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41 studies found for:    Open Studies | "Orthostatic Intolerance"
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1 Recruiting Treatment of Orthostatic Intolerance in Patients With Parkinson's Disease Using Midodrine
Conditions: Orthostatic Intolerance;   Parkinson's Disease
Intervention: Drug: Midodrine
2 Recruiting Pathophysiology of Orthostatic Intolerance
Conditions: Tachycardia;   Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: DAXOR;   Procedure: QSweat;   Drug: Intrinsic Heart Rate
3 Recruiting Reducing Orthostatic Intolerance With Oral Rehydration in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Patients
Conditions: Chronic Fatigue Syndrome;   Myalgic Encephalomyelitis;   Systemic Exertion Intolerance Disease (SEID);   Postural Tachycardia Syndrome (POTS);   Neurally Mediated Syncope (NMS)
Interventions: Drug: Normal Saline;   Dietary Supplement: Oral Rehydration Solution
4 Recruiting Vitamin D Deficiency and Dysautonomia
Conditions: Vitamin D Deficiency;   Orthostatic Intolerance;   Nausea
Intervention: Dietary Supplement: vitamin D supplement
5 Recruiting EEG Characteristics in Youth POTS and/or Syncope
Conditions: Syncope;   Postural Tachycardia Syndrome;   Orthostatic Intolerance
Intervention: Device: Abdominal and lower extremity compression
6 Recruiting Autoimmune Basis for Postural Tachycardia Syndrome
Conditions: Postural Orthostatic Tachycardia Syndrome;   Postural Tachycardia Syndrome;   Tachycardia;   Arrhythmias, Cardiac;   Autonomic Nervous System Diseases;   Orthostatic Intolerance;   Cardiovascular Diseases;   Primary Dysautonomias
Interventions: Drug: phenylephrine;   Drug: isoproterenol;   Radiation: 25 micro-Ci of radiation;   Procedure: Posture study with blood samples;   Procedure: 24-hour heart rhythm and blood pressure monitoring;   Procedure: Quantitative Axonal Sudomotor Reflex Testing;   Procedure: Autonomic function tests
7 Not yet recruiting Effects of Melatonin to Reduce Nocturnal Hypertension in Patients With Neurogenic Orthostatic Hypotension
Conditions: Hypotension, Orthostatic;   Hypertension;   Autonomic Nervous System Diseases
Interventions: Drug: Yohimbine;   Drug: Melatonin
8 Recruiting Northera Improves Postural Tachycardia Syndrome (POTS) and Postural Vasovagal Syncope (VVS)
Conditions: Postural Tachycardia Syndrome (POTS);   Vasovagal Syncope (VVS);   Fainting
Interventions: Drug: Northera (Droxidopa);   Drug: Placebo
9 Recruiting Modafinil and Cognitive Function in POTS
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Placebo;   Drug: Modafinil;   Drug: Propranolol
10 Recruiting Mechanisms of Vasovagal Syncope
Conditions: Vasovagal Syncope;   Postural Tachycardia Syndrome
Interventions: Drug: Phenylephrine;   Drug: L-Ng-monomethyl Arginine (L-NMMA)
11 Recruiting Post-Exercise Hypotension After Water Exercise
Condition: Postexercise Hypotension
Intervention: Other: Water aerobic exercise session (WATER)
12 Recruiting Norepinephrine Transporter Blockade, Autonomic Failure (NETAF)
Condition: Neurogenic Orthostatic Hypotension
Interventions: Drug: Atomoxetine;   Drug: Placebo
13 Recruiting TD-9855 Phase 2 in Neurogenic Orthostatic Hypotension (nOH)
Condition: Neurogenic Orthostatic Hypotension
Interventions: Drug: TD-9855;   Drug: Placebo
14 Recruiting Dawn Simulation and Postural Hypotension
Condition: Orthostatic Hypotension
Intervention: Device: Light
15 Recruiting Sustained Effect of Droxidopa in Symptomatic Neurogenic Orthostatic Hypotension
Condition: Symptomatic Neurogenic Orthostatic Hypotension
Interventions: Drug: Droxidopa capsules;   Drug: Placebo capsules
16 Recruiting Evaluation of the Effect of Hydration About Orthostatic Hypotension in the Elderly. Difference With Venous Compression
Condition: Orthostatic Hypotension
Interventions: Other: Hydration;   Other: Venous contention
17 Recruiting Droxidopa / Pyridostigmine in Orthostatic Hypotension
Condition: Orthostatic Hypotension
Interventions: Drug: Droxidopa;   Drug: Pyridostigmine Bromide
18 Recruiting Blood Pressure Lowering Effects of Angiotensin-(1-7) in Primary Autonomic Failure
Conditions: Autonomic Nervous System Disorders;   Pure Autonomic Failure;   Shy-Drager Syndrome;   Orthostatic Hypotension, Dysautonomic
Interventions: Drug: Angiotensin-(1-7);   Drug: Saline
19 Recruiting Reduction in Splanchnic Capacitance Contributes to Sympathetically Dependent Hypertension in Autonomic
Conditions: Multiple System Atrophy;   Orthostatic Hypotension;   Supine Hypertension
Interventions: Drug: Trimethaphan;   Drug: Placebo
20 Recruiting Hemodynamic Mechanisms of Abdominal Compression in the Treatment of Orthostatic Hypotension in Autonomic Failure
Conditions: Orthostatic Hypotension;   Pure Autonomic Failure;   Multiple System Atrophy;   Autonomic Failure
Interventions: Other: Abdominal compression;   Other: Sham abdominal compression;   Drug: Placebo pill;   Drug: midodrine

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Study has passed its completion date and status has not been verified in more than two years.