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Periodic paralyses.

L Gutmann1

  • 1Department of Neurology, West Virginia University School of Medicine, Morgantown, WV 26506, USA.

Neurologic Clinics
|February 5, 2000
PubMed
Summary
This summary is machine-generated.

Periodic paralyses are muscle channelopathies causing episodic weakness. This review covers hypokalemic periodic paralysis, potassium-sensitive periodic paralysis, and paramyotonia congenita, detailing their clinical features, pathophysiology, diagnosis, and treatments.

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Area of Science:

  • Neurology
  • Muscle Physiology
  • Channelopathies

Background:

  • Periodic paralyses are a group of inherited muscle disorders characterized by episodic muscle weakness or paralysis.
  • These conditions stem from genetic defects in ion channels crucial for muscle membrane excitability.
  • Key examples include hypokalemic periodic paralysis, potassium-sensitive periodic paralysis, and paramyotonia congenita.

Purpose of the Study:

  • To provide a comprehensive review of periodic paralyses.
  • To elucidate the clinical presentations, underlying pathophysiological mechanisms, diagnostic approaches, and therapeutic strategies for these channelopathies.

Main Methods:

  • Literature review of periodic paralyses, focusing on hypokalemic periodic paralysis, potassium-sensitive periodic paralysis, and paramyotonia congenita.

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  • Synthesis of information regarding clinical manifestations, genetic basis, electrophysiological findings, and treatment outcomes.

    • Main Results:

    • Periodic paralyses manifest as attacks of muscle weakness or paralysis, often triggered by specific factors like exercise, cold, or diet.
    • Pathophysiological abnormalities involve ion channel dysfunction, leading to altered muscle membrane potential and impaired muscle contraction.
    • Diagnostic evaluation includes clinical history, physical examination, serum potassium levels, and sometimes genetic testing or electromyography.

    Conclusions:

    • Understanding the specific channel defects is crucial for accurate diagnosis and targeted treatment of periodic paralyses.
    • Management strategies aim to prevent attacks, manage acute episodes, and address long-term muscle function.
    • Further research into novel therapeutic targets for these rare muscle channelopathies is warranted.