Aortic neck dilatation and endograft migration are correlated with self-expanding endografts

Ilias Dalainas, Giovanni Nano, Paolo Bianchi, Fabio Ramponi, Renato Casana, Giovanni Malacrida, Domenico G. Tealdi

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To compare self-expanding and balloon-expandable stent-grafts in terms of aortic neck dilatation and endograft migration. Method: Two-hundred and forty-two patients (178 men; mean age 68 years, range 56-91) underwent elective endovascular repair of abdominal aortic aneurysm. Two-hundred self-expanding (115 Excluder, 48 Endologix, 23 Vanguard, 10 Anaconda, and 4 Talent) and 42 balloon-expandable (Lifepath) endografts were used. All patients underwent contrast-enhanced computed tomography (CT) prior to the intervention, at 1, 3, and 6 months after the procedure, and annually thereafter. Comparison was made between the first and the last follow-up CT scans. Results: Fifty-five (27.5%) of the 200 patients treated with self-expanding endografts had aortic neck dilatation compared to only 3 (7.1%) of the 42 patients treated with balloon-expandable endografts (p=0.023). Forty-nine (24.5%) patients in the self-expanding group versus only 3 (7.1%) patients of the balloon-expandable group presented with endograft migration (p=0.034); all had dilated necks. The difference between the means of neck dilatation for the Lifepath balloon-expandable stent-graft and the Excluder self-expanding endoprosthesis was statistically significant (p=0.011, 95% CI 0.07 to 0.91). Conclusion: Aortic neck dilatation following endovascular AAA repair appears to be correlated with self-expanding endografts, which may contribute to a higher incidence of graft migration compared to that occurring with balloon-expandable endografts.

Original languageEnglish
Pages (from-to)318-323
Number of pages6
JournalJournal of Endovascular Therapy
Volume14
Issue number3
DOIs
Publication statusPublished - Jun 2007

Keywords

  • Abdominal aortic aneurysm
  • Balloon-expandable stent-graft
  • Endovascular repair
  • Migration
  • Neck dilatation
  • Self-expanding stent-graft

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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