MyoblastsMyoblasts, SkeletalMyocytes, CardiacMyoblasts, CardiacCardiac OutputMuscle DevelopmentHeartMusclesArrhythmias, CardiacMuscle, SkeletalCardiac Surgical ProceduresMyoD ProteinCell DifferentiationDeath, Sudden, CardiacMyogeninCell FusionMuscle Fibers, SkeletalCells, CulturedMuscle ProteinsMyocardiumCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialCell LineHeart DiseasesMyocardial ContractionCardiac CatheterizationHeart VentriclesHeart ArrestTime FactorsMuscle CellsHeart FailureSatellite Cells, Skeletal MuscleCardiomyopathiesCardiac MyosinsCardiac Imaging TechniquesElectrocardiographyMyosin Heavy ChainsMyocardial InfarctionEchocardiographyRegenerationMyogenic Regulatory FactorsCardiac GlycosidesHeart RateChick EmbryoVentricular RemodelingCardiac Output, LowDesminVentricular Function, LeftRNA, MessengerCreatine KinaseOut-of-Hospital Cardiac ArrestHemodynamicsCardiac VolumeHeart TransplantationSignal TransductionQuailMuscular Dystrophy, FacioscapulohumeralGene Expression RegulationTroponin ICell TransplantationPAX7 Transcription FactorTroponin TCalciumHeart Defects, CongenitalStroke VolumeMyogenic Regulatory Factor 5Gene Expression Regulation, DevelopmentalMyosinsTransfectionDogsCardiomyopathy, DilatedMyocardial IschemiaBlood PressureCardiac Resynchronization TherapyHeart Function TestsMice, Inbred C57BLVentricular Dysfunction, LeftRats, Sprague-DawleyFibrosisHeart Conduction SystemMyofibrilsCardiopulmonary ResuscitationDisease Models, AnimalHeart NeoplasmsCardiac Care FacilitiesMolecular Sequence DataGene ExpressionMice, TransgenicCardiotonic AgentsTranscription FactorsTreatment OutcomeCardiac ElectrophysiologySarcomeresMEF2 Transcription FactorsMice, KnockoutMice, Inbred mdxModels, CardiovascularBase SequenceFetal Heart