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Can a watch reveal hidden sleep troubles in POTS patients?

NCT ID NCT00692471

Knowledge-focused Sponsor: Satish R. Raj Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study uses a wrist-worn activity watch to measure sleep quality in people with orthostatic intolerance (a condition where standing causes dizziness) compared to healthy volunteers. Researchers want to see if these patients have worse sleep, like taking longer to fall asleep. The study involves 100 adults aged 18-65 and is purely observational, aiming to gather knowledge rather than test a treatment.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could help doctors better understand and diagnose sleep issues in people with orthostatic intolerance.
What could go wrong
This is a small, early-stage observational study. It only measures sleep, not treatments, so it may not lead to direct improvements for patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Start date

Jun 2008

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients diagnosed with the Postural Tachycardia Syndrome. The criteria include: * an increase in heart rate on standing (from supine) of \>30 bpm * in the setting of symptoms of cerebral hypoperfusion that are worse with standing and better when recumbent * the symptoms are daily or almost daily * the symptoms are chronic (lasting greater than 6 motnsh)

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Diagnosed with orthostatic intolerance by the Vanderbilt Autonomic Dysfunction Center * Control subjects will be free of orthostatic intolerance and other major medical problems, free of medications during the study * Age between 18-65 years * Male and female subjects are eligible. * Able and willing to provide informed consent Exclusion Criteria: * Overt cause for postural tachycardia (such as acute dehydration) * Self-report of pregnancy * Inability to give, or withdrawal of, informed consent * Other factors which in the investigator's opinion would prevent the subject from completing the protocol

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Conditions

The condition(s) this trial relates to.

Orthostatic Intolerance postural orthostatic tachycardia syndrome sleep-wake disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Orthostatic intolerance Postural tachycardia syndrome Sleep disorders

Contacts and locations

Locations

  • Vanderbilt University

    Nashville, Tennessee, 37232-2195, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.