PubMed · 11385154
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
E B Diethrich. 2001. AAA stent grafts: current developments.. https://pubmed.ncbi.nlm.nih.gov/11385154/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Explore the source record for details and available documents.
Aortic aneurysm may develop after surgery for coarctation of aorta especially patch aortoplasty. The size of patch and of adjacent native aortic wall was analyzed to determine whether aortic dilatation represents a true aneurysm. Electron beam tomography (EBT) was done on 19 patients, three months to 17.5 years after patch aortoplasty. Tomograms of aorta were obtained in 6-mm slices, and maximal cross-sectional area was digitized to obtain: total circumference (Ct), patch component (Cp), and aortic wall component (Cw). Ct, Cp, and Cw were normalized to the circumference of distal aorta (Cda) as: isthmus/distal aorta (Ct/Cda), patch segment/distal aorta (Cp/Cda), wall segment/distal aorta (Cw/Cda). Ct/Cda ranged from 109% to 260%. In 12 patients (group A), it varied from 168% to 260%; and in seven (group B), 109% to 133%. There was strong correlation (r = 0.92) between Ct/Cda and Cp/Cda. Ct/Cda, Cp/Cda, and Cp/Cw were higher in group A than B (p <0.001) but Cw/Cda did not differ. Cw/Cda was greater than the coarctation/distal aorta diameter ratios of preoperative angiograms, consistent with accelerated aortic wall growth postsurgery. No definite aneurysm was seen. Localized dilatation of aorta following patch aortoplasty in children is primarily due to a large synthetic patch and, partly, to increased aortic wall growth. Serial EBT or magnetic resonance imaging is indicated to monitor aortic wall growth and occurrence of aneurysm.
Extracranial and intracranial angioplasty and stenting of the cerebral vessels are being performed more frequently. One clinical trial demonstrated equivalent outcomes between extracranial carotid angioplasty and carotid endarterectomy, but the results in both groups were suboptimal. Concerns remain about the iatrogenic stroke rate after angioplasty, especially for asymptomatic patients. Angioplasty, with or without stent placement, also offers a potential new therapeutic approach for patients with intracranial stenosis and vertebrobasilar lesions, although these procedures have been performed in uncontrolled fashion.