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From the Department of Neurology. Institute of Brain Research, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
Systolic blood pressure. mean R-R interval, and R-R interval variance were studied in patients with Parkinson's disease, spinocerebellar degeneration, and Shy-Drager syndrome. Postural hypotension correlated with anhidrosis (p < 0.05), indicating sympathetic vasomotor dysfunction. Reduction of R-R interval variance while resting supine correlated with bladder-bowel dysfunction (p < 0.05), indicating parasympathetic impairment. Reduction of R-R interval variance after postural changes correlated with constipation (p < 0.005), postural hypotension (p < 0.05), and anhidrosis (p < 0.05), indicating both parasympathetic and sympathetic involvement. Dynamic study of the R-R interval provides objective information about autonomic function in neurologic disease.
Address correspondence and reprint requests to Dr. Kuroiwa, Department of Neurology, Iwate University School of Medicine, 19-1, Uchimaru. Morioka, 020, Japan.
Accepted for publication July 26, 1982.
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