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Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01000350
Recruitment Status : Active, not recruiting
First Posted : October 23, 2009
Last Update Posted : September 1, 2020
Information provided by (Responsible Party):
Satish R. Raj, Vanderbilt University Medical Center

Brief Summary:
The investigators will test whether an intravenous infusion of saline (salt water) will improve the exercise capacity in patients with postural tachycardia syndrome (POTS).

Condition or disease Intervention/treatment Phase
Postural Tachycardia Syndrome Drug: Saline Other: Placebo Not Applicable

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 40 participants
Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Intravenous Saline on Exercise Tolerance in Orthostatic Intolerance
Study Start Date : October 2009
Estimated Primary Completion Date : June 2021
Estimated Study Completion Date : June 2021

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Exercise Post Saline
Saline infusion 1L hours before exercise test
Drug: Saline
IV Normal Saline infused over 30-60 minutes given 3-6 hours PRIOR to exercise study
Other Names:
  • Normal Saline
  • 0.9% saline

Placebo Comparator: Placebo
Placebo given prior to exercise test
Other: Placebo
Placebo x1 lactose tablet

Primary Outcome Measures :
  1. Difference in VO2max between saline day and placebo day [ Time Frame: Within 2 week ]
    VO2max will be measured hours after saline and after placebo. The 2 interventions will be less than 2 weeks apart.

Secondary Outcome Measures :
  1. Exercise capacity/Maximal Load (Watts) during peak VO2 [ Time Frame: Less than 2 weeks ]
    Maximal exercise load will be measured hours after saline and after placebo. The 2 interventions will be less than 2 weeks apart.

  2. Cardiac output between exercise tests (inert gas rebreathing technique) [ Time Frame: 2-10 Days between exercise tests ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Meet diagnostic criteria of Postural Tachycardia Syndrome (POTS) 28
  • Age between 18-65 years
  • Male and female are eligible (although the majority of POTS patients are female).
  • Able and willing to provide informed consent

Exclusion Criteria:

  • Presence of medical conditions that can explain postural tachycardia (e.g., acute dehydration, medications)
  • Pregnancy
  • Other factors which in the investigator's opinion would prevent the subject from completing the protocol.
  • Patients who are bedridden or chair-ridden

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01000350

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United States, Tennessee
Vanderbilt University
Nashville, Tennessee, United States, 37232-2195
Sponsors and Collaborators
Vanderbilt University
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Principal Investigator: Satish R Raj, MD MSCI Vanderbilt University
Additional Information:
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Responsible Party: Satish R. Raj, Adjunct Associate Professor of Medicine, Vanderbilt University Medical Center Identifier: NCT01000350    
Other Study ID Numbers: 090942
First Posted: October 23, 2009    Key Record Dates
Last Update Posted: September 1, 2020
Last Verified: August 2020
Keywords provided by Satish R. Raj, Vanderbilt University Medical Center:
orthostatic intolerance
exercise capacity
Additional relevant MeSH terms:
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Postural Orthostatic Tachycardia Syndrome
Orthostatic Intolerance
Pathologic Processes
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Cardiac Conduction System Disease
Primary Dysautonomias
Autonomic Nervous System Diseases
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms