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Query: UMLS:C0162871 (abdominal aortic aneurysm)
 8,664 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In a retrospective study 42 patients with asymptomatic popliteal artery aneurysm were followed without surgery to identify variables predicting the risk of complications. The mean aneurysm size was 3.1 cm. Abnormal ankle pulses were found in 18 of the 42 limbs in which an asymptomatic popliteal aneurysm was present. Follow-up was complete (mean 6.2 years). Twenty-five patients developed complications at a mean observation time of 18 months. As a result three lost the limb, eight had claudication, two needed a fasciotomy and one had a peroneal nerve palsy. The cumulative risk of developing complications during follow-up was 24 per cent at 1 year, rising to 68 per cent at 5 years. Patients with absent ankle pulses and those already operated on for abdominal aortic aneurysm proved to be especially at risk. Patient survival appeared to be normal for the period of observation. It is concluded that asymptomatic aneurysm of the popliteal artery is a potentially dangerous lesion that may justify elective surgery; it is possible to select those at highest risk.
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PMID:Asymptomatic popliteal aneurysm: elective operation versus conservative follow-up. 782 Apr 86

A 37-year-old patient with back pain and somatomegaly was found to have a penetrating aneurysm of sections IV and V of the abdominal aorta. Results of a family history and clinical examination confirmed suspicions of Marfan's syndrome. Further angiologic studies depicted an aneurysmatic dilatation of the left popliteal artery. Aneurysmatic dilatations are primarily located in sections I and II of the thoracic aorta, whereas aneurysms in sections IV and V are much rarer. The rare combination of an abdominal aortic aneurysm and left-sided popliteal aneurysm accompanying Marfan's syndrome is presented.
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PMID:Rare manifestation of abdominal aortic aneurysm and popliteal aneurysm in a patient with Marfan's syndrome: a case report. 1166 74

This study reviews our experience with duplex ultrasound arterial mapping (DUAM) for preoperative evaluation in 466 patients (262 men) who underwent 485 lower extremity revascularization procedures from January 1, 1998 to May 30, 2001. Preoperative imaging consisted of DUAM alone in 449 procedures and DUAM and contrast angiography (CA) in 36. An attempt to image from the distal aorta to the pedal arteries was made in all the patients. The selection of optimal inflow and outflow bypasses anastomotic sites was based on a schematic drawing following DUAM examination. Inflow disease was also assessed by intraoperative pressure gradient (IPG) between the distal anastomosis and radial arteries, and completion arteriography of the runoff vessels was obtained, which was correlated with the preoperative findings. Indications for surgery were severe claudication in 91 (19%) limbs, tissue loss in 197 (40%), rest pain in 113 (23%), acute ischemia in 46 (10%), popliteal aneurysm in 18 (4%), superficial femoral artery aneurysm in 1, abdominal aortic aneurysm with claudication in 1, and failing graft in 18 (4%). Age ranged from 30 to 97 years (mean 72 +/- 12 (SD) years) and risk factors such as diabetes, hypertension, use of tobacco, coronary artery disease, and end-stage renal disease were present in 45%, 45%, 44%, 44%, and 13% of the patients, respectively. One hundred twenty-one (25%) limbs had at least 1 previous ipsilateral revascularization. The mean DUAM time was 66 +/- 20 (SD) min (30-150 min). Additional preoperative imaging was deemed necessary in 36 cases due to extensive ulcers, edema, severe arterial wall calcification, and very poor runoff. The distal anastomosis was to the popliteal artery in 173 cases and to the tibial and pedal arteries in 255. Inflow procedures to the femoral arteries, embolectomy, thrombectomy, balloon angioplasty, and patch angioplasty accounted for the remaining 57 cases. Overall, 6-, 12-, and -24- month secondary patency rates were 86%, 80%, and 66%, respectively. This early experience shows that high-quality arterial ultrasonography performed by a highly skilled vascular technologist may represent an alternative to conventional arteriography for patients in need of lower extremity revascularization. Because of limitations inherent to the technique and very poor runoff observed on ultrasonographic examination, additional preoperative imaging procedure's are needed for certain patients.
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PMID:Lower extremity revascularization without preoperative contrast arteriography: experience with duplex ultrasound arterial mapping in 485 cases. 1190 14

Popliteal artery aneurysms are the hallmark of peripheral aneurysms, accounting for 70%, and are commonly bilateral in 50% to 75% of patients. The prevalence and incidence of popliteal artery aneurysms are not precisely known. The presence of a popliteal aneurysm is a marker of risk to limb and life because 33% to 43% are associated with an abdominal aortic aneurysm. Ligation and bypass reconstruction has long been the "gold standard" for the treatment of popliteal aneurysms. Recently, endoluminal repair with a percutaneously delivered stent-graft has become a valid alternative to open repair. In this study, we illustrate two cases of a total of four patients with popliteal artery aneurysms treated with percutaneous stent graft placement and discuss overall management of these aneurysms. The other two patients had a successful early outcome (30 days), but long-term follow-up is still lacking.
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PMID:Percutaneous transfemoral endovascular repair of popliteal artery aneurysms. 1833 81

True aneurysm formation in arterialized autologous veins is an unusual complication. A saccular aneurysmal degeneration of 53 mm (maximal diameter) of a saphenous vein graft inserted for repair of a popliteal aneurysm, four years after implantation, is reported. The patient (with prior history of abdominal aortic aneurysm) had been initially treated through a posterior approach. A new saphenous vein bypass grafting (medial approach) was performed. Histological examination revealed myointimal fibrosis, medial degeneration and inflammation. In spite of the widespread use of the autologous saphenous vein as an arterial substitute, this complication is extremely rare and its etiology remains unclear. Atherosclerosis is considered to be the main cause of aneurysm formation in vein grafts, but current data suggest that additional etiopathogenic factors should be further investigated. We note the rarity of this finding and review the literature for true aneurysm formation within vein grafts used for bypass procedures.
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PMID:Aneurysmal degeneration of a saphenous vein graft following the repair of a popliteal aneurysm: case report and literature review. 2392 43

Abdominal aortic and popliteal artery aneurysms are vascular diseases which show massive degeneration, weakening of the vascular wall and loss of the vascular tissue functionality. They are driven by inflammatory, hemodynamical factors and biological alterations that may lead, in the case of an abdominal aortic aneurysm, to sudden and dangerous ruptures of the arteries. Here, human aortic and popliteal aneurysm tissues were obtained during surgical repair, and studied by synchrotron radiation X-ray scanning microdiffraction and small-angle scattering, to investigate the microcalcifications present in the tissues. Data collected during the experiments were transformed into quantitative microscopy images through the combination of statistical approaches and crystallographic methods. As a result of this multi-step analysis, microcalcifications, which are markers of the pathology, were classified in terms of chemical and structural content. This analysis helped to identify the presence of nanocrystalline hy-droxy-apatite and microcrystalline cholesterol, embedded in myofilament, and elastin-containing tissue with low collagen content in predominantly nanocrystalline areas. The generality of the approach allows it to be transferred to other types of tissue and other pathologies affected by microcalcifications, such as thyroid carcinoma, breast cancer, testicular microli-thia-sis or glioblastoma.
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PMID:X-ray scanning microscopies of microcalcifications in abdominal aortic and popliteal artery aneurysms. 3086 24