Myocytes, CardiacCell ProliferationHeartCyclin D2MyocardiumRegenerationHeart InjuriesAnimals, NewbornFetal HeartTissue Inhibitor of Metalloproteinase-3Cells, CulturedGene Expression Regulation, DevelopmentalSignal TransductionPericardiumMice, TransgenicSOXF Transcription FactorsHeart VentriclesHeart Defects, CongenitalZebrafishCell CycleMice, KnockoutRats, Sprague-DawleyCell DivisionCyclin-Dependent Kinase Inhibitor p27CardiomegalyEmbryo, MammalianMice, Inbred C57BLBlotting, WesternAnimals, Genetically ModifiedMyocardial InfarctionHomeodomain ProteinsTranscription FactorsCardiac OutputApoptosisMyocardial ContractionArrhythmias, CardiacCell DifferentiationCardiac Surgical ProceduresVentricular RemodelingDeath, Sudden, CardiacTime FactorsCardiomyopathiesHeart DiseasesRNA, MessengerDisease Models, AnimalCell SurvivalHypertrophyHeart FailureGene Expression RegulationMyoblasts, CardiacPhosphorylationImmunohistochemistryGATA4 Transcription FactorFibrosisCell Line, TumorCardiac MyosinsReverse Transcriptase Polymerase Chain ReactionCell SizeRats, WistarCell LineCalciumStem CellsCardiac Pacing, ArtificialCardiotonic AgentsGene ExpressionCardiac TamponadeMitochondria, HeartDose-Response Relationship, DrugProto-Oncogene Proteins c-aktEchocardiographyCell EnlargementMyocardial Reperfusion InjuryCell MovementBromodeoxyuridineFibroblastsCardiac CatheterizationIn Situ Nick-End LabelingUp-RegulationSarcoplasmic Reticulum Calcium-Transporting ATPasesSarcomeresVentricular MyosinsVentricular Function, LeftLymphocyte ActivationTransfectionMyocardial IschemiaHemodynamicsEnzyme ActivationHeart ArrestMuscle CellsCardiomyopathy, DilatedEnzyme InhibitorsAtrial Natriuretic FactorDown-RegulationHeart RateRNA, Small InterferingKi-67 AntigenFlow CytometryTroponin IPhenotypeElectrocardiography