Myocytes, CardiacSubstrate SpecificityMyocardiumCells, CulturedKineticsHeartAnimals, NewbornCardiomegalyMolecular Sequence DataMyocardial ContractionAmino Acid SequenceRats, Sprague-DawleyHeart VentriclesRats, WistarCalciumBinding SitesPhosphorylationSignal TransductionMitochondria, HeartCatalysisProtein BindingModels, MolecularEnzyme ActivationMyocardial Reperfusion InjuryCell SizeRecombinant ProteinsCardiotonic AgentsSarcomeresCell LineApoptosisEmbryonic Stem CellsCell DifferentiationHydrolysisTime FactorsHydrogen-Ion ConcentrationGATA4 Transcription FactorBase SequenceEnzyme InhibitorsEscherichia coliIsoproterenolCalcium Channels, L-TypeCatalytic DomainAdenosine TriphosphateMice, TransgenicMutationHypertrophyProtein Structure, TertiaryMuscle CellsConnexin 43Oxidation-ReductionCalcium SignalingBlotting, WesternSarcolemmaRNA, MessengerCrystallography, X-RayMuscle ProteinsSarcoplasmic Reticulum Calcium-Transporting ATPasesProtein ConformationCardiomyopathiesCardiac MyosinsMyocardial IschemiaMutagenesis, Site-DirectedSodium-Calcium ExchangerMice, Inbred C57BLMicroscopy, ConfocalSequence Homology, Amino AcidDose-Response Relationship, DrugMyoblasts, CardiacGene ExpressionIsoenzymesModels, BiologicalCell SurvivalAdrenergic beta-AgonistsSarcoplasmic ReticulumVentricular RemodelingStructure-Activity RelationshipReactive Oxygen SpeciesVentricular MyosinsMice, KnockoutHeart FailureGene Expression RegulationGlucoseTransfectionInduced Pluripotent Stem CellsCardiomyopathy, DilatedCell HypoxiaL-Lactate DehydrogenaseAtrial Natriuretic FactorDisease Models, AnimalCaspase 3Reverse Transcriptase Polymerase Chain ReactionCarrier ProteinsPatch-Clamp TechniquesHydrogen PeroxideCytosolProtein Kinase CMyocardial InfarctionExcitation Contraction CouplingCloning, MolecularRegeneration