👉 Peristalsis, also known as pericardial peristalsis or venous peristalsis, is a physiological process in which the walls of the heart and veins contract to expel blood from the heart. This movement occurs in response to changes in pressure within the body, such as when the heart contracts during exercise or when there's a decrease in blood flow in the body. The term "peristalsis" comes from Latin and means "flowing" or "