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
- 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
- Sherifi E, Dixon A, Filion A, et. al. "Testing within-person correlates of daily fearlessness about death in young adults." Journal of affective disorders, (), (2026) 122002. doi: 10.1016/j.jad.2026.122002
- Nandurkar R, Vasanthakumar S, Stewart J, et. al. "Breast Arterial Calcification as a Predictor for Future Cardiovascular Events and Mortality: A Systematic Review and Meta-analysis." Journal of breast imaging, 8(3), (2026) 239-252. doi: 10.1093/jbi/wbaf087
- Timmerman AJ, Brady RE, Lawson VM, et. al. "Mechanical tuning of replication stress tolerance and genomic stability through the checkpoint mediator Mrc1." bioRxiv : the preprint server for biology, (), (2026) . pii: 2026.05.14.725212. doi: 10.64898/2026.05.14.725212
- Han J, Li Y, Lee S, et. al. "A critical review of potential modifiers of air pollutant associations with dementia and related outcomes." Neurotoxicology, 114(), (2026) 103470. doi: 10.1016/j.neuro.2026.103470
- Alizada S, Al Qudah H, Vu T, et. al. "Ultrasound imaging features of cervical lymph nodes with melanoma metastasis compared with benign cervical nodes." Melanoma research, (), (2026) . doi: 10.1097/CMR.0000000000001107
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
