MusclesMyocytes, CardiacMuscle ProteinsMuscle, SmoothMyocytes, Smooth MuscleMyocardiumMuscle, SkeletalHeartSurvival RateCell SurvivalCells, CulturedMuscle Fibers, SkeletalMuscle CellsMuscle ContractionMuscle DevelopmentMuscle, Smooth, VascularTime FactorsCalciumCardiac OutputRats, Sprague-DawleyArrhythmias, CardiacMyocardial ContractionDisease-Free SurvivalSignal TransductionHeart VentriclesAortaMyoblasts, CardiacRNA, MessengerMuscle Fibers, Fast-TwitchMuscle DenervationMuscle FatigueSurvivalMuscle Fibers, Slow-TwitchCardiomegalySurvival AnalysisCardiac Surgical ProceduresMitochondria, MuscleMyofibrilsRabbitsCell DifferentiationGraft SurvivalRats, WistarDeath, Sudden, CardiacAnimals, NewbornMembrane PotentialsImmunohistochemistryGene Expression RegulationMuscle RelaxationPapillary MusclesTreatment OutcomeModels, CardiovascularGuinea PigsMice, Inbred C57BLMuscle, StriatedApoptosisNeck MusclesDose-Response Relationship, DrugOculomotor MusclesSarcolemmaHeart DiseasesDisease Models, AnimalSarcomeresPhosphorylationMuscle SpindlesCell LineCell DivisionAction PotentialsBlotting, WesternDogsMice, KnockoutRespiratory MusclesCell ProliferationCardiomyopathiesGene ExpressionMuscle WeaknessVentricular FunctionActinsElectric StimulationMice, TransgenicCardiac Pacing, ArtificialKineticsModels, BiologicalElectrophysiologyEnzyme InhibitorsReverse Transcriptase Polymerase Chain ReactionMyosin Heavy ChainsRetrospective StudiesHeart FailureChick EmbryoCalcium SignalingAbdominal MusclesQuadriceps MuscleMolecular Sequence DataAngiotensin IIAorta, ThoracicIsometric ContractionMitochondria, HeartEnzyme ActivationCardiac TamponadePhenotype