Sarcoplasmic ReticulumMuscle, SmoothCalcium-Transporting ATPasesCalciumMuscle, Smooth, VascularSarcoplasmic Reticulum Calcium-Transporting ATPasesMusclesMyocytes, Smooth MuscleRabbitsEndoplasmic ReticulumMyocytes, CardiacRyanodine Receptor Calcium Release ChannelCaffeineMuscle ProteinsMuscle ContractionMyocardiumRyanodineCalsequestrinMuscle, SkeletalCalcium-Binding ProteinsMuscle Fibers, SkeletalMyocardial ContractionCalcium SignalingCells, CulturedCalcium ChannelsHeart VentriclesAdenosine TriphosphateKineticsCa(2+) Mg(2+)-ATPaseSodium-Calcium ExchangerCalcium Channels, L-TypeHeartSarcolemmaRuthenium RedMembrane PotentialsMuscle CellsGuinea PigsMuscle DevelopmentDogsMyofibrilsEgtazic AcidThapsigarginMagnesiumExcitation Contraction CouplingRats, Sprague-DawleyMuscle Fibers, Fast-TwitchPhosphorylationAdenosine TriphosphatasesAortaTetracaineMicrosomesMuscle RelaxationTime FactorsPapillary MusclesProcaineRats, WistarMitochondria, MuscleMicroscopy, ElectronPatch-Clamp TechniquesIsoproterenolIntracellular MembranesMuscle FatigueDantroleneAction PotentialsPotassiumBiological Transport, ActiveElectric StimulationMuscle Fibers, Slow-TwitchTracheaDose-Response Relationship, DrugEnzyme InhibitorsRNA, MessengerOxalatesCalcium Channel BlockersVentricular FunctionMalignant HyperthermiaIndolesPotassium ChlorideMolecular Sequence DataIsometric ContractionElectrophysiologyFluorescent DyesSignal TransductionMuscle DenervationSmooth Muscle MyosinsAdrenergic beta-AgonistsMicroscopy, ConfocalAmino Acid SequenceHydrogen-Ion ConcentrationModels, BiologicalMuscle, StriatedMembrane ProteinsActinsBiological TransportBinding SitesEndoplasmic Reticulum StressCytosolSodiumMyosin Heavy ChainsProtein Binding