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Infrarenal aortic dilatation less than 4 cm is not unusual in patients with aortoiliac occlusive disease

M Matsushita1, N Nishikimi, T Sakurai

  • 1First Department of Surgery, Nagoya University, School of Medicine, Nagoya, Japan.

International Angiology : a Journal of the International Union of Angiology
|October 18, 2002
PubMed

Insights

Atherosclerosis may contribute to aortic dilatation in patients with atherosclerotic aortoiliac occlusive disease (AIOD). Infrarenal aortic enlargement was linked to intraluminal thrombus and less calcification in AIOD patients.

Area of Science:

  • Vascular Surgery
  • Cardiovascular Medicine
  • Radiology

Background:

  • The link between atherosclerosis and abdominal aortic aneurysm (AAA) is debated.
  • Atherosclerotic aortoiliac occlusive disease (AIOD) is a common manifestation of atherosclerosis.
  • Infrarenal aortic aneurysm development requires further investigation.

Purpose of the Study:

  • To assess the incidence of aortic dilatation in patients with AIOD.
  • To investigate the role of aortic wall calcification and intraluminal thrombus in aneurysm development.
  • To clarify the relationship between atherosclerosis and infrarenal aortic dilatation.

Main Methods:

  • Retrospective study of 40 patients undergoing surgery for AIOD.
  • Preoperative contrast-enhanced computed tomography (CT) used for evaluation.
  • Measurements included infrarenal aortic diameter, calcification, and intraluminal thrombus.

Main Results:

  • 40% of patients exhibited infrarenal aortic dilatation (> left renal vein level).
  • 12.5% of patients had significant aortic enlargement (≥50%).
  • Aortic diameter correlated negatively with calcification and positively with thrombus.

Conclusions:

  • Aortic dilatation (<4 cm) is common in AIOD patients, suggesting an association with atherosclerosis.
  • Atherosclerotic plaques with abundant thrombus and minimal calcification may predispose to aortic enlargement.
  • Further research is needed to fully elucidate the pathogenesis of AAA in the context of AIOD.
Abstract

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