Myoblasts, SkeletalMyoblastsMuscle, SkeletalMuscle DevelopmentCell TransplantationMyoblasts, CardiacMyoD ProteinCell DifferentiationMusclesCardiomyoplastyMyogeninCell LineCells, CulturedMyogenic Regulatory Factor 5Muscle Fibers, SkeletalCell FusionStem Cell TransplantationConnexin 43Myocardial InfarctionMuscle ProteinsMyocytes, CardiacTransplantation, AutologousMyocardiumCoculture TechniquesTransfectionVentricular Function, LeftCreatine KinaseRNA, MessengerNeovascularization, PhysiologicMyocardial IschemiaCell SurvivalGene Expression RegulationSignal TransductionGenetic TherapyMolecular Sequence DataHeart FailureTime FactorsBase SequenceImmunohistochemistry