Julian M. Stewart, M.D., Ph.D., directs the Center for Hypotension, which has had NIH funding for 24 years. He is trained in medicine, integrative physiology, and computer-based biophysical methods.
Dr. Stewart's laboratory has been studying orthostatic intolerance in conscious humans for more than 20 years, with a particular focus on circulatory regulation in orthostatic intolerance (OI). Chronic OI is better known as postural tachycardia syndrome (POTS). His research has contributed to the literature regarding measurements of systemic vascular resistance, cardiac output, and venous capacitance as well as microvascular properties. Recently, Dr. Stewart's research has been focused on connections between hypocapnia, hypercapnia, hyperventilation, impaired cognition, cardiovagal baroreflexes, cerebral autoregulation, splanchnic vasoconstriction and venoconstriction, and enhanced sympathetic activity in OI patients.
Education
- Fellowship, Pediatric Cardiology, New York Hospital-Cornell University
- Residency, Physiology/Biophysics, NYU Medical Center
- M.D., University of Chicago
- Ph.D., University of Chicago
- A.B., Physics, Cornell University
- Postdoc, Pediatric Cardiology, New York Hospital-Cornell University
Areas of Expertise
- Pediatrics/Pediatric Cardiology
- Hypotension
- DOD Gulf War Syndrome
- CFS/Fibromyalgia
Research
Research interests include computational circulatory physiology, investigating vascular and cardiac properties in animal model systems, as well as during diagnostic procedures such as cardiac catheterization and flow-volume monitoring, and redistribution in critically ill infants and children. Correlative work studying the relation of cardiovascular properties to nitric oxide physiology is in progress. Recent work has also included connections of peripheral flow and muscle pump activity with osteoporosis, and contractual work with the Department of Defense related to muscular dystrophy.
Publications
- Reyes JL, Fedorowski A, Deering T, et. al. "What Are We Treating? The Need for Broader Provider Understanding of POTS, Its Nature, and Care." The American journal of medicine, (), (2026) . pii: S0002-9343(26)00447-X. doi: 10.1016/j.amjmed.2026.05.042
- Yeo SN, Stewart JG. "Development and Initial Validation of the Response to Suicidal Ideation Inventory (RSII)." Journal of clinical psychology, (), (2026) . doi: 10.1002/jclp.70163
- Robler SK, Stewart J, Reaves C, et. al. "Can schools detect mild hearing loss? Evaluating screening accuracy and feasibility." International journal of pediatric otorhinolaryngology, (), (2026) 112849. doi: 10.1016/j.ijporl.2026.112849
- Evans D, LaPointe A, Peel C, et. al. "Neisseria gonorrhoeae Sequence Type 16676 in Disseminated Infections, Minnesota, USA, 2025." Emerging infectious diseases, 32(6), (2026) 1022-1025. doi: 10.3201/eid3206.260126
- Francis PA, Pagani O, Fleming GF, et. al. "Final outcomes of the SOFT and TEXT phase III trials in premenopausal hormone receptor-positive early breast cancer." Annals of oncology : official journal of the European Society for Medical Oncology, (), (2026) . pii: S0923-7534(26)00888-4. doi: 10.1016/j.annonc.2026.05.704
- Stewart JM, Robinson DG, Howe KM, et. al. "Assessment of the Prevalence of Angiostrongylus cantonensis Infection in Gastropods of Puerto Rico." The American journal of tropical medicine and hygiene, (), (2026) . pii: ajtmh.25-0683. doi: 10.4269/ajtmh.25-0683
- Fessler AG, Corcorran MA, Violette LR, et. al. "Correlates of Sexually Transmitted Infection (STI) Positivity and Implementation of Point-of-Care STI Testing at a Mobile Clinic for Women Who Inject Drugs in Seattle, WA." Sexually transmitted diseases, (), (2026) . doi: 10.1097/OLQ.0000000000002360
Professional Service
- CDC-NIH Committee on Chronic Fatigue in Adolescents
- NIH/NIAID Special Emphasis Panel
- Ad Hoc Reviewer CVS-A
- Reviewer, Center for Interdisciplinary Cardiovascular Sciences
