Cases reported • Leriche's Syndrome

1/5. Intraoperative acute occlusion of aortic bifurcation during extracorporeal circulation.

A 36-year-old male patient showed a significant decrease of arterial pressure in the lower extremities during coronary artery bypass grafting (CABG) with extracorporeal circulation (ECC). Arterial pressure measured in the femoral artery fell to 10-20 mmHg at the end of ECC, whereas in the upper extremities arterial pressure levels were normal. At the end of the surgery a complete ischemia of both lower extremities was observed. We suspected leriche's syndrome and performed a successful aortic embolectomy through bilateral femoral arteriotomies immediately. An insufficient anticoagulation could be excluded by prolonged "activated clotting time" (ACT), therefore we presumed that the source of embolus was a small aneurysm of the left ventricle. The shape and superficial structure of the extracted embolus, which was partly covered with endocardium, confirmed our suspicion. No complications occurred throughout the postoperative period. On the 10th postoperative day, the patient left our department for postoperative rehabilitation with a normal perfusion of the lower extremities.

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2/5. Internal mammary artery perfusing leriche's syndrome in association with significant coronary arteriosclerosis: four case reports and review of literature.

Four cases of collateral perfusion of a lower extremity by way of an internal mammary artery in the presence of leriche's syndrome are described. Angiographic documentation preceding coronary artery bypass grafting prevented an acutely ischemic leg in two of the cases.

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3/5. Vascular echinococcosis.

Three patients with arterial echinococcosis presented with chronic or acute arterial occlusion. One case diagnosed as leriche's syndrome was found at surgery to have aortic occlusion caused by hydatid cysts; arterial reconstruction was performed by aortoiliac interposition of a woven Dacron vascular graft. In the other 2 cases presenting with acute femoral or brachial artery occlusion, embolectomy revealed hydatid cysts as the cause of occlusion.

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4/5. Gluteal necrosis after acute ischemia of the internal iliac arteries.

ligation of the internal iliac artery mostly remains without consequences because of the well established collateral network. In patients with compromised collateral circulation however, acute interruption of both hypogastric arteries during aorto-iliac surgery or transluminal embolisation can lead to necrosis of the gluteal muscles and other adjacent organs (rectum, bladder, lumbosacral plexus). Experience with 3 similar cases after aorto-iliac surgery demonstrates two main intraoperative mechanisms: 1. Embolisation, 2. Ligature of both internal iliac arteries in patients with compromised arteriosclerotic collaterals. Despite of adequate therapy, mortality is over 70%. The most important feature during aorto-iliac operations is to preserve at least one internal iliac artery by either reimplantation of the main stem or by an additional bypass to this artery.

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5/5. Intraoperative continuous hemofiltration for metabolic management in acute aortoiliac occlusion.

Acute aortoiliac occlusion, or leriche's syndrome, carries a risk of the development of severe ischemia-reperfusion injury, characterized by electrolyte and acid-base balance disturbances. These injuries are often fatal, because of the rapid deterioration of multiple organ systems. We present a case in which we intraoperatively and postoperatively treated hyperkalemia and metabolic acidosis by high-volume, continuous, veno-venous hemofiltration, which is a recently developed form of continuous renal replacement therapy.

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