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Prospective study of microvascular decompression in hemifacial spasm
1Department of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.
Neurosurgery
|April 1, 1997
Summary
Symptoms of hemifacial spasm (HFS) often resolve gradually after microvascular decompression (MVD). Delayed resolution is common and abnormal muscle response can predict outcomes in HFS patients undergoing MVD.
Area of Science:
- Neurosurgery
- Neurology
Background:
- Hemifacial spasm (HFS) symptoms typically resolve immediately after microvascular decompression (MVD).
- However, some patients experience a gradual resolution of HFS symptoms post-MVD.
Purpose of the Study:
- To investigate the time course and rate of delayed HFS resolution after MVD.
- To identify factors influencing delayed resolution through long-term follow-up.
Main Methods:
- A cohort of 261 patients with HFS undergoing MVD were clinically observed.
- Follow-up ranged from 6 months to 2 years for 226 patients (1985-1995).
Main Results:
- Excellent results were achieved in 61.1% after 1 week, improving to 82.7% after 6 months.
- Delayed resolution occurred in 37.4% of patients with complete resolution and significantly correlated with improved outcomes (P < 0.05).
- Abnormal muscle response post-MVD correlated positively with resolution (r=0.3099, P < 0.05).
Conclusions:
- Clinical outcomes for HFS following MVD show significant improvement over time.
- Abnormal muscle response immediately after MVD serves as a valuable prognostic indicator for HFS resolution.