Myocardial ContractionMyocytes, CardiacReceptors, Adrenergic, beta-1Muscle ContractionSarcoplasmic ReticulumCalcium SignalingCalciumMyocardiumIsometric ContractionUterine ContractionMuscle, SmoothMuscle, SkeletalElectric StimulationIsotonic ContractionMEF2 Transcription FactorsMuscle CellsGuinea PigsVasoconstrictionMyogenic Regulatory FactorsHeartHeart VentriclesCardiomegalyMuscle, Smooth, VascularRats, Sprague-DawleyMuscle RelaxationMuscle FatigueElectromyographyMusclesCells, CulturedRabbitsPotassium ChlorideDose-Response Relationship, DrugSarcomeresPhenylephrineNorepinephrineGastrointestinal MotilityVasoconstrictor AgentsRats, WistarTime FactorsTracheaUrinary BladderDogsAcetylcholinePeristalsisMuscle Fibers, SkeletalVentricular FunctionIsoproterenolCell SizeNifedipineAtropineExcitation Contraction CouplingVas DeferensCarbacholMyosin Light ChainsIleumMyosinsAction PotentialsCaffeineAorta, ThoracicMuscle TonusCalcium Channel Blockersrho-Associated KinasesMyofibrilsEnzyme InhibitorsTorque15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidPotassiumEndothelin-1Calcium Channels, L-TypeMyosin Heavy ChainsSignal TransductionMuscle ProteinsMotor NeuronsSerotoninAdrenergic alpha-AgonistsVerapamilMyometriumMesenteric ArteriesAdenosine TriphosphateMembrane PotentialsSarcoplasmic Reticulum Calcium-Transporting ATPasesVentricular RemodelingBiomechanical PhenomenaModels, CardiovascularPapillary MusclesStress, MechanicalPressurePhosphorylationCatsCardiomyopathiesEndothelinsPrazosinHypertrophyHistamineAnimals, NewbornReceptors, Adrenergic, alpha-1MyographyActinsIndolesSarcolemma