PhenotypeMyocytes, CardiacJervell-Lange Nielsen SyndromeMyocardiumHeartCardiomegalyCardiomyopathiesAmyloid Neuropathies, FamilialMice, TransgenicCardiomyopathy, HypertrophicCardiomyopathy, DilatedMyocardial ContractionArrhythmias, CardiacGATA4 Transcription FactorMutationHeart Defects, CongenitalEchocardiographyHeart DiseasesCardiac OutputMice, KnockoutFibrosisMyosin Heavy ChainsDisease Models, AnimalElectrocardiographyVentricular RemodelingHeart VentriclesHypertrophy, Left VentricularMice, Inbred C57BLCardiac Surgical ProceduresHeart FailureDeath, Sudden, CardiacGenotypeVentricular Function, LeftCells, CulturedGene Expression RegulationHeart RateSignal TransductionCell DifferentiationPedigreeRNA, MessengerOrgan SizeCalciumCardiac TamponadeCardiac Pacing, ArtificialCardiac CatheterizationHeart ArrestTime FactorsMolecular Sequence DataMyoblasts, CardiacCardiac MyosinsCardiac Imaging TechniquesCardiac GlycosidesCardiac Output, LowHemodynamicsOut-of-Hospital Cardiac ArrestBase SequenceMyocardial InfarctionHeart TransplantationCardiac VolumeTroponin IAmino Acid SequenceDogsBlood PressureStroke VolumeTroponin THeart Function TestsRats, Sprague-DawleyHeart Conduction SystemCardiac Resynchronization TherapyTreatment OutcomeHeart NeoplasmsCardiopulmonary ResuscitationGene ExpressionCardiac Care FacilitiesTranscription FactorsVentricular Dysfunction, LeftCardiotonic AgentsAllelesGene Expression Regulation, DevelopmentalMyocardial IschemiaModels, CardiovascularCardiac ElectrophysiologyBiological MarkersFetal HeartGene DeletionHeart AtriaImmunohistochemistryAnimals, NewbornCell LineProspective StudiesReverse Transcriptase Polymerase Chain ReactionMuscle ProteinsVentricular FunctionRisk FactorsFibroblastsBlotting, WesternHeart InjuriesFollow-Up StudiesChromosome MappingCardiopulmonary Bypass