Objective Sleep Disturbances in Orthostatic Intolerance

Assessment of Objective Sleep Disturbances in Orthostatic Intolerance

We wish to study sleep architecture in patients with chronic orthostatic intolerance. We will test the null hypothesis that there is no difference in time during the various phases of sleep between patients and healthy control subjects.

Inclusion Criteria:

• diagnosed with chronic orthostatic intolerance (or healthy subject)

Exclusion Criteria:

• overt cause or acute orthostatic intolerance
• pregnancy or lactation