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Aortic aneurysm dissection causing V/Q mismatch.

S Tiu1, P J Toth, H J Banner

  • 1Department of Radiology, NYU Medical Center/Bellevue Hospital, New York.

Clinical Nuclear Medicine
|March 1, 1988
PubMed
Summary
This summary is machine-generated.

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Aortic aneurysm dissection can cause unilateral lung mismatch on ventilation/perfusion scans. This finding suggests pulmonary embolism is not the only cause, necessitating further clinical evaluation for accurate diagnosis.

Area of Science:

  • Radiology
  • Cardiovascular Surgery
  • Pulmonary Medicine

Background:

  • Ventilation/perfusion (V/Q) lung scans are crucial for diagnosing pulmonary embolism (PE).
  • Unilateral V/Q mismatch typically suggests PE, but other etiologies exist.
  • Aortic aneurysm dissection is a rare but critical condition affecting the aorta.

Observation:

  • A case presented with unilateral lung mismatch on a V/Q scan.
  • The mismatch was attributed to aortic aneurysm dissection, not PE.
  • This highlights a less common cause of V/Q scan abnormalities.

Findings:

  • Aortic aneurysm dissection can mimic the V/Q scan findings of pulmonary embolism.
  • The study emphasizes that unilateral lung mismatch is not pathognomonic for PE.

Related Experiment Videos

  • Accurate diagnosis requires considering the broader clinical context.

    • Implications:

    • Clinicians should consider aortic pathology in cases of unexplained unilateral V/Q mismatch.
    • Pulmonary angiography remains the gold standard for diagnosing PE.
    • This case broadens the differential diagnosis for V/Q scan abnormalities, improving diagnostic accuracy.