Document Detail


Opposite effects of remodeling and hypertrophy on arterial compliance in hypertension.
MedLine Citation:
PMID:  9453357     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Sustained hypertension is associated with a reduction in large artery compliance. However, we previously showed that, at the site of the radial artery, a distal muscular artery, the compliance of hypertensive patients was not significantly different from those of normotensive controls when the two groups were studied at their respective mean arterial pressures, despite increased wall thickness in hypertensives. To determine whether this paradoxical finding could be related to a specific pattern of geometrical changes, we studied arterial compliance in never-treated hypertensive patients characterized either by radial artery hypertrophy or remodeling, and compared them to normotensive controls. By analogy with Devereux's classification for left ventricular hypertrophy, we defined remodeling as an increased thickness to radius ratio (h/r) and a normal vascular mass (VM), and arterial hypertrophy as an increased VM irrespective of the values of h/r. Internal diameter and wall thickness were measured at the site of the radial artery using a high resolution echo-tracking system. The lumen cross-section-pressure curve was determined from the two simultaneous and continuous recordings of arterial diameter and blood pressure. Then, the cross-sectional compliance (CC)-pressure curve was calculated. Isobaric compliance was calculated at 100 mm Hg. Thresholds for h/r and VM were determined according to gender as the 95th percentile of a group of 100 normotensive subjects. The group of hypertensive patients included 58 patients with hypertrophy (h/r: 0.25+/-0.04; VM: 31+/-6 mg/cm; mean+/-SD) and 25 patients with remodeling (h/r: 0.29+/-0.06; VM: 20+/-4 mg/cm) and was compared to a group of 50 age- and gender-matched normotensives (h/r: 0.16+/-0.02; VM: 17+/-4 mg/cm). Compared to normotensives, isobaric compliance of the radial artery was increased in hypertensive patients with hypertrophy (HH) whereas it was not different in hypertensive patients with remodeling (RH). These results indicate that compliance is dependent on hypertrophy or remodeling pattern and suggest that in the face of hypertension, only arterial hypertrophy is an adaptive process leading to normal operating compliance through an increased isobaric compliance.
Authors:
J J Mourad; X Girerd; P Boutouyrie; M Safar; S Laurent
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hypertension     Volume:  31     ISSN:  0194-911X     ISO Abbreviation:  Hypertension     Publication Date:  1998 Jan 
Date Detail:
Created Date:  1998-02-20     Completed Date:  1998-02-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7906255     Medline TA:  Hypertension     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  529-33     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, Broussais Hospital, Paris, France.
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MeSH Terms
Descriptor/Qualifier:
Blood Pressure
Female
Humans
Hypertension / pathology*,  physiopathology
Hypertrophy
Male
Middle Aged
Muscle, Smooth, Vascular / anatomy & histology,  pathology*,  physiopathology
Radial Artery / anatomy & histology,  pathology*,  physiopathology
Reference Values

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


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