Myocytes, CardiacMyocardiumCardiomegalyHeartCells, CulturedAnimals, NewbornMyocardial ContractionMolecular WeightRats, Sprague-DawleyChromatography, AffinityElectrophoresis, Polyacrylamide GelHeart VentriclesChromatography, Ion ExchangeChromatography, GelGATA4 Transcription FactorHypertrophyMitochondria, HeartApoptosisVentricular RemodelingRats, WistarCalciumCell SizeSignal TransductionMyocardial Reperfusion InjuryMolecular Sequence DataKineticsSarcomeresCardiotonic AgentsCardiomyopathiesSubstrate SpecificityMice, TransgenicAmino Acid SequenceChromatographySarcoplasmic Reticulum Calcium-Transporting ATPasesEmbryonic Stem CellsCell DifferentiationVentricular MyosinsMuscle CellsHydrogen-Ion ConcentrationCell EnlargementHeart FailureCalcium SignalingIsoproterenolBlotting, WesternChromatography, DEAE-CelluloseMyoblasts, CardiacMice, Inbred C57BLCardiac MyosinsAmino AcidsMyocardial IschemiaAtrial Natriuretic FactorMuscle ProteinsConnexin 43Enzyme ActivationPhosphorylationMyocardial InfarctionDisease Models, AnimalFibrosisGene ExpressionMice, KnockoutGene Expression RegulationCell SurvivalTime FactorsExcitation Contraction CouplingCell LinePhenylephrineRegenerationIsoelectric PointCardiomyopathy, DilatedRecombinant ProteinsRNA, MessengerSodium-Calcium ExchangerReactive Oxygen SpeciesMyosin Heavy ChainsSarcolemmaCalcium Channels, L-TypeAdenoviridaeIn Situ Nick-End LabelingBase SequenceHeart InjuriesEscherichia coliCaspase 3Isoelectric FocusingEndothelin-1Chromatography, High Pressure LiquidSarcoplasmic ReticulumCloning, MolecularOxidative StressAdrenergic beta-AgonistsEnzyme InhibitorsReverse Transcriptase Polymerase Chain ReactionStem CellsHeart DiseasesAngiotensin IICalcineurinCrystallizationRabbitsCell HypoxiaModels, AnimalHydroxyapatites