PhenotypeMyocytes, CardiacMyocardiumCells, CulturedHeartAnimals, NewbornCardiomegalyMyocardial ContractionMutationRats, Sprague-DawleyCell DifferentiationHeart VentriclesSignal TransductionRats, WistarMice, TransgenicCalciumMice, Inbred C57BLMitochondria, HeartApoptosisMolecular Sequence DataCell SizeEmbryonic Stem CellsMice, KnockoutSarcomeresMyocardial Reperfusion InjuryCardiotonic AgentsRNA, MessengerGATA4 Transcription FactorDisease Models, AnimalCalcium Channels, L-TypeGene Expression RegulationGene ExpressionCell LineHypertrophyIsoproterenolBase SequenceTime FactorsConnexin 43Reverse Transcriptase Polymerase Chain ReactionMuscle CellsBlotting, WesternCalcium SignalingMuscle ProteinsImmunohistochemistryCell SurvivalCardiomyopathiesSarcoplasmic Reticulum Calcium-Transporting ATPasesCardiac MyosinsSarcolemmaMicroscopy, ConfocalTranscription FactorsSodium-Calcium ExchangerPhosphorylationStem CellsVentricular MyosinsMyoblasts, CardiacGene Expression Regulation, DevelopmentalMyocardial IschemiaAmino Acid SequenceReactive Oxygen SpeciesVentricular RemodelingGenotypeAdrenergic beta-AgonistsInduced Pluripotent Stem CellsCardiomyopathy, DilatedSarcoplasmic ReticulumCell HypoxiaEnzyme ActivationHeart FailureRegenerationCell ProliferationTransfectionFibroblastsAtrial Natriuretic FactorPatch-Clamp TechniquesAdenoviridaeExcitation Contraction CouplingUp-RegulationMyocardial InfarctionGene Expression ProfilingCell Culture TechniquesOxidative StressGene DeletionEnzyme InhibitorsModels, AnimalPhenylephrineMyosin Heavy ChainsCytoprotectionDose-Response Relationship, DrugMembrane Potential, MitochondrialAllelesModels, BiologicalCell SeparationMyofibrilsAction PotentialsHeart AtriaGreen Fluorescent ProteinsL-Lactate DehydrogenaseCaspase 3Membrane Proteins