Document Detail


Ambulatory arterial stiffness index or pulse pressure: which correlates better with arterial stiffness in resistant hypertension?
MedLine Citation:
PMID:  18633171     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The ambulatory arterial stiffness index (AASI) is a recently proposed index derived from 24-h ambulatory blood pressure monitoring (ABPM) for the evaluation of arterial stiffness. In this cross-sectional study we investigated whether AASI reflects arterial stiffness in patients with resistant hypertension by comparing AASI and ambulatory pulse pressure (PP) with aortic pulse wave velocity (PWV), a measure of arterial stiffness, in 391 resistant hypertensives. Clinical, laboratory and echocardiographic variables, 24-h ABPM and aortic PWV (measured using the Complior device) were obtained. AASI was calculated as 1--the regression slope of 24-h diastolic on systolic blood pressure (BP). Statistical analysis involved single and multiple linear regressions to assess the correlations between the two ABPM variables and PWV, both unadjusted and adjusted for potential confounders (age, gender, body height, presence of diabetes, 24-h mean arterial pressure [MAP], heart rate, and nocturnal BP reduction). Ambulatory PP and aortic PWV were independently associated with age, gender, presence of diabetes, and 24-h MAP, whereas AASI was associated with age, diabetes, and nocturnal diastolic BP reduction. PP showed stronger unadjusted (r=0.39, p<0.001) and adjusted (r=0.22, p<0.001) correlations with aortic PWV than AASI (r=0.12, p=0.032 and r= -0.04, p=0.47, respectively). In the analysis of subgroups stratified by gender, age, presence of atherosclerotic diseases and diabetes, dipping pattern, and ambulatory BP control, the superiority of PP over AASI was apparent in all subgroups. In conclusion, 24-h ambulatory PP was better correlated to arterial stiffness, as evaluated by aortic PWV, than the novel AASI, in patients with resistant hypertension.
Authors:
Elizabeth S Muxfeldt; Roberto Fiszman; Carlos Henrique Castelpoggi; Gil F Salles
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hypertension research : official journal of the Japanese Society of Hypertension     Volume:  31     ISSN:  0916-9636     ISO Abbreviation:  Hypertens. Res.     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-07-17     Completed Date:  2008-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9307690     Medline TA:  Hypertens Res     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  607-13     Citation Subset:  IM    
Affiliation:
Hypertension Program, University Hospital Clementino Fraga Filho, Medical School, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. bethmux@globo.com
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MeSH Terms
Descriptor/Qualifier:
Aged
Aorta / physiology,  ultrasonography
Aortic Diseases / diagnosis,  physiopathology,  ultrasonography
Blood Pressure*
Blood Pressure Monitoring, Ambulatory*
Cross-Sectional Studies
Female
Humans
Hypertension / diagnosis*,  physiopathology*,  ultrasonography
Linear Models
Male
Middle Aged
Pulsatile Flow*
Severity of Illness Index

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


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