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BMC Cardiovascular Disorders

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Open Access 01-12-2019 | Research article

Establishing the interchangeability of arterial stiffness but not endothelial function parameters in healthy individuals

Authors: Raissa Perrault, Alexander Omelchenko, Carla G. Taylor, Peter Zahradka

Published in: BMC Cardiovascular Disorders | Issue 1/2019

Abstract

Background

Development of instruments capable of detecting early stage vascular disease has increased interest in employing arterial stiffness (e.g. pulse wave velocity (PWV), augmentation index (AIx)) and endothelial dysfunction (e.g. reactive hyperemia index (RHI)) to diagnose atherosclerotic disease before occurrence of a cardiovascular event. However, amongst the equipment designed for this purpose, there is insufficient information regarding each of these parameters to establish appropriate cutoffs to distinguish between healthy and unhealthy blood vessels. To address these limitations, the study was designed to establish the upper arterial stiffness and endothelial function thresholds in a healthy population, by comparing the outputs from different instruments capable of measuring PWV, AIx and RHI.

Methods

A systematic comparison of PWV, AIx and RHI was conducted to determine the inter-relationships between these parameters of vascular functionality. Outputs were obtained non-invasively using three instruments, the VP-1000 (VP), SphygmoCor (SC), and EndoPAT (EP), in 40 apparently healthy males and females.

Results

Correlations were found between the brachial-ankle PWV and radial-ankle PWV (by VP and SC), and PWV (VP) with AIx (SC). The interchangeability of these outputs was demonstrated by the Bland Altman test, making it feasible to extrapolate cut-offs for radial-ankle PWV and AIx equivalent to brachial-ankle PWV that signify healthy vessels. In contrast, RHI showed no association with AIx, suggesting these endothelial and arterial parameters are functionally distinct.

Conclusions

It was concluded that it is possible to compare the vascular function outputs of different instruments and identify healthy from unhealthy vessels, even though the approaches for quantifying the underlying physiological processes may differ. In this way, non-invasive determination of arterial function could be a new paradigm for detecting existing early stage asymptomatic atherosclerotic disease in individuals using techniques that are amenable to the clinical setting.

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Title: Establishing the interchangeability of arterial stiffness but not endothelial function parameters in healthy individuals
Authors: Raissa Perrault
Alexander Omelchenko
Carla G. Taylor
Peter Zahradka
Publication date: 01-12-2019
Publisher: BioMed Central
Published in: BMC Cardiovascular Disorders / Issue 1/2019
Electronic ISSN: 1471-2261
DOI: https://doi.org/10.1186/s12872-019-1167-3

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