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Coronary atherosclerotic lesions in patients with a ruptured abdominal aortic aneurysm

Atsuko Nakayama1, Hiroyuki Morita, Akihiko Hamamatsu

  • 1Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.

Heart and Vessels
|March 8, 2014
PubMed

Insights

Ruptured abdominal aortic aneurysm (AAA) patients show higher coronary stenosis rates than those undergoing emergency repair, indicating survival bias. Significant left main trunk stenosis is more common in ruptured AAA cases, suggesting new clinical insights.

Area of Science:

  • Cardiovascular Medicine
  • Vascular Surgery
  • Pathology

Background:

  • Abdominal aortic aneurysm (AAA) rupture is a critical condition.
  • Coronary artery disease (CAD) prevalence in ruptured AAA patients is debated.
  • Survival bias may influence observed CAD rates in emergency AAA repair.

Purpose of the Study:

  • To compare coronary findings in autopsy cases of ruptured AAA with patients undergoing AAA repair.
  • To investigate the association between CAD and ruptured AAA.
  • To explore the prevalence of coronary left main trunk stenosis in ruptured vs. unruptured AAA.

Main Methods:

  • Retrospective analysis of 185 autopsy cases with ruptured AAA.
  • Comparison with 1,056 patients undergoing AAA repair.
  • Assessment of coronary stenosis and left main trunk stenosis.

Main Results:

  • Autopsy cases with ruptured AAA had significantly higher rates of significant coronary stenosis than emergency repair patients.
  • This suggests survival bias in emergency repair cases.
  • Significant coronary left main trunk stenosis was more frequent in ruptured AAA cases.

Conclusions:

  • Observed low CAD prevalence in emergency AAA repair is likely due to survival bias.
  • Ruptured AAA is associated with a higher frequency of significant coronary left main trunk stenosis.
  • Further prospective studies are needed to confirm findings and elucidate pathophysiological links.

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