title: [Features of daily rhythm of arterial pressure in patients with primary arterial hypertension and neurogenic syncope conditions].
abstract: OBJECTIVE
  A comparative analysis of parameters of systemic BP in patients with primary arterial hypotension (PAH) and in patients with neurogenic syncopes (NS) in the cycle sleep-awake.
  
  
  METHODS
  Blood pressure was investigated in 20 patients with PAH aged 16-44 years and 18 patients with NS aged 16-49 years. 24-h ambulatory monitoring of BP was made on the monitor ABPM-02/M (Meditech, Hungary).
  
  
  RESULTS
  Rhythm indices of BP in NS patients corresponded to age normal criteria. 24-h arrhythmia of BP in PAH patients manifests with excessive drop of diastolic BP in sleep (55% patients were overdippers). PAH and NS patients differ maximally by hypotonic load in sleep: 1.0 +/- 0.7% in NS vs 15.4 +/- 3.2% in PAH. Hypotonia episodes in awake PAH patients were registered at each 4th-5th measurement of BP, in NS patients--at each 11th-13th. Heart rate in awake PAH patients is higher than in healthy subjects.
  
  
  CONCLUSIONS
  Hypotonic load in sleep carries the highest differentially-diagnostic importance. This makes more perspective examinations of such patients in the cycle sleep-awake. The changes observed in PAH patients evidence for activation of cerebral sympathico-adrenal systems participating in baroreflex regulation.
authors.forename: Z A
authors.initials: ZA
authors.lastname: Musaeva
authors.forename: V Iu
authors.initials: VIu
authors.lastname: Oknin
authors.forename: B A
authors.initials: BA
authors.lastname: Khapaev
authors.forename: A V
authors.initials: AV
authors.lastname: Fedotova
authors.forename: A M
authors.initials: AM
authors.lastname: Veĭn
mesh_terms: D000293:Adolescent; D000328:Adult; D002940:Circadian Rhythm; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000503:physiopathology*; D008875:Middle Aged; D012890:Sleep; D019462:Syncope, Vasovagal / Q000150:complications / Q000503:physiopathology*; D014851:Wakefulness