Sympathectomy3-IodobenzylguanidineSympathetic Nervous SystemGanglionectomyHeartAutonomic Nervous System DiseasesIodobenzenesDenervationStellate GanglionIodine RadioisotopesTachycardia, VentricularNorepinephrineMuscle DenervationHeart RateAutonomic DenervationBlood PressureSympathectomy, ChemicalEphedrineDogsAdrenergic FibersRadiopharmaceuticalsMyocytes, CardiacPressoreceptorsShy-Drager SyndromeBaroreflexSympatholyticsReceptors, Histamine H3Electric StimulationNerve EndingsHeart FailureMyocardiumVagus NerveCarotid SinusCardiac OutputCatecholaminesAtrial RemodelingDesipramineEfferent PathwaysKidneyHyperhidrosisReflexTime FactorsCardiomyopathy, DilatedTyramineRenal ArterySciatic NerveCatsHypertensionMyocardial ContractionStroke VolumeRadionuclide ImagingParasympathetic Nervous SystemTyrosine 3-MonooxygenaseHeart VentriclesArrhythmias, CardiacSympathetic Fibers, PostganglionicHeart Conduction SystemNatriuretic Peptide, BrainHemodynamicsRats, Sprague-DawleyCardiac Surgical ProceduresOxidopaminePeripheral NervesNerve FibersAutonomic Nervous SystemDeath, Sudden, CardiacEchocardiographyRegional Blood FlowVentricular RemodelingCatheter AblationTomography, Emission-Computed, Single-PhotonVentricular Dysfunction, LeftAdrenergic beta-AntagonistsNerve RegenerationRats, Inbred StrainsPeroneal NerveOptic NerveLong QT SyndromeCerebral ArteriesSheepCardiac Pacing, ArtificialSplanchnic NervesMuscle, SkeletalCardiomegalyThallium RadioisotopesTreatment OutcomeCoronary VesselsCardiac TamponadeHeart DiseasesParkinson DiseaseTibial NerveCardiac CatheterizationNerve BlockElectrocardiographyMusclesCarbon RadioisotopesNerve CrushRats, WistarVagotomyHeart Arrest