Evidence map›Paper›PMID 32305605›Full record

SynthesisWorld neurosurgery2020

Spasm Freedom Following Microvascular Decompression for Hemifacial Spasm: Systematic Review and Meta-Analysis.

Katherine Holste, Ronald Sahyouni, Zoe Teton, Alvin Y Chan, Dario J Englot, John D Rolston

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in World neurosurgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Katherine HolsteDepartment of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA. Electronic address: holsteka@med.umich.edu.
Ronald SahyouniDepartment of Neurological Surgery, University of California, Irvine, California, USA.
Zoe TetonDepartment of Neurosurgery, Oregon Health & Science University, Portland, Oregon, USA.
Alvin Y ChanDepartment of Neurological Surgery, University of California, Irvine, California, USA.
Dario J EnglotDepartment of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
John D RolstonDepartment of Neurosurgery, University of Utah, Salt Lake City, Utah, USA.

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM008620 · NIGMS · UNIVERSITY OF CALIFORNIA-IRVINE · PI GOLDIN, ALAN L · 1999 to 2023
$8.1M
Relating Vigilance to Connectivity and Neurocognition in Temporal Lobe EpilepsyR01NS112252 · NINDS · VANDERBILT UNIVERSITY MEDICAL CENTER · PI ENGLOT, DARIO J · 2019 to 2023
$3.0M
Patient-Specific Modeling and Network Perturbation to Enhance the Predictability of Direct Cortical Stimulation for EpilepsyK23NS114178 · NINDS · UNIVERSITY OF UTAH · PI ROLSTON, JOHN D · 2019 to 2023
$961k
MULTIMODAL MAPPING OF SUBCORTICAL AND CORTICAL FUNCTIONAL NETWORK DISTURBANCES IN FOCAL EPILEPSYR00NS097618 · NINDS · VANDERBILT UNIVERSITY MEDICAL CENTER · PI ENGLOT, DARIO J · 2017 to 2019
$743k
Propagation patterns of microelectrode-recorded human interictal dischargesR21NS113031 · NINDS · UNIVERSITY OF UTAH · PI ROLSTON, JOHN D · 2019 to 2019
$427k
NIGMS NIH HHS T32 GM008620NINDS NIH HHS K23 NS114178NINDS NIH HHS R00 NS097618NINDS NIH HHS R01 NS112252NINDS NIH HHS R21 NS113031
6 · The paper itself

Abstract

backgroundHemifacial spasm (HFS) is a debilitating disorder characterized by intermittent involuntary movement of muscles innervated by the facial nerve. HFS is caused by neurovascular compression along the facial nerve root exit zone and can be treated by microvascular decompression (MVD). The goal was to determine rates and predictors of spasm freedom after MVD for HFS.

methodsA literature search using the key terms "microvascular decompression" and "hemifacial spasm" was performed. The primary outcome variable was spasm freedom at last follow-up. Analysis was completed to evaluate for variables associated with spasm-free outcome.

resultsA total of 39 studies including 6249 patients were analyzed. Overall spasm freedom rate was 90.5% (5652/6249) at a follow-up of 1.25 ± 0.04 years. There was no significant relationship between spasm freedom versus persistent spasm and age at surgery, timing of follow-up, gender, disease duration, side of disease, or vessel type. Spasm freedom was more likely after an initial surgery versus a redo MVD (odds ratio 4.16, 95% confidence interval 1.99-8.68; P < 0.01).

conclusionsMVD works well for HFS with cure rates >90% at 1-year follow-up in 6249 patients from 39 studies. A significant predictor of long-term spasm freedom at 1 year was an initial MVD as compared to repeat MVD. The majority of published manuscripts on MVD for HFS are heterogeneous single-institutional retrospective studies. As such, a large-scale meta-analysis reporting outcome rates and evaluating significant predictors of spasm freedom provides utility in the absence of randomized controlled studies.

Indexed as

Hemifacial SpasmHumansMicrovascular Decompression SurgerySpasmTreatment OutcomeClinical predictorsHemifacial spasmMeta-analysisMicrovascular decompression

Identifiers

PMID32305605
PMCPMC7899163

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.