Effects of the patent false lumen on the long-term outcome of type B acute aortic dissection

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Koichi Akutsu1, Jun Nejima, Kaname Kiuchi

  • 1Intensive and Coronary Care Unit, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan.

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|August 7, 2004
PubMed

Insights

A patent false lumen in type B aortic dissection significantly increases the risk of dissection-related death and events. Dilated aortic segments at the distal arch are also a risk factor for these adverse outcomes.

Area of Science:

  • Cardiovascular Medicine
  • Thoracic Surgery
  • Medical Imaging

Background:

  • Type B aortic dissection (TBAD) is a life-threatening condition.
  • Management strategies for TBAD vary, especially for patients not undergoing acute surgery.
  • The prognostic significance of false lumen patency in medically managed TBAD requires further elucidation.

Purpose of the Study:

  • To compare the clinical outcomes of medically treated patients with type B aortic dissection based on false lumen patency.
  • To identify factors influencing long-term outcomes in patients with patent false lumens.

Main Methods:

  • Retrospective review of CT scans from 138 patients with acute type B aortic dissection.
  • Analysis of 110 medically treated survivors, categorized into thrombosed (n=62) and patent (n=48) false lumen groups.
  • Follow-up up to 10 years, assessing all-cause mortality, dissection-related death, and dissection-related events.

Main Results:

  • False lumen patency was an independent risk factor for dissection-related death (HR=5.6) and events (HR=7.6).
  • Distal aortic arch dilation was a risk factor for adverse outcomes in the patent false lumen group (death HR=13.6, events HR=2.6).
  • False lumen patency did not significantly impact all-cause mortality (HR=1.2).

Conclusions:

  • False lumen patency is a significant independent prognostic factor in type B aortic dissection.
  • Aortic segment dilation at the distal arch is a critical risk factor for adverse outcomes in patients with patent false lumens.
Abstract

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