Ischemia is an important cause of non healing of ulcer in Diabetic foot. Ischemia promotes spread of infection and often results in limb loss. Contrary to the common belief that  non healing ulcers and gangrene, non healing of minor amputations are due to disease of arterioles–the so called small vessel disease, macro vascular occlusion of leg arteries due to atherosclerosis has been established as the cause of limb ischemia. Revascularization of the foot helps in achieving ulcer healing and prevention of amputation.