Role of Reactive Hyperreninemia in Blood Pressure changes induced by Sodium Depletion in Patients with Refractory Hypertension

Haralambos Gavras, Bernard Waeber, Glenn R. Kershaw, Chang Seng Liang, Stephen C. Textor, Hans R. Brunner, Charles P. Tifft, Irene Gavras

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Sixteen patients with refractory hypertension were submitted to rigorous sodium depletion while cardiovascular bomeostasis was monitored with measurements of hormonal and hemodynamlc parameters and repeat saralasis tests. This regimen resulted in a negative sodium balance by an average of 300 mEq. The loss of sodium closely correlated to the decrease of body weight (r « 0.70, p < 0.005). Blood pressure (BP) decreased from 176/116 ± 8/3 to 155/109 ± 6/3 mm Hg. There was a significant correlation between percent increments in plasma renin activity (PRA) and the rise in plasma norepinephrine (r = 0.68, p < 0.05) and a dose negative correlation between percent increase in PRA and the ratio of fall in mean Mood pressure (MAP), per unit of weight loss (r = -0.73, p < 0.005). Thus, patients with the least percent increase In PRA demonstrated the greatest fall in BP per unit of weight loss, indicating that relative rather than absolute elevation of renin may be tne factor limiting antihypertenslve efficacy of sodium depletion. Sodium depletion induced increase in peripheral resistance and decrease in cardiac output, both mostly attributable to relative hyperreninemia. Indeed, the adverse hemodynamic changes were reversed by angiotensin inhibition, during which BP normalized. It is concluded that vigorous sodium depletion complemented by angiotensin blockade or suppression with sympatholytic agents improves management of otherwise refractory hypertension.

Original languageEnglish (US)
Pages (from-to)441-447
Number of pages7
JournalHypertension
Volume3
Issue number4
DOIs
StatePublished - 1981

Keywords

  • Angiotensin blockade
  • Cardiac index
  • Hyperreninemla
  • Nemodynamks
  • Norepinephrine
  • Plasma renin activity
  • Refractory hypertension
  • Saralasin
  • Sodium depletion
  • Sympatbolytic agents

ASJC Scopus subject areas

  • Internal Medicine

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