| Vascular hypertrophy and remodeling in secondary hypertension. | |
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MedLine Citation:
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PMID: 8901824 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It has been proposed that several neurohumoral factors may be involved in the genesis of vascular structural changes (remodeling or hypertrophy) frequently observed in essential hypertension. Therefore, in this study we investigated vascular structural alterations of subcutaneous small resistance arteries in patients with secondary forms of hypertension. The study included 70 participants: 11 with pheochromocytoma, 13 with primary aldosteronism, and 17 with renovascular hypertension; 13 normotensive subjects and 16 patients with essential hypertension served as controls. All subjects were submitted to a biopsy of subcutaneous fat. Small resistance arteries were dissected and mounted on a micromyograph, and media-lumen ratio, media thickness, remodeling index, and growth index were evaluated. Endothelial function was evaluated according to the dose-response curve to acetylcholine. In patients with either primary aldosteronism or renovascular hypertension, a marked increase in media-lumen ratio was observed, whereas in patients with pheochromocytoma, the extent of vascular structural alterations was similar to that observed in patients with essential hypertension. The increase in media-lumen ratio in patients with essential hypertension and with pheochromocytoma was mainly due to vascular remodeling (remodeling index, 93% to 94%), whereas in patients with renovascular hypertension, there was vascular growth (remodeling index, 70%; growth index, 53%). Patients with primary aldosteronism had an intermediate pattern compared with the other two forms of secondary hypertension. An evident impairment of endothelial function was observed in all four hypertensive groups. In conclusion, the renin-angiotensin-aldosterone system seems to be more powerful than the adrenergic system in inducing vascular growth. |
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Authors:
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D Rizzoni; E Porteri; M Castellano; G Bettoni; M L Muiesan; P Muiesan; S M Giulini; E Agabiti-Rosei |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Hypertension Volume: 28 ISSN: 0194-911X ISO Abbreviation: Hypertension Publication Date: 1996 Nov |
Date Detail:
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Created Date: 1996-12-06 Completed Date: 1996-12-06 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7906255 Medline TA: Hypertension Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 785-90 Citation Subset: IM |
Affiliation:
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Department of Medical Sciences, University of Brescia, Italy. damiano.rizzoni@schering-pl.it |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetylcholine
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pharmacology Adult Arteries / drug effects, pathology* Catecholamines / blood Female Humans Hyperaldosteronism / complications* Hypertension / etiology*, metabolism Hypertrophy Male Middle Aged Nitric Oxide / physiology Pheochromocytoma / complications* Vascular Diseases / etiology*, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Catecholamines; 10102-43-9/Nitric Oxide; 51-84-3/Acetylcholine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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