Microvascular decompression for hemifacial spasm involving the vertebral artery

Area of Science:

• Neurosurgery
• Vascular Surgery
• Neurology

Background:

• Hemifacial spasm (HFS) involving the vertebral artery (VA) is a condition treated with microvascular decompression (MVD).
• Preoperative assessment of VA anatomy is crucial for surgical planning.

Purpose of the Study:

• To evaluate clinical and surgical outcomes of HFS patients undergoing MVD for VA involvement.
• To compare outcomes between movable and unmovable VA anatomies.
• To investigate complications and transposition procedures for VA variations.

Main Methods:

• Retrospective study of 109 HFS patients undergoing MVD for VA involvement.
• Patients categorized into Group A (movable VA) and Group B (unmovable VA).
• Outcomes and complications assessed post-surgery and during a mean 21-month follow-up.

Main Results:

• Long-term cure rates were higher in Group A (movable VA) than Group B (unmovable VA) (93.1% vs. 75.7%).
• Group B had significantly higher surgical complication rates (45.9% vs. 15.3%) and bilateral VA compression (27% vs. 8.3%).
• No significant difference in long-term cranial nerve complications between groups.

Conclusions:

• Microvascular decompression is effective for VA-involved HFS, with preoperative VA assessment guiding strategy.
• Movable VA anatomy is associated with better long-term efficacy and fewer complications.
• Teflon bridge placement aids decompression in challenging VA anatomies.