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Midterm change of descending aortic false lumen after repair of acute type I dissection

Kay-Hyun Park1, Cheong Lim, Jin Ho Choi

  • 1Department of Thoracic and Cardiovascular Surgery, Seoul National University Bundang Hospital, Bundang, Korea. drkhpark@yahoo.co.kr

The Annals of Thoracic Surgery
|December 23, 2008
PubMed
Abstract

Insights

Persistent false lumen in the descending aorta after acute type I dissection repair can lead to poor outcomes. This study found that early false lumen characteristics predict midterm changes, including significant descending aortic dilation in nearly half of patients.

Area of Science:

  • Cardiovascular Surgery
  • Thoracic Aortic Disease
  • Medical Imaging

Background:

  • Persistent false lumen in the descending aorta after acute type I dissection repair is linked to adverse long-term prognosis.
  • Understanding midterm changes in the descending aortic false lumen is crucial for patient outcomes.

Purpose of the Study:

  • To investigate the midterm changes of the descending aortic false lumen after surgical repair of acute type I dissection.
  • To identify predictors of descending aortic dilation and false lumen regression.

Main Methods:

  • Review of postoperative computed tomographic (CT) images from 122 patients who underwent repair for acute type I dissection.
  • Comparison of early and last follow-up CT images to assess false lumen patency, width, and maximal aortic diameter.
  • Analysis of changes in both thoracic and abdominal segments of the descending aorta.

Main Results:

  • The descending aorta dilated by 1 cm or more in 47.5% of patients within a mean follow-up of 33.6 months.
  • Dilatation was more common in the thoracic aorta and associated with patent/wide false lumens, larger aortic diameter, Marfan syndrome, younger age, and male sex.
  • Thoracic false lumen shrinkage occurred in 29.5% of patients, particularly those with initially thrombosed and narrow false lumens.

Conclusions:

  • Early postoperative false lumen characteristics are predictive of both midterm aortic dilation and regression.
  • A significant proportion of patients experience descending aortic dilation after repair, but some also show false lumen shrinkage.
  • These findings provide essential control data for evaluating novel surgical strategies for acute type I dissection.

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