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Imaging of thoracic aortic dissection

F H Vu1, N Young, Y S Soo

  • 1Department of Radiology, Westmead Hospital, NSW, Australia.

Australasian Radiology
|August 1, 1994
PubMed
Summary
This summary is machine-generated.

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See all related articles

Diagnosing acute thoracic aortic dissection quickly is vital. While chest X-rays show abnormalities, trans-oesophageal echocardiography (TOE) is being assessed as a prime imaging tool due to CT scan limitations.

Area of Science:

  • Cardiology
  • Radiology
  • Medical Imaging

Background:

  • Acute thoracic aortic dissection presents a significant mortality risk if not promptly diagnosed.
  • Accurate and rapid diagnosis is crucial for improving patient outcomes.
  • Various imaging modalities are employed for diagnosis, each with varying efficacy.

Purpose of the Study:

  • To retrospectively evaluate the diagnostic utility of multiple imaging techniques for acute thoracic aortic dissection.
  • To compare the sensitivity and specificity of chest X-ray, CT scanning, aortography, MRI, TTE, and TOE.
  • To inform the selection of optimal imaging strategies for this critical condition.

Main Methods:

  • Retrospective analysis of 42 patients with a clinical diagnosis of thoracic aortic dissection between 1988 and 1993.

Related Experiment Videos

  • Review of imaging data including chest X-ray, computed tomography (CT) scanning, aortography, magnetic resonance imaging (MRI), trans-thoracic echocardiography (TTE), and trans-oesophageal echocardiography (TOE).
  • Correlation of imaging findings with surgical and autopsy confirmation of dissection.

    • Main Results:

    • Chest X-rays revealed abnormalities (widened mediastinum/dilated aorta) in all 19 patients with confirmed dissection (surgery/autopsy).
    • CT scans identified dissection in 9 of 12 patients but correctly classified the type in only five.
    • Aortography, TTE, MRI, and TOE demonstrated high accuracy in depicting dissection and type in the limited number of patients studied.

    Conclusions:

    • Chest X-ray can indicate potential dissection, but advanced imaging is necessary for definitive diagnosis.
    • CT scanning showed limitations in sensitivity and type classification for thoracic aortic dissection.
    • Trans-oesophageal echocardiography (TOE) is emerging as a potentially superior primary imaging modality for pre-surgical assessment.