Myocytes, CardiacSarcomeresMyocardiumConnectinHeartMyofibrilsHeart VentriclesCardiac MyosinsMyocardial ContractionMuscle ProteinsMuscle, StriatedCardiac OutputCardiomegalyMyosin Heavy ChainsActininCalciumArrhythmias, CardiacCells, CulturedMuscle CellsCardiomyopathy, Hypertrophic, FamilialMyosinsCardiac Surgical ProceduresVentricular MyosinsCardiomyopathy, HypertrophicDeath, Sudden, CardiacTroponin ICardiomyopathiesCreatine Kinase, Mitochondrial FormVentricular FunctionAnimals, NewbornMuscle, SkeletalRats, Sprague-DawleyTroponin TActin CytoskeletonMuscle Fibers, SkeletalTropomyosinCalcium Channels, L-TypeHeart DiseasesActinsCardiomyopathy, DilatedCalcium SignalingCardiac Pacing, ArtificialHeart AtriaHeart FailureMyopathies, NemalineTime FactorsPatch-Clamp TechniquesSodium-Calcium ExchangerIsoproterenolTropomodulinGuinea PigsMuscle DevelopmentCardiac TamponadeAction PotentialsRabbitsRats, WistarSarcoplasmic ReticulumMyosin Light ChainsSarcolemmaMusclesCardiac CatheterizationCell SizeRNA, MessengerPotassium ChannelsVentricular RemodelingMembrane PotentialsMice, TransgenicAtrial Natriuretic FactorEchocardiographyCreatine KinaseHeart ArrestAdrenergic beta-AgonistsVentricular Function, LeftMolecular Sequence DataMutationCardiotonic AgentsModels, CardiovascularProtein IsoformsMyoblasts, CardiacDisease Models, AnimalElectrocardiographyDogsCofilin 2Signal TransductionTroponinCell DifferentiationMyocardial InfarctionCarrier ProteinsGATA4 Transcription FactorCardiac Output, LowHeart RateCardiac GlycosidesPhosphorylationElectrophysiologyGene Expression RegulationSarcoplasmic Reticulum Calcium-Transporting ATPasesChick EmbryoMicroscopy, ConfocalMice, KnockoutRyanodine Receptor Calcium Release Channel