45 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 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
3 Recruiting Pathophysiology of Orthostatic Intolerance
Conditions: Tachycardia;   Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: DAXOR;   Procedure: QSweat;   Drug: Intrinsic Heart Rate
4 Recruiting Effect of Methylprednisolone on Orthostatic Intolerance and Heart Rate Variability in Hip-arthroplasty Patients
Condition: Osteoarthrosis
Interventions: Drug: Methylprednisolone;   Drug: Isotonic Sodium Chloride
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 High Sodium Diet and External Abdominal Compression in POTS
Condition: Postural Orthostatic Tachycardia Syndrome
Intervention: Device: External automated abdominal binder
7 Recruiting Study on Baroreceptor Function in Relation to Orthostatic Blood Pressure Regulation After Hip Surgery
Conditions: Hypotension, Orthostatic;   Total Hip Replacement
Intervention:
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 Assessment of Antibodies and Inflammatory Markers in Postural Tachycardia Syndrome
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Other: History;   Other: Physical;   Other: blood draw;   Behavioral: Questionnaires
10 Recruiting Modafinil and Cognitive Function in POTS
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Placebo;   Drug: Modafinil;   Drug: Propranolol
11 Recruiting Mechanisms of Vasovagal Syncope
Conditions: Vasovagal Syncope;   Postural Tachycardia Syndrome
Interventions: Drug: Phenylephrine;   Drug: L-Ng-monomethyl Arginine (L-NMMA)
12 Unknown  The Renin-Aldosterone Axis in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Angiotensin II
13 Not yet recruiting Norepinephrine Transporter Blockade, Autonomic Failure (NETAF)
Condition: Neurogenic Orthostatic Hypotension
Interventions: Drug: Atomoxetine;   Drug: Placebo
14 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
15 Recruiting TD-9855 Phase 2 in Neurogenic Orthostatic Hypotension (nOH)
Condition: Neurogenic Orthostatic Hypotension
Interventions: Drug: TD-9855;   Drug: Placebo
16 Recruiting POTS Adrenergic Ab (CIHR Aims #1&2)
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Phenylephrine;   Drug: Isoproterenol
17 Recruiting Observation of ImageReady™ MR Conditional Pacing System in China
Conditions: Arhythmia;   Atrioventricular Heart-block;   Chronic Bundle Branch or Branch Block;   Carotid Sinus Hypersensitivity Reaction Syndrome;   Vasovagal Syncope
Intervention: Device: ImageReady™ MR Conditional Pacing System
18 Not yet recruiting Dawn Simulation and Postural Hypotension
Condition: Orthostatic Hypotension
Intervention: Device: Light
19 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
20 Recruiting Sustained Effect of Droxidopa in Symptomatic Neurogenic Orthostatic Hypotension
Condition: Symptomatic Neurogenic Orthostatic Hypotension
Interventions: Drug: Droxidopa capsules;   Drug: Placebo capsules

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