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Aortic-to-brachial artery stiffness gradient is not blood pressure independent

Citation

Armstrong, MK and Schultz, MG and Picone, DS and Sharman, JE, Aortic-to-brachial artery stiffness gradient is not blood pressure independent, Journal of Human Hypertension, 33, (5) pp. 385-392. ISSN 0950-9240 (2019) [Refereed Article]

Copyright Statement

Copyright 2019 Springer Nature Limited

DOI: doi:10.1038/s41371-018-0154-y

Abstract

Aortic stiffness predicts cardiovascular mortality but is limited as a risk marker because it is dependent on blood pressure (BP). A potential solution is provided from the ratio of aortic-to-brachial artery stiffness (ab-ratio), which has been shown to be a BP-independent risk marker among patients with renal dysfunction (RD). We sought to determine the BP independence of the ab-ratio in patients with disease, including RD, and healthy populations. The ab-ratio (aortic/brachial pulse wave velocity) and mean arterial pressure (MAP) were recorded in patients with RD (n = 119, aged 65  7 years), hypertension (n = 140, aged 62  9 years), type 2 diabetes mellitus (n = 77, aged 60  9 years) and healthy subjects (n = 99, aged 51  8 years). Multiple-regression analysis was performed to test the independent association of MAP with the ab-ratio adjusted for age, sex, body mass index, glucose and heart rate. There was no significant relationship between the ab-ratio and MAP in patients with RD (β = 0.08, p = 0.34), hypertension (β = 0.04, p = 0.62) or diabetes (β = 0.22, p = 0.11). However, among healthy subjects the ab-ratio was significantly and independently associated with MAP (β = 0.31, p = 0.003). There was a significant difference in the strength of association between the ab-ratio and MAP between patients with disease and healthy subjects (z > 2.2, p < 0.05 all). Although ab-ratio is purported to be a risk marker that is independent of BP, this was observed only among patient populations, and not among healthy subjects. As a result, the ab-ratio has limited potential as a screening tool for the clinical assessment of arterial stiffness in otherwise healthy individuals.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
UTAS Author:Armstrong, MK (Mr Matthew Armstrong)
UTAS Author:Schultz, MG (Dr Martin Schultz)
UTAS Author:Picone, DS (Mr Dean Picone)
UTAS Author:Sharman, JE (Professor James Sharman)
ID Code:132982
Year Published:2019
Deposited By:Menzies Institute for Medical Research
Deposited On:2019-05-29
Last Modified:2019-06-06
Downloads:0

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