Sarcoplasmic ReticulumCalcium-Transporting ATPasesMyocardiumCalcium-Binding ProteinsCalciumSarcoplasmic Reticulum Calcium-Transporting ATPasesRyanodine Receptor Calcium Release ChannelRyanodineDogsCalcium ChannelsCalsequestrinCa(2+) Mg(2+)-ATPaseRabbitsCaffeineRuthenium RedMicrosomesHeartEndoplasmic ReticulumOxalatesAdenosine TriphosphatasesKineticsAdenosine TriphosphateCalcium SignalingMyocardial ContractionMyocytes, CardiacMusclesMuscle ProteinsCalmodulinMersalylBiological Transport, ActiveMagnesiumHeart VentriclesEgtazic AcidPhosphorylationLipid BilayersMuscle, SkeletalIon Channel GatingMembrane PotentialsSheepIntracellular MembranesBiological TransportProtein KinasesHydrogen-Ion ConcentrationCalcium Channels, L-TypeElectric ConductivityIsoproterenolDose-Response Relationship, DrugTime FactorsSodium-Calcium ExchangerElectrophoresis, Polyacrylamide GelThapsigarginBiophysical PhenomenaMolecular WeightProtein BindingMuscle ContractionSarcolemmaExcitation Contraction CouplingCyclic AMP-Dependent Protein KinasesAmino Acid SequenceMolecular Sequence DataCalcium-Calmodulin-Dependent Protein KinasesPeptide FragmentsTetracaineMyofibrilsArrhythmias, CardiacDantroleneMuscle Fibers, SkeletalCyclic AMPProcaineCalcium, DietaryCalcium RadioisotopesCalcium ChlorideMalignant HyperthermiaMicroscopy, ElectronCardiac OutputCardiomegalyCells, CulturedFluorescent DyesEndoplasmic Reticulum StressCalcium IsotopesPotassiumCalcium Channel AgonistsXanthenesPapillary MusclesBinding SitesCytosolHeart FailureIndolesMurexideVentricular FunctionRats, Sprague-DawleyPatch-Clamp TechniquesAequorinIon TransportVanadiumAction PotentialsRats, WistarCalcium CarbonateStrontiumMembrane Proteins