Stress causes an expansion of the carotid artery and accelerates cerebral blood flow. However, ultrasound examination showed that in people with high arterial pressure this reflex was disturbed.

Scientists from the University of Southern California evaluated the reactivity of the carotid artery and cerebral blood flow in response to neuropsychiatric stress in 30 healthy volunteers (aged 19 to 60 years) and 28 patients with hypertension (aged 38-64 years). Stress dilated blood vessels of healthy people, which caused increased blood circulation of the brain. In hypertensive patients, these changes did not occur.

In order to cause stress, participants were forced to read, count, answer questions. Ultrasound technology made it possible to measure the expansion of arteries, and scientists also monitored the pressure and heart rate.

Poor vasoconstriction in ischemic heart disease contributes to the risk of ischemia in patients. Insufficient blood flow to the brain during mental activity can damage the brain's work in hypertensive patients.

sportzal. com.