Document Detail


Endothelium-dependent forearm vasodilation is reduced in normotensive subjects with familial history of hypertension.
MedLine Citation:
PMID:  1282967     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Endothelium-dependent vasodilation is reduced in essential hypertensive subjects. To evaluate whether this abnormality is a primary defect or is a consequence of blood pressure increment, in offspring of essential hypertensive and normotensive subjects (n = 13 subjects for each group) matched for age, sex, body weight, and blood pressure, we studied the response of forearm vasculature to acetylcholine (ACh) (an endothelium-dependent vasodilator), sodium nitroprusside (a direct vasodilator of vascular smooth muscle), and forearm ischemia (13 min plus 1 min of exercise) to induce maximal vasodilation. Drugs were infused into the brachial artery at cumulative doses (ACh: 0.15, 0.45, 1.5, 4.5, and 15 micrograms/100 ml of forearm tissue/min; sodium nitroprusside: 1, 3, and 10 micrograms/100 ml of forearm tissue/min) while forearm blood flow was measured by strain-gauge venous plethysmography. The intra-arterial blood pressure and heart rate were continuously monitored. Despite a comparable forearm vascular response to sodium nitroprusside and to forearm ischemia, the effect of ACh was significantly (p < 0.001) reduced in offspring of hypertensive subjects compared to the offspring of normotensive subjects. These data indicate that ACh-mediated forearm vasodilation is reduced in normotensive subjects with a familial history of essential hypertension, a finding that suggests that endothelium dysfunction can precede the appearance of hypertension and that this abnormality might play a role in the pathogenesis of essential hypertension.
Authors:
S Taddei; A Virdis; P Mattei; F Arzilli; A Salvetti
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of cardiovascular pharmacology     Volume:  20 Suppl 12     ISSN:  0160-2446     ISO Abbreviation:  J. Cardiovasc. Pharmacol.     Publication Date:  1992  
Date Detail:
Created Date:  1993-02-12     Completed Date:  1993-02-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7902492     Medline TA:  J Cardiovasc Pharmacol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  S193-5     Citation Subset:  IM    
Affiliation:
I Clinica Medica, University of Pisa, Italy.
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MeSH Terms
Descriptor/Qualifier:
Acetylcholine / pharmacology
Adult
Blood Pressure / drug effects
Endothelium, Vascular / drug effects,  physiology*
Female
Forearm / blood supply*
Humans
Hypertension / physiopathology*
Male
Nitroprusside / pharmacology
Regional Blood Flow / drug effects
Vasodilation* / drug effects
Chemical
Reg. No./Substance:
15078-28-1/Nitroprusside; 51-84-3/Acetylcholine

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


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