Myocytes, CardiacCell DifferentiationStem CellsCells, CulturedMyocardiumCardiomegalyHeartSignal TransductionAnimals, NewbornEmbryonic Stem CellsMyocardial ContractionHematopoietic Stem CellsStem Cell TransplantationRats, Sprague-DawleyGene Expression Regulation, DevelopmentalMice, TransgenicApoptosisCell ProliferationGene Expression RegulationCell LineageCell LinePluripotent Stem CellsTranscription FactorsMice, Inbred C57BLRNA, MessengerAdult Stem CellsHeart VentriclesInduced Pluripotent Stem CellsGATA4 Transcription FactorMice, KnockoutPlant StemsReverse Transcriptase Polymerase Chain ReactionCell SizeMesenchymal Stromal CellsHypertrophyRats, WistarNeoplastic Stem CellsGene ExpressionCalciumTime FactorsImmunohistochemistryCell DivisionRegenerationCell SurvivalVentricular RemodelingMitochondria, HeartNeural Stem CellsBlotting, WesternPhenotypeMyocardial Reperfusion InjuryEmbryo, MammalianMultipotent Stem CellsHomeodomain ProteinsMuscle CellsSex DifferentiationMolecular Sequence DataSarcomeresDNA-Binding ProteinsPhosphorylationCell Culture TechniquesCardiotonic AgentsBase SequenceCell EnlargementCardiomyopathiesTretinoinTransfectionUp-RegulationSarcoplasmic Reticulum Calcium-Transporting ATPasesDisease Models, AnimalVentricular MyosinsMyoblasts, CardiacGene Expression ProfilingBone Marrow CellsModels, BiologicalFlow CytometryMuscle ProteinsCalcium SignalingStem Cell NicheCell SeparationConnexin 43Coculture TechniquesTranscription, GeneticEnzyme ActivationMesenchymal Stem Cell TransplantationAntigens, DifferentiationOsteogenesisDown-RegulationHeart FailurePromoter Regions, GeneticBiological MarkersMyosin Heavy ChainsHematopoietic Stem Cell TransplantationIsoproterenolCardiac MyosinsIn Situ Nick-End LabelingCell CycleMyocardial InfarctionFibrosisMyocardial IschemiaOsteoblasts