[Chronic traumatic arteriovenous fistulae (author's transl)].

In two patients with femoral arterio-venous fistulae angiography could show arterial and venous collaterals with differing circulation phases. When angiography shows retrograde flow in the artery distal to the fistula, the volume of arterial collateral circulation is unrelated to the peripheral blood-supply. Venous collateral circulation has to be included in the fistular circulation.