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Reliability of oscillometric central blood pressure and central systolic loading in individuals over 50 years: Effects of posture and fasting

Reliability of oscillometric central blood pressure and central systolic loading in individuals over 50 years: Effects of posture and fasting
Reliability of oscillometric central blood pressure and central systolic loading in individuals over 50 years: Effects of posture and fasting

Background and aims The between-day reliability of oscillometric pulse wave analysis has been demonstrated in a young, healthy population but not in an older sample. This study examined the between-day reliability of the SphygmoCor XCEL in individuals over 50 years. As blood pressure is measured in a range of postures and fasting states (supine/seated, fasted/non-fasted), this study also investigated the effect of these variables on central blood pressure and central systolic loading. Methods Fifty-one adults (m = 21; age 57 ± 6.4 y) were tested on three mornings in supine and seated conditions and in fasted and non-fasted states. Data was analysed as a whole and for normotensive (n = 25) and hypertensive participants (n = 26). Results SphygmoCor XCEL demonstrated strong reliability in the whole sample for central systolic and diastolic blood pressures, augmentation index (AIx) and AIx75 (ICC = 0.77–0.95). Significant interaction effects were observed in central diastolic blood pressure, central pulse pressure, augmentation index (AIx) and AIx75 (p < 0.05; ηp 2 = 0.10–0.23). Fasting state had a greater influence on central pressures in a seated than supine posture, but a greater effect on central systolic loading measures in a supine posture. Conclusions The SphygmoCor XCEL is a reliable tool to assess central haemodynamic variables in an older population. It would be pertinent for clinicians and researchers to record central measures in a supine posture to minimise the effects of food consumption. Conversely, the assessment of central systolic loading should occur in a seated condition to minimise the influence of varying fasting states.

Arterial stiffness, Augmentation index, Fasting state, Posture, Pulse wave analysis, Reliability, SphygmoCor XCEL
0021-9150
79-85
Mitchelmore, Andrew
05be4f15-27a1-4b78-be82-2d10fe7c36d1
Stoner, Lee
0f9dd581-205f-490d-8879-7ba7cfa51450
Lambrick, Danielle
1deafa4b-acf3-4eff-83c9-f8274e47e993
Jobson, Simon
708be525-2bdb-43a0-a6ee-1dd666347611
Faulkner, James
1bedc0f0-8fa4-4bf3-8e31-abd084b0c148
Mitchelmore, Andrew
05be4f15-27a1-4b78-be82-2d10fe7c36d1
Stoner, Lee
0f9dd581-205f-490d-8879-7ba7cfa51450
Lambrick, Danielle
1deafa4b-acf3-4eff-83c9-f8274e47e993
Jobson, Simon
708be525-2bdb-43a0-a6ee-1dd666347611
Faulkner, James
1bedc0f0-8fa4-4bf3-8e31-abd084b0c148

Mitchelmore, Andrew, Stoner, Lee, Lambrick, Danielle, Jobson, Simon and Faulkner, James (2018) Reliability of oscillometric central blood pressure and central systolic loading in individuals over 50 years: Effects of posture and fasting. Atherosclerosis, 269, 79-85. (doi:10.1016/j.atherosclerosis.2017.12.030).

Record type: Article

Abstract

Background and aims The between-day reliability of oscillometric pulse wave analysis has been demonstrated in a young, healthy population but not in an older sample. This study examined the between-day reliability of the SphygmoCor XCEL in individuals over 50 years. As blood pressure is measured in a range of postures and fasting states (supine/seated, fasted/non-fasted), this study also investigated the effect of these variables on central blood pressure and central systolic loading. Methods Fifty-one adults (m = 21; age 57 ± 6.4 y) were tested on three mornings in supine and seated conditions and in fasted and non-fasted states. Data was analysed as a whole and for normotensive (n = 25) and hypertensive participants (n = 26). Results SphygmoCor XCEL demonstrated strong reliability in the whole sample for central systolic and diastolic blood pressures, augmentation index (AIx) and AIx75 (ICC = 0.77–0.95). Significant interaction effects were observed in central diastolic blood pressure, central pulse pressure, augmentation index (AIx) and AIx75 (p < 0.05; ηp 2 = 0.10–0.23). Fasting state had a greater influence on central pressures in a seated than supine posture, but a greater effect on central systolic loading measures in a supine posture. Conclusions The SphygmoCor XCEL is a reliable tool to assess central haemodynamic variables in an older population. It would be pertinent for clinicians and researchers to record central measures in a supine posture to minimise the effects of food consumption. Conversely, the assessment of central systolic loading should occur in a seated condition to minimise the influence of varying fasting states.

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Accepted/In Press date: 21 December 2017
e-pub ahead of print date: 27 December 2017
Published date: 1 February 2018
Keywords: Arterial stiffness, Augmentation index, Fasting state, Posture, Pulse wave analysis, Reliability, SphygmoCor XCEL

Identifiers

Local EPrints ID: 418611
URI: https://eprints.soton.ac.uk/id/eprint/418611
ISSN: 0021-9150
PURE UUID: fee3b6f3-ec58-4351-ac4b-212547b0cdf9
ORCID for Danielle Lambrick: ORCID iD orcid.org/0000-0002-0325-6015

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Date deposited: 12 Mar 2018 17:30
Last modified: 14 Mar 2019 05:15

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