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Related Experiment Videos

Transient global amnesia -- not always a benign process.

Y Lampl1, M Sadeh, M Lorberboym

  • 1Department of Neurology, Edith Wolfson Medical Center, Holon, Israel. y_lampl@hotmail.com

Acta Neurologica Scandinavica
|July 10, 2004
PubMed
Summary
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Transient global amnesia (TGA) is usually benign. However, recurrent TGA patients may show persistent brain hypoperfusion on SPECT scans, suggesting a non-benign form.

Area of Science:

  • Neurology
  • Neuroimaging

Background:

  • Transient global amnesia (TGA) is an episodic memory dysfunction.
  • TGA is generally considered a benign neurological disorder.
  • Brain perfusion SPECT scans are abnormal during acute TGA and normalize with memory recovery.

Purpose of the Study:

  • To investigate brain perfusion patterns in patients with recurrent TGA.
  • To compare SPECT findings in first-time TGA versus recurrent TGA.

Main Methods:

  • Sixteen patients with TGA underwent initial brain perfusion SPECT during acute attacks.
  • A second SPECT scan was performed after 3 months for all patients.
  • A third SPECT scan was conducted after 1 year for patients with recurrent TGA and persistent abnormalities.

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Main Results:

  • All patients showed hypoperfusion during the acute TGA stage.
  • SPECT scans normalized after 3 months in patients with their first TGA episode.
  • Three patients with recurrent TGA exhibited persistent abnormal brain perfusion at 3 months and 1 year.

Conclusions:

  • Normal brain perfusion is expected within 3 months after a first TGA episode.
  • Recurrent TGA patients may present with persistent focal hypoperfusion.
  • Persistent hypoperfusion in recurrent TGA suggests a potentially non-benign condition or different etiology.