Autonomic Nervous System DiseasesAutonomic Nervous SystemHeart RateDiabetic NeuropathiesValsalva ManeuverHypotension, OrthostaticAdie SyndromeMultiple System AtrophyShy-Drager SyndromeVagus Nerve DiseasesBaroreflexTilt-Table TestPrimary DysautonomiasReflex, AbnormalPseudoephedrineElectrocardiography, AmbulatoryDiagnostic Techniques, NeurologicalBlood PressurePostural Orthostatic Tachycardia SyndromeCardiovascular SystemTonic PupilDysautonomia, FamilialPosture3-IodobenzylguanidineElectrocardiographyPain Insensitivity, CongenitalPolyneuropathiesArrhythmia, SinusHeartGuillain-Barre SyndromeParasympathetic Nervous SystemLewy Body DiseaseDizzinessParkinson DiseaseIodobenzenesNeuroleptic Malignant SyndromeHypotensionFludrocortisoneSympathetic Nervous SystemSweatingGalvanic Skin ResponseTachycardiaErectile DysfunctionVentricular Dysfunction, LeftCase-Control StudiesPupilTime FactorsReflexPolyradiculoneuropathyVagus NerveSyndromeArrhythmias, CardiacBradycardiaAtaxiaSupine PositionSeverity of Illness IndexDiabetes Mellitus, Type 1Prospective StudiesDelayed DiagnosisNeural ConductionRetrospective StudiesRisk FactorsCardiovascular DiseasesDisease Models, AnimalEarly DiagnosisRespirationFollow-Up StudiesPrenatal DiagnosisNeurologic ExaminationSensitivity and SpecificityPeripheral Nervous System DiseasesBlood Pressure Monitoring, AmbulatoryCircadian RhythmTreatment OutcomeStatistics, NonparametricNorepinephrineAnalysis of VarianceSjogren's SyndromeIodine RadioisotopesDiabetes Mellitus, Type 2Cross-Sectional StudiesHypertensionHemodynamicsDiagnosisExercise TestBrainVentricular DysfunctionSexual Dysfunction, PhysiologicalBlood GlucoseSexual Dysfunctions, PsychologicalPredictive Value of TestsEndothelium, VascularDiagnostic ErrorsMagnetic Resonance ImagingBiopsyBiological MarkersTomography, X-Ray ComputedVentricular Dysfunction, RightPrognosisReproducibility of Results