Steven A. Shea is a Senior Professor at Oregon Health & Science University. His research spans sleep medicine, chronobiology, and cardiovascular physiology, focusing on the endogenous circadian system’s impact on blood pressure regulation, particularly in older adults. Recent work investigates bedtime regularization as adjunctive hypertension therapy, circadian influences on inflammatory markers, and the effects of cannabis, alcohol, and tobacco on sleep and cardiac autonomic activity. His 2026 review in *Physiological Reviews* explores circadian biology’s potential for cardiovascular health. He also examines interactions between sleep, psychological symptoms, and substance use, addressing public health implications of sleep disorders.