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Descending aortic aneurysmal changes following surgery for acute DeBakey type I aortic dissection

Joon Bum Kim1, Chee-Hoon Lee, Taek Yeon Lee

  • 1Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|May 8, 2012
PubMed

Insights

Large proximal descending aorta diameter after aortic dissection surgery predicts aneurysm risk. Early detection and potential adjunctive procedures are crucial for preventing late aneurysm formation.

Area of Science:

  • Cardiovascular Surgery
  • Vascular Surgery
  • Aortic Disease

Background:

  • Acute DeBakey type I aortic dissection requires surgical intervention.
  • Post-operative surveillance is essential to monitor for complications.
  • Aneurysmal changes in the descending aorta are a known complication.

Purpose of the Study:

  • To identify risk factors for descending aortic aneurysms after surgery for acute type I aortic dissection.
  • To evaluate the predictive value of initial computed tomography (CT) measurements.
  • To inform strategies for preventing late aortic complications.

Main Methods:

  • Retrospective analysis of 129 patients who underwent surgery for acute type I aortic dissection (2000-2010).
  • Follow-up CT scans at least 6 months post-surgery to assess for aortic aneurysms (diameter >55 mm).
  • Cox regression analysis to determine independent risk factors for aneurysm development.

Main Results:

  • Aortic dilatation occurred in 17.8% of patients; 14.7% developed proximal descending aortic aneurysms.
  • Initial proximal descending aorta diameter was the sole significant independent predictor of aneurysm formation (HR 1.12, P=0.014).
  • A preoperative diameter >40 mm was associated with significantly lower 5-year freedom from aortic aneurysm rates (55.6% vs 84.4%, P=0.001).

Conclusions:

  • The proximal descending aorta is the primary site for aneurysm development post-aortic dissection surgery.
  • Initial CT measurement of proximal descending aorta diameter is a key predictor of late aneurysm.
  • Consideration of adjunctive procedures alongside aortic replacement may be necessary to mitigate late aneurysm risk.
Abstract

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