Document Detail


Arterial stiffness and pulse-pressure amplification in overweight/obese African-American adolescents: relation with higher systolic and pulse pressure.
MedLine Citation:
PMID:  23382323     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Obesity is associated with a higher systolic blood pressure (BP) and pulse pressure (PP) in African-American youths, increasing their risk for developing hypertension. However, it is unknown whether arterial stiffness and wave reflection are associated with a higher systolic BP and PP or with smaller PP amplification in overweight/obese (OW/OB) African-American adolescents.
METHODS: We measured carotid-femoral pulse wave velocity (CF-PWV), carotid-radial PWV (CR-PWV), the augmentation index (AIx) adjusted to a heart rate of 75 bpm (AI75), the augmentation pressure (AugP), PP amplification, and body composition in 227 healthy African-American adolescents (age, 16.9 ± 0.2 years; 54% male).
RESULTS: Adolescents who were OW/OB (n = 86, body mass index (BMI) ≥ 85th percentile) demonstrated 5%-6%, 13%-16%, and 2.5% higher aortic and brachial systolic BP, brachial and aortic PP, and mean arterial pressure (MAP), respectively (all P < 0.05), than adolescents of normal-weight (NW, n = 141, BMI < 85th percentile). The OW/OB adolescents had a 7% higher CF-PWV, 5% lower CR-PWV, and 3.5% lower PP amplification than the NW group (all P < 0.05), but no differences in AI75 or AugP. In the entire cohort after adjustment for age, sex, heart rate, height, and MAP, CF-PWV was positively correlated, and CR-PWV and PP amplification were negatively correlated, with total and abdominal/hip adiposity. Additionally, CF-PWV, AI75, and AugP were positively correlated with MAP and negatively correlated with PP amplification. CR-PWV, AI75, and AugP were negatively correlated with brachial and aortic PP.
CONCLUSIONS: Higher aortic stiffness is associated with smaller PP amplification with increasing adiposity in African-American adolescents. Whether a reduction in PP amplification predicts increased CVD risk in obese African-American adolescents requires further study.
Authors:
Gary L Pierce; Haidong Zhu; Katherine Darracott; Itoro Edet; Jigar Bhagatwala; Ying Huang; Yanbin Dong
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of hypertension     Volume:  26     ISSN:  1941-7225     ISO Abbreviation:  Am. J. Hypertens.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-02-05     Completed Date:  2013-07-25     Revised Date:  2014-01-09    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  United States    
Other Details:
Languages:  eng     Pagination:  20-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Arterial Pressure*
Blood Pressure / physiology*
Humans
Obesity / physiopathology*
Overweight / physiopathology*
Pulse Wave Analysis
Systole
Vascular Stiffness*
Young Adult
Grant Support
ID/Acronym/Agency:
R01 HL077230-02/HL/NHLBI NIH HHS
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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