElectrophysiologyMutationXanthenes