NC Testing in LC & POTS

Who May Qualify: - Patients with diagnosis of Long COVID - SARS-COV2 test positive - Symptoms \> 12 weeks post COVID - Subjective complaint of 'brain fog" or cognitive dysfunction - Patients with diagnosis of Postural Orthostatic Syndrome (POTS) from the Calgary Autonomic Investigation and Management Clinic - Subjective complaint of 'brain fog" or cognitive impairment - Healthy participants - Without POTS or "brain fog" - Age 18 to 60 years - Female and Male - Able to give an willing to sign a consent form Who Should NOT Join This Trial: - Patients with overt causes for POTS (e.g., dehydration, prolonged bed rest) - An inability to safely withdraw from medicine(s) that could make test interpretation difficult and impossible. - Other factors which are in the investigator's opinion would prevent the participant from completing the protocol, including poor compliance during previous studies or an unpredictable schedule. - Unable to give an willing to sign a consent form. Always talk to your doctor about whether this trial is right for you.