Vasodilation

Vasodilation (from Lat. vas - vessel + Lat. ad - to, for + Lat. latus - wide + suffix -ia), dilatation (English dilation) - expansion of the lumen of a hollow organ or vessel. Also, dilatation is sometimes called a significant (50% or more) increase in the diameter of tubular organs (for example, the esophagus).

**Vasodilation** (from English vaso - “vessel” and other Greek Latin *dilatatio* - “expansion”) is a reduction in peripheral vascular resistance caused by a decrease in total peripheral resistance. In a medical context, the term can also refer to the widening of the natural openings of blood vessels through relaxation of their walls, usually due to the action of vasodilators.\n\nSynonyms of the term include vasodilation, dilatation of arteries and veins, and vascular relaxation. Vascular tone and vascular activity return to normal after the effect of the vasodilators wears off. Normal vascular vasoconstriction in combination with physiological pulsation ensures the cyclic opening and closing of the lumen, which is necessary for the adequate functioning of most of the body's vessels.\n\nInitially it was believed that the phenomenon of vasomotion corresponds to two different mechanisms of reflex reactions - the so-called “will” or “a”

Article on the topic "Vasodilation":

Vasodilation is a physiological process of narrowing of arteries and arterioles in response to a decrease in systolic pressure in them. Clinically, this is accompanied by a decrease or disappearance of arterial hypertension. The arterioloconstrictor reflex, which helps lower blood pressure, is accompanied by the release of vasoconstrictor substances such as angiotensin, sympathetic impulses and adrenaline. A decrease in blood volume and protein content also contributes to the occurrence of this process.

Dilatation of blood vessels helps to reduce pressure in them and restore blood microcirculation, which is an important component of therapy for many pathologies. Local expansion causes resorption of exudate and accumulation of fibrin, due to which painful formations dissolve in the surrounding tissues. Some time after the therapeutic effect, tissue metabolism in areas of altered blood circulation increases, which makes it possible to reduce the inflammatory process and restore vascular patency.