Document Detail


A comparison of angiotensin-converting enzyme inhibitors, calcium antagonists, beta-blockers and diuretic agents on reactive hyperemia in patients with essential hypertension: a multicenter study.
MedLine Citation:
PMID:  10676671     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The purpose of this study was to compare the effect of different antihypertensive agents, calcium antagonists, angiotensin-converting enzyme (ACE) inhibitors, beta-blockers and diuretic agents on endothelial function. BACKGROUND: Endothelial dysfunction is a component of essential hypertension, and various antihypertensive drugs may be able to restore normal function. METHODS: Forearm blood flow (FBF) was measured in 296 patients with essential hypertension, including 46 untreated subjects using strain-gauge plethysmography during reactive hyperemia and after sublingual administration of nitroglycerin (NTG). Forty-seven normotensive subjects were similarly evaluated as control subjects. RESULTS: The FBF during reactive hyperemia in the 296 hypertensive patients was significantly less than that in age-matched normotensive subjects. The increase in FBF after administration of sublingual NTG was similar in both groups. Systolic and diastolic blood pressures and forearm vascular resistance were greater in the untreated group than in the four treated groups and did not differ with respect to the antihypertensive agent used. The maximal FBF response from reactive hyperemia was significantly greater in the ACE inhibitor-treated group than in the group treated with calcium antagonists, beta-blockers, diuretic agents, or nothing (40.5 +/- 5.2 vs. 32.9 +/- 5.8, 34.0 +/- 5.6, 32.1 +/- 5.9, and 31.9 +/- 5.8 ml/min per 100 ml tissue, p < 0.05, respectively). Reactive hyperemia was similar in the calcium antagonist, beta-blocker, diuretic and untreated groups, and changes in FBF after sublingual NTG administration were similar in all groups. The infusion of NG-monomethyl-L-arginine, a nitric oxide (NO) synthase inhibitor, abolished the enhancement of reactive hyperemia in hypertensive patients treated with ACE inhibitors. CONCLUSIONS: These findings suggest that ACE inhibitors augment reactive hyperemia, an index of endothelium-dependent vasorelaxation, in patients with essential hypertension. This augmentation may be due to increases in NO.
Authors:
Y Higashi; S Sasaki; K Nakagawa; T Ueda; A Yoshimizu; S Kurisu; H Matsuura; G Kajiyama; T Oshima
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  35     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-02-29     Completed Date:  2000-02-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  284-91     Citation Subset:  AIM; IM    
Affiliation:
First Department of Internal Medicine, Hiroshima University School of Medicine, Japan. yhigashi@mcai.med.hiroshima-u.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adrenergic beta-Antagonists / therapeutic use*
Angiotensin-Converting Enzyme Inhibitors / therapeutic use*
Blood Flow Velocity
Blood Pressure / drug effects
Calcium Channel Blockers / therapeutic use*
Diuretics / therapeutic use*
Endothelium, Vascular / drug effects,  physiopathology
Female
Forearm / blood supply
Humans
Hyperemia / physiopathology*
Hypertension / drug therapy*,  physiopathology
Male
Middle Aged
Nitroglycerin / diagnostic use
Treatment Outcome
Vasodilation / drug effects*
Vasodilator Agents / diagnostic use
Chemical
Reg. No./Substance:
0/Adrenergic beta-Antagonists; 0/Angiotensin-Converting Enzyme Inhibitors; 0/Calcium Channel Blockers; 0/Diuretics; 0/Vasodilator Agents; 55-63-0/Nitroglycerin

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


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