Midterm changes in aortic aneurysm morphology after endovascular repair

Research output: Contribution to journalArticle

Abstract

PURPOSE: To study midterm changes in aortic aneurysm morphology after endovascular aneurysm repair. METHODS: Of 94 patients with abdominal aortic aneurysms (AAAs) treated with endografts between November 1993 and August 1998, 84 were available for follow-up. Patients were evaluated preoperatively by spiral computed tomography (CT) and aortography; in follow-up, spiral CT scanning was performed at 1, 3, and 6 months and semiannually thereafter. Measurements of the aneurysm neck diameter, maximum aneurysm diameter, and the distance from the lowermost renal artery to the aortic bifurcation were made preoperatively and in follow-up. RESULTS: Mean follow-up was 17.5 +/- 1.1 months; 56 (67%) patients were followed for 1 year and 28 (33%) for > or = 2 years. There was a median 2-mm increase (interquartile range [IQR] 0 to 3) in neck diameter at 18 months. However, a > or = 3-mm increase was seen in 18 (46%) of 39 patients examined at 18 months (median 4 mm, IQR 3 to 4, p = 0.0001). The maximum AAA diameter decreased by 9 mm (IQR 4 to 16, p = 0.0003) at 24 months, but after 18 months, no further interval decrease was seen. Aneurysms with a persistent endoleak showed either increasing or unchanged AAA diameters. There was no change in the renal artery to bifurcation distance. CONCLUSIONS: The infrarenal aortic neck appears to dilate after AAA endografting, but only in a subset of patients. Shrinkage of aneurysms after successful stent-grafting seems to stop after 18 months, implying that the only indication of late failure in the absence of endoleak might be aneurysm enlargement. Graft-related endoleaks are often associated with an increase in aneurysm diameter.

Details

Authors
  • Tim Resch
  • Krassi Ivancev
  • J Brunkwall
  • Nikolaj Nirhov
  • Martin Malina
  • Bengt Lindblad
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Cardiac and Cardiovascular Systems

Keywords

  • endografts, proximal neck, AAA diameter, spiral computed tomography, endoleak
Original languageEnglish
Pages (from-to)279-285
JournalJournal of Endovascular Therapy
Volume7
Issue number4
Publication statusPublished - 2000
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Unit for Clinical Vascular Disease Research (013242410), Emergency medicine/Medicine/Surgery (013240200), Medical Radiology Unit (013241410)