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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Related Experiment Video

Updated: Mar 29, 2026

Novel and Innovative Hybrid Technique for Type A Aortic Dissection
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False positive computed tomographic angiography for Stanford type A aortic dissection.

Murad F Bandali1, Muhammed A Hatem1, Jehangir J Appoo2

  • 1Department of Diagnostic Radiology, University of Calgary, Calgary, Alberta, Canada.

Radiology Case Reports
|December 10, 2015
PubMed
Summary

A false-positive computed tomographic angiography (CTA) misdiagnosed aortic dissection due to contrast enhancement issues. Definitive surgical inspection confirmed no dissection, highlighting CTA limitations in diagnosing acute aortic dissection.

Keywords:
AortaComputed tomographyDissectionFalse positiveStanford A

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Area of Science:

  • Cardiovascular Imaging
  • Diagnostic Accuracy
  • Thoracic Surgery

Background:

  • Computed tomographic angiography (CTA) is the standard for ruling out acute aortic dissection.
  • CTA is not infallible and can produce false-positive results.
  • This case highlights potential pitfalls in CTA interpretation for aortic dissection.

Observation:

  • A 52-year-old male presented with shortness of breath and severe hypertension.
  • Initial CTA suggested Stanford Type A aortic dissection with a thrombosed false lumen.
  • Intra-operative imaging and surgical inspection ruled out aortic dissection.

Findings:

  • The false-positive CTA was attributed to non-uniform arterial contrast enhancement.
  • Unrecognized biventricular dysfunction caused the atypical contrast enhancement pattern.
  • Repeat CTA confirmed the absence of dissection, showing normal aortic anatomy.

Implications:

  • Technical factors and patient-specific physiological conditions can lead to CTA misdiagnosis.
  • Transesophageal echocardiography (TEE) and surgical inspection are crucial for confirming aortic dissection.
  • Accurate diagnosis of acute aortic dissection requires careful correlation of imaging findings with clinical presentation and intra-operative data.