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Microvascular compression: an alternative view and hypothesis.

C B Adams1

  • 1Department of Neurological Surgery, Radcliffe Infirmary, Oxford, England.

Journal of Neurosurgery
|January 1, 1989
PubMed
Summary
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Microvascular compression (MVC) is critically examined. Evidence supporting MVC for neurological conditions like trigeminal neuralgia is deemed insufficient, questioning its efficacy.

Area of Science:

  • Neurology
  • Neurosurgery

Background:

  • Microvascular compression (MVC) is a proposed cause for several cranial nerve disorders.
  • Conditions like trigeminal neuralgia, hemifacial spasm, and glossopharyngeal neuralgia are often attributed to MVC.
  • Microvascular decompression (MVD) is a surgical intervention aimed at alleviating these symptoms by separating offending vessels from cranial nerves.

Purpose of the Study:

  • To critically evaluate the concept and supporting evidence of microvascular compression (MVC).
  • To analyze the effectiveness and underlying rationale of microvascular decompression (MVD) procedures.

Main Methods:

  • Critical review of existing literature on microvascular compression and its related neurological conditions.
  • Analysis of neurophysiological data and surgical outcomes of microvascular decompression.

Related Experiment Videos

  • Anatomical consideration of intracranial vessels and nerve root entry/exit zones.

    • Main Results:

    • The defined root entry or exit zone in MVC is shorter than commonly accepted.
    • One-third of patients undergoing microvascular decompression (MVD) do not achieve optimal results.
    • The evidence supporting the MVC hypothesis, including neurophysiological data, is considered insufficient and unconvincing.

    Conclusions:

    • The hypothesis of microvascular compression (MVC) as the primary cause of specific cranial nerve disorders lacks robust evidence.
    • The effectiveness of microvascular decompression (MVD) is questionable, with a significant portion of patients experiencing suboptimal outcomes.
    • Alternative explanations for symptom relief after MVD, such as nerve trauma during surgery, are suggested. The concept would be stronger if MVD could treat conditions not directly related to the implicated cranial nerves, like spasmodic torticollis.