Myocytes, CardiacMyocardiumCells, CulturedHeartAnimals, NewbornCardiomegalyMyocardial ContractionRats, Sprague-DawleyHeart VentriclesRats, WistarCalciumMitochondria, HeartMyocardial Reperfusion InjuryCardiotonic AgentsSarcomeresEmbryonic Stem CellsCell SizeSignal TransductionGATA4 Transcription FactorCell DifferentiationCalcium Channels, L-TypeApoptosisIsoproterenolHypertrophyConnexin 43Muscle CellsMice, TransgenicCalcium SignalingSarcoplasmic Reticulum Calcium-Transporting ATPasesSarcolemmaCardiac MyosinsSodium-Calcium ExchangerCardiomyopathiesMyocardial IschemiaMyoblasts, CardiacMuscle ProteinsVentricular MyosinsVentricular RemodelingAdrenergic beta-AgonistsSarcoplasmic ReticulumHeart FailureTime FactorsMice, Inbred C57BLInduced Pluripotent Stem CellsReactive Oxygen SpeciesMicroscopy, ConfocalCardiomyopathy, DilatedCell HypoxiaAtrial Natriuretic FactorRNA, MessengerCell SurvivalExcitation Contraction CouplingMyocardial InfarctionRegenerationPhosphorylationEnzyme ActivationPatch-Clamp TechniquesGene Expression RegulationPhenylephrineAdenoviridaeDisease Models, AnimalBlotting, WesternMice, KnockoutCytoprotectionGene ExpressionCell LineMembrane Potential, MitochondrialStem CellsHeart AtriaReverse Transcriptase Polymerase Chain ReactionL-Lactate DehydrogenaseAction PotentialsEnzyme InhibitorsMyofibrilsAngiotensin IICaspase 3Endothelin-1Oxidative StressRyanodine Receptor Calcium Release ChannelDose-Response Relationship, DrugArrhythmias, CardiacDiacetylModels, AnimalImmunohistochemistryReceptors, Adrenergic, beta-1Hydrogen PeroxideMyosin Heavy ChainsUp-RegulationCell Culture TechniquesHeart DiseasesCell EnlargementTroponin IGap JunctionsIschemic Preconditioning, MyocardialIn Situ Nick-End LabelingReceptors, Adrenergic, betaFibrosisProtein Kinase CCalcineurinCell Separation