title: Changing cerebral blood flow velocity detected by transcranial Doppler ultrasound during head up tilt in patients with multiple sclerosis.
abstract: OBJECTIVE
  Multiple sclerosis (MS) is a chronic inflammatory disease of central nervous system. We aimed to investigate the cerebral blood flow velocity (CBFV) changes in MS by transcranial Doppler.
  
  
  METHODS
  Twenty patients with MS, 20 age-matched healthy controls were included in the study. In both groups, blood flow velocities (BFVs) of middle cerebral arteries (MCAs) were evaluated. The changes of blood pressure, heart rate along with the changes in BFV of MCA were recorded after the patients were raised to upright position.
  
  
  RESULTS
  In both groups, upon raising the tilt table to the upright position, the mean CBFV values were found to be lower in comparison with the recorded baseline values (P values <0.05). The decline in the mean CBFV values was more significant in patients with MS (P = 0.01).
  
  
  CONCLUSIONS
  Our study showed upon raise of the tilt table, the mean BFVs decreased more in MS patients than control group with a more prominent change in the subgroup of MS patients with expanded disability scale scores > or =2. By use of transcranial Doppler ultrasound, it may be possible to evaluate BFV changes in patients with MS.
authors.affiliation: Erzurum Numune Hospital, Clinics of Neurology, Erzurum, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Gonul
authors.forename: T
authors.initials: T
authors.lastname: Asil
authors.forename: K
authors.initials: K
authors.lastname: Balci
authors.forename: Y
authors.initials: Y
authors.lastname: Celik
authors.forename: N
authors.initials: N
authors.lastname: Turgut
authors.forename: I
authors.initials: I
authors.lastname: Uzunca
mesh_terms: D000293:Adolescent; D000328:Adult; D001783:Blood Flow Velocity / Q000502:physiology; D001921:Brain / Q000098:blood supply* / Q000503:physiopathology*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000503:physiopathology*; D018667:Tilt-Table Test; D017585:Ultrasonography, Doppler, Transcranial