MusclesCell LineageMuscle DevelopmentMuscle, SkeletalMuscle ProteinsUrochordataMyoD ProteinHeartMyogenic Regulatory FactorsMyocardiumMEF2 Transcription FactorsMyocytes, CardiacMuscle, SmoothGene Expression Regulation, DevelopmentalCell DifferentiationMuscle Fibers, SkeletalPapillary MusclesMuscle, Smooth, VascularMuscle ContractionMyocardial ContractionTranscription FactorsMolecular Sequence DataCells, CulturedCardiac OutputBase SequencePaired Box Transcription FactorsActinsMice, TransgenicIn Situ HybridizationMyofibrilsSarcomeresMuscle Fibers, Fast-TwitchCalciumMuscle Fibers, Slow-TwitchChick EmbryoDNA-Binding ProteinsArrhythmias, CardiacMuscle FatigueHeart VentriclesMuscle DenervationStem CellsMitochondria, MuscleRabbitsTroponin CMyocytes, Smooth MuscleCardiac Surgical ProceduresHomeodomain ProteinsTime FactorsTroponinMuscle CellsCardiomegalyDeath, Sudden, CardiacTroponin IMuscle RelaxationNeck MusclesOculomotor MusclesMuscle, StriatedIsometric ContractionMyosin Heavy ChainsCardiac MyosinsSarcoplasmic ReticulumRats, Sprague-DawleyMuscle SpindlesSarcolemmaDogsRespiratory MusclesCardiomyopathiesMuscle WeaknessRyanodine Receptor Calcium Release ChannelRNA, MessengerHeart DiseasesTropomyosinMuscular DiseasesPhylogenyMyosinsAbdominal MusclesDystrophinMice, Inbred C57BLCardiac Pacing, ArtificialQuadriceps MuscleRats, WistarTroponin TGuinea PigsConnectinModels, CardiovascularMyoblasts, CardiacGene Expression RegulationElectric StimulationCreatine KinaseCardiac TamponadeMasseter MuscleAmino Acid SequenceKineticsSignal TransductionHeart RateHeart FailureFacial MusclesMasticatory MusclesVentricular FunctionChickens