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Related Experiment Video

Updated: May 18, 2026

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Published on: July 5, 2011

Microvascular decompression for hemifacial spasm.

Jin Zhu¹, Shi-Ting Li, Jun Zhong

¹Department of Neurosurgery, XinHua Hospital, Shanghai JiaoTong University School of Medicine, The Cranial Nerve Disease Center of Shanghai, Shanghai, China.

The Journal of Craniofacial Surgery

|September 6, 2012

Summary

Microvascular decompression (MVD) for hemifacial spasm can succeed even when the conflict site is unapproachable. Real-time electromyography guides relocation of the offending artery, ensuring spasm-free outcomes.

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Minimally Invasive Surgical Decompression of Occipital Nerves

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Last Updated: May 18, 2026

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Published on: July 5, 2011

Minimally Invasive Surgical Decompression of Occipital Nerves

Minimally Invasive Surgical Decompression of Occipital Nerves

Published on: September 13, 2024

Area of Science:

Neurosurgery
Neurology

Background:

Microvascular decompression (MVD) is a primary treatment for hemifacial spasm.
Surgical failures occur, sometimes due to difficulties in approaching the neurovascular conflict site.

Purpose of the Study:

To evaluate the efficacy of MVD in challenging cases where the neurovascular conflict site is not visualized.
To explore the role of real-time electromyography in guiding surgical intervention.

Main Methods:

Retrospective analysis of 211 MVD procedures performed in 2010.
Recording of intraoperative abnormal muscle responses.
Focus on 3 cases with unapproachable neurovascular conflict sites.

Main Results:

In 3 cases, the neurovascular conflict site was obscured by anatomical challenges (arterial branch embedded in petrous bone).
Real-time abnormal muscle response monitoring enabled successful relocation of the offending artery.
All patients achieved immediate and complete spasm relief with no recurrence at follow-up.

Conclusions:

Successful MVD is achievable even when the conflict site cannot be visualized.
Real-time electromyography is a valuable tool for guiding MVD when direct visualization is not possible.
Relocating the offending artery, guided by EMG, can lead to successful outcomes in challenging hemifacial spasm cases.