Document Detail


Renin suppressibility and blood pressure response during acute sodium loading in patients with essential hypertension.
MedLine Citation:
PMID:  8104577     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Sequential changes in renin-aldosterone secretions and blood pressure (BP) response during acute sodium (Na) loading were studied in 50 patients with essential hypertension (EH) and nine normotensive volunteers. Following an infusion of 2 L of isotonic saline at a rate of 500 mL/h, plasma renin activity (PRA) and the plasma aldosterone concentration (PAC) were similarly suppressed, while sodium excretion appreciably increased in hypertensive as well as normotensive subjects. When patients were divided into two subgroups according to the extent of renin suppression, 26 were classified as adequate responders with the proportion of decrement of PRA at the end of the infusion exceeding 50% of the baseline values, while 24 were inadequate responders with a decrement of less than 50%. The extent of renin suppression was consistently greater in adequate responders than in inadequate responders throughout the course of infusion. Adequate responders also had a higher pre-saline PRA and attained a smaller post-saline natriuretic response than inadequate responders. Although the mean BP in both subgroups remained stable at all periods, inadequate responders had a minor but significantly higher percent of increment of MBP at the end of the infusion than adequate responders (3.6 +/- 2.0 vs -1.7 +/- 1.4%, p < 0.05). These results suggest that renin suppressibility during acute Na loading may be either linked with maintenance of BP homeostasis or may merely reflect the sodium-volume status of essential hypertension, with patients with greater suppression of renin being more Na-volume resistant than those with less inhibition.
Authors:
Y M Chen; K D Wu; C C Yang; B S Hsieh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Formosan Medical Association = Taiwan yi zhi     Volume:  92     ISSN:  0929-6646     ISO Abbreviation:  J. Formos. Med. Assoc.     Publication Date:  1993 Apr 
Date Detail:
Created Date:  1993-11-04     Completed Date:  1993-11-04     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9214933     Medline TA:  J Formos Med Assoc     Country:  HONG KONG    
Other Details:
Languages:  eng     Pagination:  307-11     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, National Taiwan University Hospital, Taipei, R.O.C.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Pressure / drug effects*
Female
Homeostasis
Humans
Hypertension / physiopathology*
Infusions, Intravenous
Male
Middle Aged
Renin / blood
Renin-Angiotensin System / drug effects*
Sodium / administration & dosage*,  diagnostic use
Chemical
Reg. No./Substance:
7440-23-5/Sodium; EC 3.4.23.15/Renin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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