Sympathectomy3-IodobenzylguanidineGanglionectomyAutonomic Nerve BlockSympathetic Nervous SystemAutonomic Nervous System DiseasesIodobenzenesDenervationHeartStellate GanglionAnesthesia, EpiduralSympathectomy, ChemicalSympatholyticsComplex Regional Pain SyndromesTachycardia, VentricularForeheadIodine RadioisotopesSkin TemperatureMuscle DenervationAutonomic DenervationHeart RateBlood PressureEphedrineLidocaineShy-Drager SyndromeAtropineAtrial RemodelingNorepinephrineAdrenergic FibersCatecholaminesHyperhidrosisRenal ArteryMyocytes, CardiacTyramineKidneyCatheter AblationHypertensionOxidopamineRadiopharmaceuticalsParasympathetic Nervous SystemDogsCardiac OutputTime FactorsMyocardiumAutonomic Nervous SystemLong QT SyndromeRegional Blood FlowHemodynamicsRats, Sprague-DawleyCerebral ArteriesRats, Inbred StrainsThallium RadioisotopesParkinson DiseaseArrhythmias, Cardiac