Primary dysautonomia

This trial tests whether an insomnia treatment can improve markers of heart health in adults with insomnia and risk factors for cardiovascular disease. Participants receive either a cognitive-behavioral therapy program for insomnia or a sleep education control. The study measures…

This study looks at whether terazosin, a drug usually used for high blood pressure, can slow the progression of Parkinson's disease. Researchers are tracking changes in heart and brain scans of 15 people who are either in early stages or at high risk for Parkinson's. The goal is …

This study tests a new, non-invasive diagnostic method for long COVID. Researchers will use a single-session bioelectrical assessment to detect patterns linked to viral persistence in 50 adults with long COVID. The goal is to see if this approach can reliably identify ongoing vir…

This study is testing whether a wearable ECG patch, combined with AI analysis, can help doctors identify a wide range of heart conditions and risks from a single recording. The Cor360 system looks at many aspects of heart health at once, such as heart failure, rhythm problems, an…

This study looks at why some people develop POTS (a condition causing rapid heartbeat and dizziness) after COVID-19. Researchers think a part of the nervous system that normally fights inflammation may not work well in these patients. They will compare 150 adults with and without…

This study explores whether low-intensity focused ultrasound (LIFU) aimed at specific brain regions can influence how the body controls automatic functions like heart rate and blood pressure. Researchers will apply LIFU or a sham (fake) version to 80 volunteers and measure change…

This study aims to better understand the autonomic nervous system (ANS), which controls things like heart rate and breathing without us thinking about it. Researchers will use simple, noninvasive tests (like cold water and deep breathing) to measure how the ANS responds in 48 hea…

This study was designed to understand heart rate and sleep issues in adults who survived childhood cancer. Researchers planned to use a smartphone app and wearable device to compare survivors with their siblings. The goal was to identify who is most at risk and develop ways to pr…

This study looks at whether carvedilol, a drug used for heart failure, can reverse early heart changes seen in people with a sleep disorder that puts them at high risk for Parkinson's disease. Fifteen participants with REM sleep behavior disorder or reduced sense of smell will ta…

This study looks at what happens in the body to cause POTS and dysautonomia after viral infections, including COVID-19. About 100 women will give a blood sample and share medical records. Researchers will study immune system markers to find clues that could lead to better diagnos…

This early-phase study tests whether a single dose of modafinil, a drug that promotes wakefulness, can improve concentration and mental clarity in people with Postural Tachycardia Syndrome (POTS). About 20 adults diagnosed with POTS will take the drug and then complete computer-b…

This study looks at how insulin in the brain changes blood flow and nerve signals in healthy adults aged 18-45. Researchers will measure blood flow in the brain and legs, as well as nerve activity. The goal is to understand basic body functions, not to treat any disease.

This study at Vanderbilt University Medical Center is looking at whether people with postural tachycardia syndrome (POTS) have higher levels of certain immune proteins that might affect their symptoms. Researchers will measure these proteins in blood samples and test how the hear…

This study compares blood samples from 212 people with and without Postural Orthostatic Tachycardia Syndrome (POTS) to see if those with POTS have higher levels of certain antibodies. Researchers also want to know if these antibodies are more common in people whose POTS started a…