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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 the vertebral artery
1Department of Neurosurgery, Suzhou Kowloon Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Suzhou, 215021, China.
Acta Neurologica Belgica
|March 24, 2017
Summary
Vertebral artery (VA) compression is a common cause of hemifacial spasm (HFS). Microvascular decompression (MVD) surgery effectively treats VA-associated HFS, with high symptom relief rates comparable to non-VA cases.
Area of Science:
- Neurosurgery
- Vascular Neurology
Background:
- Hemifacial spasm (HFS) is a neurological disorder characterized by involuntary contractions of facial muscles.
- Vertebral artery (VA) involvement is an underrecognized cause of HFS.
- Microvascular decompression (MVD) is a surgical option for medically refractory HFS.
Purpose of the Study:
- To characterize baseline features of hemifacial spasm associated with vertebral artery compression.
- To evaluate the efficacy of microvascular decompression in treating vertebral artery-associated hemifacial spasm.
- To compare surgical outcomes between VA-associated and non-VA-associated HFS.
Main Methods:
- Retrospective analysis of 118 consecutive HFS patients undergoing MVD from February 2010 to February 2015.
- Comparison of 29 VA-associated HFS cases with non-VA-associated HFS cases.
- Detailed assessment of VA compression patterns (direct vs. indirect) at the root exit zone (REZ).
Main Results:
- Vertebral artery compression was identified in 29 of 118 HFS patients (24.6%).
- Indirect VA compression via branches was more common (21/29 cases) than direct compression (8/29 cases).
- Symptomatic relief was achieved in 96.6% of VA-associated HFS cases (26 complete, 2 partial), with no significant difference compared to non-VA cases.
Conclusions:
- Vertebral artery-associated hemifacial spasm is not rare and often involves indirect compression.
- Microvascular decompression is a safe and effective treatment for VA-associated HFS.
- Surgical outcomes for VA-associated HFS are comparable to those for non-VA-associated HFS.
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