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Orthostatic paroxysmal dystonia.

Kapil D Sethi1, Ki Hyeong Lee, Vasanti Deuskar

  • 1Department of Neurology, Medical College of Georgia, Augusta, Georgia 30912, USA. ksethi@neuro.mcg.edu

Movement Disorders : Official Journal of the Movement Disorder Society
|September 5, 2002
PubMed
Summary

A man experienced unexplained jerky movements when standing up, linked to severe carotid artery blockages. This new condition, orthostatic paroxysmal dystonia, may stem from reduced brain blood flow.

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Area of Science:

  • Neurology
  • Vascular Neurology
  • Movement Disorders

Background:

  • Cerebrovascular disease can manifest in various neurological symptoms.
  • Understanding the link between vascular issues and movement disorders is crucial for diagnosis.

Observation:

  • A 52-year-old male presented with a 3-year history of paroxysmal hemidystonia.
  • Symptoms were consistently triggered by assuming an upright posture after sitting or lying down.

Findings:

  • Magnetic Resonance Angiography revealed contralateral internal carotid artery occlusion and near-total ipsilateral internal carotid artery occlusion.
  • Subtraction single-proton emission computed tomography indicated reduced contralateral frontoparietal cortex perfusion during dystonic episodes.
  • The authors propose the term "orthostatic paroxysmal dystonia" for this clinical presentation.

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Implications:

  • This case highlights a potential new syndrome linking severe internal carotid artery disease to orthostatic-induced dystonia.
  • Further research is warranted to explore the pathophysiology and prevalence of orthostatic paroxysmal dystonia.
  • Recognition of this condition can aid in the diagnosis and management of patients with unexplained movement disorders and vascular risk factors.