Autonomic Nervous SystemAutonomic Nervous System DiseasesHeart RateCentral Nervous SystemParasympathetic Nervous SystemSympathetic Nervous SystemNervous SystemGanglionic BlockersAutonomic DenervationVagus NerveAutonomic PathwaysAutonomic AgentsGalvanic Skin ResponseAutonomic Nerve BlockArrhythmia, SinusBlood PressureCardiovascular Physiological ProcessesElectrocardiographyElectrocardiography, AmbulatoryCentral Nervous System DiseasesEnteric Nervous SystemAtropineTrimethaphanPeripheral Nervous SystemDysautonomia, FamilialPropranololHeartCardiovascular SystemBrainBaroreflexCardiovascular Physiological PhenomenaHexamethoniumCircadian RhythmParasympatholyticsMuscarinic AntagonistsValsalva ManeuverParasympathectomyCentral Nervous System NeoplasmsGanglia, AutonomicNorepinephrineGlycopyrrolateCatecholaminesChlorisondamineNeuronsArrhythmias, CardiacMassageTime FactorsPancreatic PolypeptideHypoventilationAdrenergic AgentsPsychophysiologyNervous System Physiological PhenomenaOxymetazolineShy-Drager SyndromeDogsBradycardiaCardiography, ImpedanceSupine PositionNeurosecretory SystemsAdrenergic beta-AntagonistsRelaxationTilt-Table TestPeripheral NervesStress, PsychologicalVagus Nerve StimulationRespirationCentral Nervous System InfectionsSignal Processing, Computer-AssistedAtrial FunctionHemodynamicsAnalysis of VarianceTelemetryNeuroimmunomodulationEpinephrineMagnetocardiographyNervous System DiseasesAdrenergic FibersArousalPressoreceptorsHead-Down TiltSympathectomyNervous System NeoplasmsHeart Rate, FetalGerminal CenterRespiratory RateAdrenergic NeuronsHeart Conduction SystemAdrenergic AgonistsHypotension, OrthostaticReflexGanglia, SympatheticAdrenergic AntagonistsHexamethonium CompoundsNerve Tissue ProteinsHypothalamusRats, WistarGanglionic StimulantsSympathetic Fibers, PostganglionicElectroacupunctureReflex, Abnormal