What is the purpose of av fistula ligation, and what is a possible diagnosis?

AV Malformation?: Depending on the location, an abnormal communication between arteries and veins can have many different symptoms. The purpose of correction is to alleviate the symptoms. In most cases, the aim is to stop possible deadly bleeding. If this is related to your sudden abdominal pain, then tests should confirm it. If it is related to headaches and one is found, it should corrected immediately.

Depends on the type: Av fistula is a general term for a connection between an artery and vein. This can be intentionally created by a vascular surgeon to provide for hemodialysis access. It can be a result of trauma or it can be something you're born with as well. The purpose of ligating an av fistula thus depends on the exact type of fistula, but it generally serves to break that artery-vein connection.