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Related Experiment Videos

Transient global amnesia: a clinical and sonographic study.

N Maalikjy Akkawi1, C Agosti, G P Anzola

  • 1Department of Neurology, Civil Hospital of Brescia, I-25100 Brescia, Italy. maakna@yahoo.com

European Neurology
|February 14, 2003
PubMed
Summary

Transient global amnesia (TGA) may be linked to cerebral venous hypertension from jugular valve incompetence, not paradoxical embolism via patent foramen ovale (PFO). Vascular risk factors were less common in TGA patients than in transient ischemic attack (TIA) patients.

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Area of Science:

  • Neurology
  • Vascular Medicine
  • Diagnostic Imaging

Background:

  • The underlying causes of transient global amnesia (TGA) remain unclear.
  • Investigating potential risk factors, including vascular issues, patent foramen ovale (PFO), and jugular venous flow, is crucial for understanding TGA.

Purpose of the Study:

  • To identify potential risk factors associated with transient global amnesia (TGA).
  • To evaluate the role of vascular risk factors, patent foramen ovale (PFO), and retrograde jugular venous flow in TGA pathogenesis.

Main Methods:

  • A study involving 138 participants: 48 TGA patients, 42 age-matched transient ischemic attack (TIA) patients, and 48 controls.
  • Patent foramen ovale (PFO) assessment using contrast transcranial duplex sonography.
  • Retrograde jugular venous flow evaluation via air contrast ultrasound venography (ACUV) to detect jugular valve incompetence.

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Main Results:

  • Transient global amnesia (TGA) and control groups exhibited a lower prevalence of vascular risk factors compared to transient ischemic attack (TIA) patients.
  • No significant difference in the prevalence of patent foramen ovale (PFO) was observed across the TGA, TIA, and control groups.
  • Jugular valve incompetence was detected in a significantly higher percentage of TGA patients (72.9%) compared to TIA patients (35.7%) and controls (39.5%) (p < 0.01).

Conclusions:

  • Transient global amnesia (TGA) patients present with fewer vascular risk factors than transient ischemic attack (TIA) patients.
  • The study did not confirm paradoxical embolism through patent foramen ovale (PFO) as a cause of TGA.
  • Cerebral venous hypertension, potentially resulting from internal jugular valve incompetence, may be implicated in the development of TGA.