What is the temporary rise in blood pressure that may occur during forcible exhalation called?

The temporary rise in blood pressure that may occur during forcible exhalation is known as the Valsalva effect. This physiological phenomenon arises when an individual performs a maneuver where they forcefully exhale while their mouth and nose are closed, creating an increase in intrathoracic pressure. As a result, this pressure compresses the large veins in the thorax, leading to a temporary decrease in venous return to the heart. Initially, this can cause a reduction in cardiac output and blood pressure, followed by a reflex increase in heart rate and blood pressure as the body compensates for the changes.

This response illustrates the intricate balance of the autonomic nervous system in regulating blood pressure through baroreceptor feedback mechanisms. In clinical practice, understanding the Valsalva effect is important when monitoring patients, as it can influence cardiovascular responses during diagnostic and therapeutic procedures.