title: [Levels of biologically active substances in the blood of patients resistant and nonresistant to antihypertensive therapy].
abstract: OBJECTIVE
  To clarify the role of differences in the levels of some biologically active substances (BAS) in plasma of patients with resistance to therapy or without it measured before treatment, during treatment and application of plasmapheresis.
  
  
  METHODS
  Resistance to therapy was assessed clinically and according to 24-h monitoring in 35 patients aged 35-56 years with essential hypertension (n = 19), related to chronic pyelonephritis (n = 13) and glomerulonephritis (n = 3). Plasma BAS were studied by radio- and enzyme immunoassays.
  
  
  RESULTS
  Blood pressure monitoring provided more precise determination of the treatment responders than clinical tests. Initially, responders to therapy had higher level of endothelin-1 and low of hydrocortisone.
  
  
  CONCLUSIONS
  Responders to antihypertensive therapy were distinguished by a significant decrease of plasma aldosterone within a year vs aldosterone levels before the treatment. Nonresponders had no significant decrease of plasma aldosterone. No other marked differences in plasma BAS between the responders and nonresponders to antihypertensive treatment were found.
authors.forename: E A
authors.initials: EA
authors.lastname: Tabak'ian
authors.forename: V V
authors.initials: VV
authors.lastname: Dmitriev
authors.forename: V P
authors.initials: VP
authors.lastname: Masenko
authors.forename: V V
authors.initials: VV
authors.lastname: Kukharchuk
mesh_terms: D000328:Adult; D000450:Aldosterone / Q000097:blood*; D000959:Antihypertensive Agents / Q000627:therapeutic use*; D018660:Blood Pressure Monitoring, Ambulatory; D004351:Drug Resistance; D019332:Endothelin-1 / Q000097:blood*; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D006973:Hypertension / Q000097:blood* / Q000175:diagnosis / Q000188:drug therapy; D008297:Male; D008875:Middle Aged; D013997:Time Factors
chemical_list: D000959:Antihypertensive Agents; D019332:Endothelin-1; D000450:Aldosterone; D006854:Hydrocortisone