Cognitive Dysfunction in Postural Tachycardia Syndrome

A common complaint among people with Postural Tachycardia Syndrome (POTS) is "brain fog" or difficulty concentrating. This is very poorly understood. To better understand this cognitive dysfunction, the investigators will test people with POTS and people without POTS using various neuropsychiatric instruments. The investigators hypothesis is that people with POTS will have greater abnormalities on neuropsychiatric testing than normal controls.