An observational study in Postural Tachycardia Syndrome, Orthostatic Intolerance and Sleep Disorders, sponsored by Satish R. Raj. Active, not recruiting at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-10-08.
Sponsored by Satish R. Raj · Observational
We propose to use actigraphy (measured by activity watches) as a tool to quantify sleep disturbances in patients with orthostatic intolerance compared with healthy control subjects. In this pilot study, we will test the null hypothesis (Ho) that there are no differences in the sleep quality between patients with orthostatic intolerance and healthy control subjects.
We propose to use actigraphy (measured by activity watches) as a tool to quantify sleep disturbances in patients with orthostatic intolerance compared with healthy control subjects. In this pilot study, we will test the null hypothesis (Ho) that there are no differences in the sleep quality between patients with orthostatic intolerance and healthy control subjects.
131 studies on the registry are indexed under Postural Orthostatic Tachycardia Syndrome; 44 are open to participants now.
This study's planned enrollment of 100 is close to the median of 100 across 31 observational studies indexed under Postural Orthostatic Tachycardia Syndrome.
Browse Postural Orthostatic Tachycardia Syndrome studies →Satish R. Raj is the lead sponsor of 7 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients diagnosed with the Postural Tachycardia Syndrome. The criteria include:
Exclusion Criteria:
Patients meeting the diagnostic criteria for the Postural Tachycardia Syndrome, a form of Orthostatic Intolerance
Device: Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter
Healthy control subjects who do not meet the criteria for the Postural Tachycardia Syndrome
Device: Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter
Watch to be worn on wrist for 7 days (except in water) that will measure activity/movement.
Also known as: ActiWatch from Minimitter
Sleep Latency
Time frame: 1 week
Sleep Efficiency
Time frame: 1 week
Wake After Sleep Onset
Time frame: 1 week
This study is active, not recruiting, as verified in Oct 2025. You cannot join it, but the record below documents what was studied.
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Postural Orthostatic Tachycardia Syndrome→
Satish R. Raj