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Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
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Microvascular Decompression for Hemifacial Spasm Associated with Bilateral Vertebral Artery Compression
Hiroshi Shimano1, Akinori Kondo1, Soichiro Yasuda1
1Department of Neurosurgery, Brain and Spine Surgery Center, Shiroyama Hospital, Osaka, Japan.
World Neurosurgery
|June 24, 2015
Summary
Bilateral vertebral artery compression causing hemifacial spasm is rare and challenging to treat. Special surgical techniques are required for safe and effective microvascular decompression, achieving good outcomes.
Area of Science:
- Neurosurgery
- Vascular Neurology
Background:
- Microvascular decompression (MVD) is effective for hemifacial spasm (HFS).
- Bilateral vertebral artery (VA) compression causing HFS is rare and technically demanding.
- Specialized techniques are needed for VA decompression at the root exit zone (REZ).
Purpose of the Study:
- Investigate characteristics of bilateral VA compression in HFS.
- Determine safe and effective decompression methods for these rare cases.
Main Methods:
- Retrospective analysis of 131 MVD surgeries for HFS.
- Identified 4 cases (3.1%) with bilateral VA compression.
- Employed transposition and fixation of dolichoectatic VAs to dura mater.
Main Results:
- Bilateral VAs were the primary cause in 4 patients, often associated with other arteries.
- Contralateral VAs were typically more ectatic and tougher, posing surgical challenges.
- Transposition achieved complete HFS resolution in 3 patients; one had minimal residual spasm.
- Complications included transient facial palsy and moderate hearing loss in one case each.
Conclusions:
- HFS due to bilateral VA compression is uncommon and difficult to manage.
- Dolichoectatic and tough VAs necessitate advanced surgical techniques for REZ decompression.
- Successful outcomes are achievable with specialized MVD approaches.
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