The Authors report on two cases of acute aortic occlusion, related to cardiac embolism and thrombosis of aortic aneurysm. The singularity of the etiology adds interest to a pathology which is already, in itself, serious and complex and which requires the intervention of the surgeon, anesthesiologist-reanimator, cardiologist, and nephrologist. The diagnosis is mainly clinical. The use of Doppler and CT scan provide to achieve the diagnosis. Surgical treatment included transfemoral embolectomy, with a Fogarty catheter, in the patient with acute aortic occlusion related to cardiac embolism, and aortobifemoral bypass, in the other patient, affected by thrombosis of aortic aneurysm.