Cerebrovascular arteriovenous malformation

Congenital malformation consisting of entangled dilated blood vessels, in which the input blood flow of the arteries directly enters the output channel of the vein, and the resistance of capillary bed formation is lacking in the middle. The consequence of this special deformed structure is deformed blood vessels Progressive enlargement occurs, through compression, stimulation, shunting blood supply or bleeding, damage to adjacent nerve tissue, resulting in various neurological abnormalities. Arteriovenous malformations (AVM) occur particularly at the connections between the cerebral arterial beds, most It is commonly found in the frontal-parietal area, the frontal lobe, the cerebral parenchyma of the lateral cerebellum, or the overlying occipital lobe.