Sarcoplasmic ReticulumSarcoplasmic Reticulum Calcium-Transporting ATPasesCalcium-Transporting ATPasesCalciumRyanodine Receptor Calcium Release ChannelRyanodineCaffeineRabbitsCalcium-Binding ProteinsCalcium SignalingEndoplasmic ReticulumCalsequestrinMyocardiumMyocardial ContractionCalcium ChannelsMyocytes, CardiacMusclesThapsigarginMuscle ProteinsTetracaineSodium-Calcium ExchangerCalcium Channels, L-TypeAdenosine TriphosphateKineticsEgtazic AcidHeart VentriclesAdenosine TriphosphatasesHeartCa(2+) Mg(2+)-ATPaseMuscle Fibers, SkeletalMuscle ContractionMuscle, SkeletalDogsPhosphorylationMembrane PotentialsArrhythmias, CardiacIsoproterenolAction PotentialsRuthenium RedDantroleneMagnesiumHeart FailureMicrosomesElectric StimulationBiological Transport, ActiveTime FactorsExcitation Contraction CouplingProton-Translocating ATPasesIntracellular MembranesSarcolemmaDiastoleDose-Response Relationship, DrugTerpenesOxalatesCalcium, DietaryBiological TransportProcaineMyofibrilsMolecular Sequence DataInositol 1,4,5-Trisphosphate ReceptorsCalcium RadioisotopesAmino Acid SequenceCytosolCells, CulturedIndolesCalcium ChlorideMicroscopy, ElectronMalignant HyperthermiaProtein BindingVacuolar Proton-Translocating ATPasesHydrogen-Ion ConcentrationHomeostasisMembrane ProteinsCalcium Channel BlockersBuffersCell MembraneModels, BiologicalBinding SitesEnzyme InhibitorsPatch-Clamp TechniquesFluorescent DyesVanadatesProtein ConformationPotassiumCalcimycinEndoplasmic Reticulum StressCalcium IsotopesMicroscopy, ConfocalRats, Sprague-DawleyIon TransportVanadiumAdenosine DiphosphateRats, WistarXanthenesCalcium Channel AgonistsElectrophysiologyMurexideHydrolysisAequorinCalcium Carbonate