HeartMyocardiumMyocytes, CardiacMyocardial ContractionCardiomegalyHeart VentriclesVentricular Function, LeftGATA4 Transcription FactorDisease Models, AnimalCardiac OutputAtrial Natriuretic FactorCardiac ElectrophysiologyMyosin Heavy ChainsArrhythmias, CardiacCardiac Surgical ProceduresDeath, Sudden, CardiacGene Expression RegulationGene Transfer TechniquesHeart FailureVentricular MyosinsCardiomyopathiesGene ExpressionVentricular RemodelingGenetic VectorsEpimediumSarcoplasmic Reticulum Calcium-Transporting ATPasesT-Box Domain ProteinsGene Expression Regulation, DevelopmentalTranscription FactorsSerum Response FactorCardiac TamponadeCardiac Pacing, ArtificialAnimals, NewbornCells, CulturedEchocardiographyHemodynamicsHeart DiseasesSarcomeresDependovirusGenetic TherapyRNA, MessengerGene Expression ProfilingCardiac CatheterizationTime FactorsRats, Sprague-DawleySignal TransductionMyocardial InfarctionHeart ArrestHypertrophy, Left VentricularMuscle ProteinsMice, TransgenicHomeodomain ProteinsMEF2 Transcription FactorsMice, Inbred C57BLCalcineurinPromoter Regions, GeneticTranscription, GeneticMyoblasts, CardiacMyogenic Regulatory FactorsAdenoviridaeCell DifferentiationMyosinsTransgenesCardiac MyosinsNuclear ProteinsCardiac Imaging TechniquesElectrocardiographyRats, WistarCardiac GlycosidesOligonucleotide Array Sequence AnalysisHeart RateReverse Transcriptase Polymerase Chain ReactionGenes, ReporterTranscriptional ActivationCardiac Output, LowOut-of-Hospital Cardiac ArrestActinsCardiac VolumeLuciferasesHeart TransplantationHistone DeacetylasesDNA-Binding ProteinsMice, KnockoutTroponin IRepressor ProteinsEmbryonic Stem CellsTrans-ActivatorsTransduction, GeneticHeart Defects, CongenitalPhenotypeXenopus ProteinsMolecular Sequence DataStroke VolumeBlood PressureCardiac Resynchronization TherapyAgingHeart Function TestsTroponin TStem CellsHeart Conduction System