Vascular bypass revision is a surgical procedure used to revise or replace a previously placed vascular bypass graft that has become blocked, narrowed, or failed. The procedure involves either replacing the graft or using other techniques, such as angioplasty or stenting, to restore blood flow and ensure that the bypass remains functional.

This surgery is often necessary for patients who experience recurrent symptoms or complications after initial bypass surgery, helping to improve circulation and prevent further vascular issues.