IsoproterenolAdrenergic beta-AgonistsReceptors, Adrenergic, betaPropranololCyclic AMPAdenylate CyclaseColforsinReceptors, AdrenergicSympathomimeticsMyocardiumMyocardial ContractionReceptors, Adrenergic, beta-2Parotid GlandAdrenergic beta-AntagonistsDihydroalprenololReceptors, Adrenergic, beta-1Cardiotonic AgentsPindololBucladesineIodocyanopindololEpinephrineAdrenergic AgonistsPropanolaminesNorepinephrineCyclic AMP-Dependent Protein KinasesAlprenololPhenylephrineCatecholaminesDogs8-Bromo Cyclic Adenosine MonophosphateMyocytes, CardiacStimulation, Chemical1-Methyl-3-isobutylxanthineAdrenergic alpha-AgonistsCalciumGTP-Binding Protein alpha Subunits, GsHeart RateAdrenergic beta-1 Receptor AgonistsHeart VentriclesDose-Response Relationship, DrugGuinea PigsPhentolamineCardiomegalyCarbacholLipolysisCells, CulturedRats, WistarReceptors, Adrenergic, beta-3Diphenylacetic AcidsReceptors, Adrenergic, alphaPapillary MusclesRats, Sprague-DawleyCalcium Channels, L-TypeRats, Inbred StrainsAdenosineTracheaProline-Rich Protein DomainsKineticsCholera ToxinVentricular FunctionAdrenergic beta-2 Receptor AgonistsHeart AtriaPerfusionAdrenergic beta-2 Receptor AntagonistsBlood PressureRabbitsSodium FluorideMethoxamineMuscle RelaxationGTP-Binding ProteinsPhosphorylationGuanylyl ImidodiphosphateAminophyllineSarcoplasmic ReticulumTime FactorsAtropineAdrenergic beta-3 Receptor AgonistsAdrenergic beta-1 Receptor AntagonistsAmylasesPhosphodiesterase InhibitorsAcetylcholineTheophyllineTilt-Table TestAtenololMuscle, SmoothProstaglandins ECalcium-Binding ProteinsAction PotentialsElectrocardiographyHemodynamicsReceptors, MuscarinicOxotremorineSignal TransductionAlprostadilButoxamineEnzyme ActivationGTP-Binding Protein alpha Subunits, Gi-GoLipid MobilizationTurkeysEnzyme Inhibitors