title: Autonomic dysfunction in Parkinson's disease and vascular parkinsonism.
abstract: OBJECTIVE
  To clarify the autonomic dysfunction in idiopathic Parkinson's disease (PD) and vascular parkinsonism (VP), we investigated the relationship between blood pressure (BP) and pulse rate (PR), the standing test, and the coefficient of variation in the R-R interval (CV[R-R]).
  
  
  METHODS
  BP and PR were determined automatically every 30 min for 24 h in 15 PD patients, 15 VP patients and 15 healthy volunteers. The CV(R-R) values evaluated by an electrocardiogram and the standing test were also performed.
  
  
  RESULTS
  The BP-PR relationship was lost in the patient groups. There was no significant difference in the standing test between the control and patient groups. A significantly decreased CV(R-R) was observed in the VP group.
  
  
  CONCLUSIONS
  We speculate that our results may reflect an imbalance between the sympathetic and parasympathetic nervous systems in PD and VP.
authors.affiliation: Third Department of Internal Medicine, Hiroshima University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Murata
authors.forename: T
authors.initials: T
authors.lastname: Harada
authors.forename: F
authors.initials: F
authors.lastname: Ishizaki
authors.forename: Y
authors.initials: Y
authors.lastname: Izumi
authors.forename: S
authors.initials: S
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D001341:Autonomic Nervous System / Q000503:physiopathology*; D001342:Autonomic Nervous System Diseases / Q000150:complications*; D001794:Blood Pressure / Q000502:physiology*; D016022:Case-Control Studies; D002561:Cerebrovascular Disorders / Q000150:complications*; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000209:etiology / Q000503:physiopathology*; D011674:Pulse