The purpose of this study was to quantitatively assess cardiovagal, adrenergic and postganglionic sudomotor functions in a patient with chorea-acanthocytosis. We describe a 25-year-old woman with acanthocytosis, lip and tongue biting, chorea like movements and increased levels of serum creatine phosphokinase. The patient presented with orthostatic hypotension. The heart period response to deep breathing was moderately decreased and the quantitative sudomotor axon reflex test (QSART) was mildly abnormal in the lower extremities. The composite autonomic score (CASS) for this patient was 6 points which indicates moderate autonomic failure. Although a few previous reports have described autonomic dysfunction associated with chorea-acanthocytosis and have indicated that impairment is primarily sympathetic, our case study suggests that there is also parasympathetic dysfunction. We conclude that there is widespread autonomic involvement in chorea-acanthocytosis and that autonomic studies are useful in monitoring their course.
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Accepted: May 11, 2001
Received in revised form: May 11, 2001
Received: February 26, 2001
© 2002 Elsevier Science B.V. Published by Elsevier Inc. All rights reserved.