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56 studies found for:    Open Studies | "Orthostatic Intolerance"
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Rank Status Study
1 Recruiting Treatment of Orthostatic Intolerance
Conditions: Tachycardia;   Chronic Orthostatic Intolerance
Interventions: Drug: Acetazolamide;   Drug: Atomoxetine;   Other: NO Drug;   Drug: Clonidine;   Drug: Entacapone;   Drug: Entacapone & Propranolol;   Drug: Atomoxetine & Propranolol;   Drug: Indomethacin;   Drug: Mecamylamine;   Drug: Isosorbide Dinitrate;   Dietary Supplement: Melatonin;   Drug: Midodrine;   Drug: Modafinil;   Drug: Octreotide;   Radiation: Placebo;   Drug: Propranolol;   Drug: Modafinil & Propranolol;   Drug: Sertraline;   Procedure: IV Saline;   Other: Drinking Water;   Device: Breathing Device;   Drug: memantine;   Device: Abdominal binder
2 Recruiting Genetic Basis of Mitral Valve Prolapse
Condition: Mitral Valve Prolapse
Intervention:
3 Recruiting Pathophysiology of Orthostatic Intolerance
Conditions: Tachycardia;   Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: DAXOR;   Procedure: QSweat;   Drug: Intrinsic Heart Rate
4 Recruiting EEG Characteristics in Youth POTS and/or Syncope
Conditions: Syncope;   Postural Tachycardia Syndrome;   Orthostatic Intolerance
Intervention: Device: Abdominal and lower extremity compression
5 Recruiting Peripheral Dopamine in Postural Tachycardia Syndrome
Conditions: Postural Tachycardia Syndrome;   Orthostatic Intolerance
Interventions: Drug: Carbidopa;   Drug: Placebo
6 Recruiting Treatment of Orthostatic Hypotension
Conditions: Autonomic Nervous System Diseases;   Orthostatic Hypotension;   Dopamine Beta-Hydroxylase Deficiency;   Orthostatic Intolerance
Interventions: Drug: droxidopa;   Drug: placebo;   Drug: alpha-methyldopa;   Drug: carbidopa;   Drug: metyrosine;   Drug: levodopa;   Drug: atomoxetine;   Drug: metoclopramide
7 Recruiting Study on Safety and Performance of Medtentia Mitral Valve Repair System in Surgical Repair of Mitral Regurgitation
Conditions: Mitral Regurgitation;   Mitral Insufficiency;   Mitral Valve Prolapse
Intervention: Device: Mitral valve repair using Medentia Annuloplasty Ring
8 Recruiting Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Saline;   Other: Placebo
9 Recruiting High Sodium Diet and External Abdominal Compression in POTS
Condition: Postural Orthostatic Tachycardia Syndrome
Intervention: Device: External automated abdominal binder
10 Recruiting Study on Baroreceptor Function in Relation to Orthostatic Blood Pressure Regulation After Hip Surgery
Conditions: Hypotension, Orthostatic;   Total Hip Replacement
Intervention:
11 Recruiting Local Vasoconstriction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Losartan;   Drug: Ascorbic Acid (Vitamin C);   Drug: Normal Saline
12 Recruiting Breathing Device in Postural Orthostatic Tachycardia Syndrome (POTS)
Conditions: Postural Tachycardia Syndrome;   Postural Orthostatic Tachycardia Syndrome
Interventions: Device: Inspiratory Threshold Device (Res-Q-Gard ITD);   Device: Sham Inspiratory Threshold Device
13 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
14 Recruiting Mechanisms of Vasovagal Syncope
Conditions: Vasovagal Syncope;   Postural Tachycardia Syndrome
Interventions: Drug: Phenylephrine;   Drug: L-Ng-monomethyl Arginine (L-NMMA)
15 Recruiting Dietary Salt in Postural Tachycardia Syndrome
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: Blood Volume;   Radiation: Total Blood Volume;   Procedure: Exercise Capacity Test - Bicycle;   Procedure: Posture Study
16 Recruiting Aldosterone & Sodium Regulation in Postural Tachycardia Syndrome - Screening
Condition: Postural Tachycardia Syndrome
Interventions: Other: Autonomic Function Testing;   Other: Posture Study;   Procedure: Measurement of Total Blood Volume;   Other: Exercise Capacity Test
17 Recruiting Modafinil and Cognitive Function in POTS
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Placebo;   Drug: Modafinil;   Drug: Propranolol
18 Unknown  The Renin-Aldosterone Axis in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Angiotensin II
19 Recruiting Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: Total Blood Volume;   Procedure: Exercise Capacity Test - Bicycle;   Procedure: Posture Study
20 Recruiting Cognitive Dysfunction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Behavioral: Seated Measurements;   Behavioral: Standing Measurements;   Behavioral: Self-Administered Surveys

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