Anybody have an av fistula? Is the fistula a natural thing or from an injury?

Well, There are two types of arteriovenous fistulas, congenital and acquired. A congenital arteriovenous fistula is one that formed during fetal development. An acquired arteriovenous fistula is one that develops after a person is born. After catheterizations, arteriovenous fistulas may occur as a complication of the arterial puncture in the leg or arm. Fistulas also form without apparent cause. In the.