Rupture of an Aneurysmal Arteriovenous Fistula in an In Situ Vein Bypass

We report a case of rupture of an aneurysm on a residual arteriovenous fistula, five years after a femoral to posterior tibial artery bypass for critical ischemia of the right lower limb. This is a 48-year-old patient admitted to the emergency room for hemorrhagic shock following a rupture of a varicose bundle at the level of the posterior surface of the right thigh. The CT angiography confirmed the presence of multiple residual arteriovenous fistulas, which became aneurysmal. The exclusion of the latter by ligature-section made it possible to stop the hemorrhage while preserving the bypass.