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Related Experiment Videos

Changes in brain volume after EC-IC bypass surgery.

T Inoue1, J Jinnouchi

  • 1Department of Neurosurgery, Cerebrovascular Center and Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan. itkkr@qmed.hosp.go.jp

Acta Neurochirurgica. Supplement
|May 24, 2008
PubMed
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Extracranial-intracranial (EC-IC) bypass surgery may help preserve brain volume in patients with cerebral artery occlusive disease. Changes in acetazolamide reactivity could predict future brain atrophy, suggesting a potential biomarker for monitoring disease progression.

Area of Science:

  • Neurology
  • Neurosurgery
  • Radiology

Background:

  • Hemodynamic brain ischemia due to cerebral artery occlusive disease poses a risk for brain atrophy.
  • Extracranial-intracranial (EC-IC) bypass surgery is a treatment option for selected patients.
  • Assessing brain volume changes and cerebral hemodynamics is crucial for understanding disease progression and treatment efficacy.

Purpose of the Study:

  • To investigate changes in brain volume using magnetic resonance imaging (MRI) in patients with and without EC-IC bypass surgery.
  • To examine the association between cerebral hemodynamics, assessed by single photon emission computed tomography (SPECT), and brain volume changes.
  • To determine if acetazolamide reactivity can predict brain atrophy in patients with cerebral artery occlusive disease.

Main Methods:

Related Experiment Videos

  • Prospective, randomized, double-blind study involving 10 patients meeting Japanese EC-IC Bypass Trial criteria.
  • MRI was used to measure changes in brain volume.
  • SPECT was employed to assess cerebral blood flow (CBF) and acetazolamide reactivity.

Main Results:

  • Patients without EC-IC bypass surgery showed a decline in the affected/unaffected ratio of % brain volume (p < 0.02).
  • Patients with EC-IC bypass surgery exhibited an increase in the affected/unaffected % rCBF ratio (p < 0.03) and increased acetazolamide reactivity in the affected hemisphere (p < 0.01).
  • A significant positive correlation was found between the 2-year change in acetazolamide reactivity and the 2-year change in the affected/unaffected % brain volume ratio (R2 = 0.737, p = 0.0007).

Conclusions:

  • EC-IC bypass surgery may be associated with preserved brain volume in patients with hemodynamic brain ischemia.
  • Acetazolamide reactivity shows promise as a predictor of brain atrophy in cerebral artery occlusive disease.
  • Monitoring acetazolamide reactivity could aid in managing patients at risk of progressive brain volume loss.