MyocardiumMyocytes, CardiacHeartMyocardial ContractionHeart VentriclesMyocardial StunningCardiomegalyCells, CulturedMyocardial IschemiaMyocardial Reperfusion InjuryAnimals, NewbornMyocardial InfarctionRats, Sprague-DawleyCardiotonic AgentsRats, WistarMitochondria, HeartCalciumCardiomyopathiesVentricular RemodelingDogsCoronary CirculationSarcomeresCardiomyopathy, DilatedHeart FailureTime FactorsHeart AtriaSignal TransductionGATA4 Transcription FactorSarcolemmaDisease Models, AnimalConnexin 43Ventricular FunctionCardiac MyosinsMyocardial ReperfusionVentricular Function, LeftApoptosisCell DifferentiationMyoblasts, CardiacMice, TransgenicCell SizeIschemic Preconditioning, MyocardialEmbryonic Stem CellsPericardiumMuscle CellsAdrenergic beta-AgonistsCalcium Channels, L-TypeMyocarditisSarcoplasmic ReticulumEchocardiographySarcoplasmic Reticulum Calcium-Transporting ATPasesVentricular MyosinsHypertrophyMyofibrilsHemodynamicsSodium-Calcium ExchangerCoronary VesselsMuscle ProteinsArrhythmias, CardiacCalcium SignalingRNA, MessengerMice, Inbred C57BLRegenerationFibrosisIsoproterenolModels, CardiovascularAction PotentialsAtrial Natriuretic FactorTroponin IImmunohistochemistryFetal HeartVentricular Dysfunction, LeftHeart Conduction SystemBlotting, WesternModels, AnimalTissue SurvivalPhosphorylationRabbitsHeart DiseasesMice, KnockoutMyosin Heavy ChainsCell SurvivalCell HypoxiaReactive Oxygen SpeciesGene ExpressionStem CellsReceptors, Adrenergic, betaCreatine KinaseDose-Response Relationship, DrugGene Expression RegulationExcitation Contraction CouplingMicroscopy, ConfocalPerfusionAdenoviridaeStem Cell TransplantationEnzyme ActivationHeart InjuriesSwinePhenylephrineReverse Transcriptase Polymerase Chain ReactionL-Lactate Dehydrogenase