49 studies found for:    Postural Tachycardia Syndrome
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1 Completed Cognitive Dysfunction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Behavioral: Seated Measurements;   Behavioral: Standing Measurements;   Behavioral: Self-Administered Surveys
2 Active, not 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
3 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
4 Recruiting A Study of Pyridostigmine in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Drug: pyridostigmine;   Drug: Placebo
5 Active, not 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
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 Completed Local Vasoconstriction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Losartan;   Drug: Ascorbic Acid (Vitamin C);   Drug: Normal Saline
8 Unknown  The Renin-Aldosterone Axis in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Angiotensin II
9 Enrolling by invitation The Effect of Ivabradine on Patients With Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Drug: ivabradine
10 Active, not recruiting Peripheral Dopamine in Postural Tachycardia Syndrome
Conditions: Postural Tachycardia Syndrome;   Orthostatic Intolerance
Interventions: Drug: Carbidopa;   Drug: Placebo
11 Active, not recruiting Assessment of Vascular Endothelial Function in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Device: Blood Pressure and Blood Flow
12 Active, not recruiting Adrenocorticotropic Hormone Stimulation in Postural Orthostatic Tachycardia Syndrome (POTS)
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Cosyntropin administration
13 Active, not 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
14 Recruiting Modafinil and Cognitive Function in POTS
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Placebo;   Drug: Modafinil;   Drug: Propranolol
15 Active, not 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
16 Active, not recruiting Effect of Medical Treatment and Prognosis of Postural Orthostatic Tachycardia Syndrome (POTS)
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Drug: Propranolol;   Drug: Bisoprolol;   Drug: Propranolol+pyridostigmine;   Drug: Bisoprolol+pyridostgmine
17 Recruiting POTS Adrenergic Ab (CIHR Aims #1&2)
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Phenylephrine;   Drug: Isoproterenol
18 Active, not recruiting Autonomic Nervous System and Chronic Fatigue Syndrome
Conditions: Chronic Fatigue Syndrome;   Orthostatic Intolerance;   Postural Tachycardia Syndrome
Interventions: Other: Autonomic Function Testing;   Other: Saline infusions;   Drug: L-NMMA trimethaphan;   Drug: methyldopa
19 Active, not 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
20 Active, not recruiting Sleep Actigraphy in Postural Tachycardia Syndrome (POTS)
Conditions: Postural Tachycardia Syndrome;   Orthostatic Intolerance;   Sleep Disorders
Intervention: Device: Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter

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