title: [The success of heart rate variability biofeedback parameters in persons with different levels of blood pressure].
abstract: OBJECTIVE
  The aim was to determine the nature of cardiovascular reactions during a single session of heart rate variability (HRV) biofeedback in order to increase vagal effects on heart rhythm in patients with different initial levels of blood pressure (BP).
  
  
  METHODS
  33 people with normal blood pressure (group I), 20 people with uncorrected arterial hypertension (AH) grade 1-2 (group II) and 22 people with AH grade 1-2 taking antihypertensive drugs (group III) were observed. The parameters of heart rate variability (HRV), BP and pulse aximetry in the initial stage, during a single HRV biofeedback session and after this session in order to increase the total power of the HRV spectrum (each stage 5 min).
  
  
  RESULTS
  In patients of group II low success of HRV biofeedback session, a high sympathetic reactivity and reduced oxygen blood saturation were determined. A reactivity of vagal mechanism is more pronounced in persons of group III than in those of group II. It is reflected in a significant increase in their total power of the HRV spectrum compared to the initial values and in uptrend saturation levels during the biofeedback session.
  
  
  CONCLUSIONS
  The ability to HRV biofeedback in order to increase the total power of the HRV spectrum for standard short recording (5 min) can be seen as a test to determine the safety reserves of vagal autonomic cardiovascular regulation in persons with increased blood pressure.
authors: L V
authors: LV
authors: Poskotinova
authors: D B
authors: DB
authors: Demin
authors: E V
authors: EV
authors: Krivonogova
authors: M N
authors: MN
authors: Dieva
authors: N M
authors: NM
authors: Khasnova
mesh_terms: D000328:Adult; D000959:Antihypertensive Agents / Q000627:therapeutic use; D001341:Autonomic Nervous System / Q000503:physiopathology*; D001676:Biofeedback, Psychology; D001794:Blood Pressure / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000188:drug therapy / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged
chemical_list: D000959:Antihypertensive Agents