Sympathetic Nervous SystemSympathetic Fibers, Postganglionic3-IodobenzylguanidineAdrenergic FibersSympathectomy, ChemicalSympathectomyGanglionectomySweat GlandsStellate GanglionHeartEphedrineAutonomic Nervous System DiseasesDenervationSuperior Cervical GanglionNorepinephrineHydroxydopaminesIodobenzenesParasympathetic Nervous SystemSplanchnic NervesNaphthylvinylpyridineNerve Growth FactorTyrosine 3-MonooxygenaseGanglia, SympatheticOxidopamineMetipranololParasympathectomyNeurons, EfferentDihydroergotamineSemaphorin-3ASympathomimeticsNADH Tetrazolium ReductaseSympatholyticsNerve Growth FactorsCatecholaminesTyramineRadiopharmaceuticalsPure Autonomic FailureAnimals, NewbornGuanethidineIodine RadioisotopesAxonsElectric StimulationReceptors, AdrenergicNorepinephrine Plasma Membrane Transport ProteinsNeuropeptide YAutonomic Nervous SystemNerve EndingsTomography, Emission-ComputedNeuronsAtropineRats, Sprague-DawleyReceptors, Adrenergic, betaDesipramineAdrenergic AntagonistsMyocardiumReceptors, Adrenergic, beta-1Pineal GlandAdrenergic alpha-AntagonistsReserpineRats, WistarNerve FibersDiabetic NeuropathiesDogsThallium RadioisotopesImmunohistochemistrySubmandibular GlandPropranololAdrenergic alpha-AgonistsRats, Inbred StrainsTomography, Emission-Computed, Single-PhotonHeart RatePrazosinEpinephrinePhentolamineTime FactorsHeart Conduction SystemCatsAdipose Tissue, BrownAdrenergic beta-AntagonistsCarbon RadioisotopesAdrenal GlandsArrhythmias, CardiacHeart VentriclesCoronary CirculationArteriesVentricular Function, LeftVascular ResistanceHemodynamicsIsoproterenolRNA, MessengerMotor NeuronsMuscle DenervationMice, TransgenicNeurons, AfferentAnalysis of VarianceUbiquitin ThiolesteraseDisease Models, AnimalCholinergic FibersRegional Blood FlowCells, Cultured