Sympathectomy3-IodobenzylguanidineGanglionectomyAutonomic Nervous System DiseasesAutonomic Nervous SystemSympathetic Nervous SystemIodobenzenesDenervationHeartTachycardia, VentricularIodine RadioisotopesAutonomic DenervationMuscle DenervationHeart RateSympathectomy, ChemicalStellate GanglionParasympathetic Nervous SystemShy-Drager SyndromeEphedrineBlood PressureNorepinephrineCentral Nervous SystemAdrenergic FibersCatecholaminesSympatholyticsAtrial RemodelingHyperhidrosisRenal ArteryVagus NerveNervous SystemHypertensionDogsMyocytes, CardiacKidneyTyramineTime FactorsGanglionic BlockersCardiac OutputArrhythmias, CardiacCatheter AblationOxidopamineHemodynamicsElectrocardiographyAutonomic PathwaysRadiopharmaceuticalsParasympathectomyAutonomic AgentsMyocardiumGalvanic Skin ResponseRats, Sprague-DawleyArrhythmia, SinusAutonomic Nerve BlockRegional Blood FlowLong QT SyndromeElectrocardiography, AmbulatoryAtropineCardiovascular Physiological ProcessesDeath, Sudden, CardiacRats, Inbred StrainsCerebral ArteriesPropranololParkinson DiseaseThallium RadioisotopesEnteric Nervous SystemBaroreflexCentral Nervous System DiseasesTrimethaphanDysautonomia, FamilialPeripheral Nervous SystemCardiovascular SystemTreatment OutcomePressoreceptorsCardiac Surgical ProceduresCarbon RadioisotopesCardiovascular Physiological PhenomenaValsalva ManeuverGanglia, AutonomicHexamethonium