Myocytes, CardiacMusclesMyocardiumMuscle ProteinsHeartMuscle, SkeletalMyocardial ContractionMuscle, SmoothMuscle Fibers, SkeletalPapillary MusclesMuscle ContractionMuscle, Smooth, VascularMuscle DevelopmentCells, CulturedCardiomegalyCalciumSarcomeresHeart VentriclesMyofibrilsCardiac OutputRats, Sprague-DawleyAnimals, NewbornArrhythmias, CardiacMuscle CellsMuscle Fibers, Fast-TwitchRats, WistarMuscle Fibers, Slow-TwitchTime FactorsRabbitsCardiac MyosinsMuscle FatigueSarcolemmaSarcoplasmic ReticulumTroponin IMuscle DenervationCardiomyopathiesTroponin CMitochondria, MuscleMyocytes, Smooth MuscleTroponinMyosin Heavy ChainsCardiac Surgical ProceduresIsoproterenolRyanodine Receptor Calcium Release ChannelDeath, Sudden, CardiacMitochondria, HeartMyoblasts, CardiacHeart DiseasesCardiotonic AgentsMice, TransgenicSignal TransductionRNA, MessengerHeart FailureCell DifferentiationDogsMuscle RelaxationIsometric ContractionNeck MusclesOculomotor MusclesMuscle, StriatedMice, Inbred C57BLConnectinAction PotentialsCalcium SignalingModels, CardiovascularMuscle SpindlesTroponin TGene Expression RegulationGATA4 Transcription FactorHypertrophyActinsVentricular FunctionRespiratory MusclesDystrophinTropomyosinDisease Models, AnimalGuinea PigsCalcium Channels, L-TypeHeart AtriaMuscle WeaknessPhosphorylationCreatine KinaseCardiomyopathy, DilatedMyosinsVentricular RemodelingCardiac Pacing, ArtificialMice, KnockoutElectric StimulationDesminMolecular Sequence DataRegenerationMyocardial InfarctionKineticsMuscular DiseasesMembrane PotentialsMyocardial IschemiaHeart RateGene ExpressionAbdominal MusclesMyocardial Reperfusion Injury