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Intramural aortic dissection

N D Wambeek1, D C Cameron, A Holden

  • 1Department of Radiology, Royal Perth Hospital, Western Australia, Australia.

Australasian Radiology
|November 1, 1996
PubMed
Summary
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Intramural aortic dissection, characterized by intramural hematoma without a false lumen, is often missed. Computed tomography (CT) is the primary diagnostic tool for this condition.

Area of Science:

  • Cardiovascular Imaging
  • Radiology
  • Vascular Surgery

Background:

  • Intramural aortic dissection (IAD) is a recently described condition.
  • It is characterized by intramural hematoma without a patent false lumen.
  • The etiology and imaging findings of IAD remain controversial and often subtle.

Purpose of the Study:

  • To present 10 cases of intramural aortic dissection.
  • To discuss the radiological features and potential etiologies of IAD.
  • To evaluate the diagnostic utility of various imaging modalities for IAD.

Main Methods:

  • Retrospective review of 10 cases diagnosed with IAD.
  • Analysis of radiological findings on computed tomography (CT), magnetic resonance imaging (MRI), and transesophageal echocardiography (TOE).

Related Experiment Videos

  • Discussion of imaging features, including the hyperdense rim sign on non-contrast CT.

    • Main Results:

    • All 10 cases presented with intramural hematoma and no patent false lumen.
    • The key finding was a hyperdense rim in the aortic wall on non-contrast CT.
    • Delayed diagnosis occurred in one case with MRI; another case showed delayed aortic ulcer development.

    Conclusions:

    • Intramural aortic dissection diagnosis can be subtle and frequently overlooked.
    • Non-contrast CT is the primary diagnostic test for IAD due to its advantages over MRI and TOE.
    • Further research is needed to clarify the etiology and optimal management of IAD.