What's the matter with aneurysms?

summary

Cerebral aneurysm is a localized cystic dilatation of cerebral artery wall. Most of the causes were congenital malformations, followed by infection and arteriosclerosis. The peak age of onset is 50~54 years old, and the incidence rate of female is slightly higher than that of male. Now I'll tell you about the aneurysms? Let me tell you this.

What's the matter with aneurysms?

First, according to the theory of congenital defect of arterial wall, there is congenital deficiency of smooth muscle layer in the arterial bifurcation of Willis ring. According to the theory of postnatal degeneration of arterial wall, intracranial atherosclerosis and hypertension destroy the elastic plate in the artery and gradually bulge to form cystic aneurysm.

Second, the infection focus of the body, such as bacterial endocarditis, pulmonary infection, etc., the infective embolus falls off and erodes the cerebral artery wall to form the infective aneurysm; Head trauma can also lead to aneurysm formation. But it is rare in clinic.

Third: cerebral aneurysms are the local weak areas of the internal cerebral artery wall. Under the long-term impact of blood flow, they gradually expand outward and form small balloon like hemangiomas. The greater the local blood pressure, the higher the risk of aneurysm rupture. When rupture occurs, blood enters surrounding tissue. Sometimes, although the aneurysm does not rupture, but because of the increase in volume, it can compress the nearby nerves, resulting in the corresponding symptoms.

matters needing attention

Even in absolute bed rest bleeding, there are lower blood pressure in the case of bleeding. When the first hemorrhage forms hematoma, it is easy to rebleed. Therefore, the risk of aneurysm rupture is permanent.