Artery Research

Volume 24, Issue C, December 2018, Pages 115 - 116

P125 ESTIMATION OF MEAN ARTERIAL PRESSURE IN NON-INVASIVE STUDIES

Authors
Chloe Park, Therese Tillin, Nish Chaturvedi, Alun Hughes
MRC Unit for Lifelong Health and Ageing at UCL, Department of Population Science & Experimental Medicine, Institute of Cardiovascular Science, Faculty of Population Health Sciences, UCL, London, UK
Available Online 4 December 2018.
DOI
10.1016/j.artres.2018.10.178How to use a DOI?
Abstract

Background: Mean arterial pressure (MAP) is required for many hemodynamic calculations. Most automated devices do not report MAP and a form factor (FF) is used to estimate it from systolic and diastolic blood pressure (BP). The appropriate choice of FF in the brachial artery is controversial: 0.33 is the traditional value, but invasive measurements report a value of 0.4. [1] Non-invasive studies have provided some support for FF = 0.4 but have usually not measured MAP directly, nor used brachial blood pressure waveforms, or accounted for BP measurement errors. We addressed these issues in a sample of white Europeans drawn from the Southall and Brent Revisited study.

Methods: BP was measured using a Pulsecor device (USCOM). Form factors (FFosc and FFwave) were calculated as (MAP-diastolic BP)/(systolic BP-diastolic BP) using MAPosc calculated by oscillometry and MAPwave calculated as the waveform mean respectively.

Results: Data are mean ± SD of 527 observations (Table 1). FFosc was lower than FFwave and use of FF = 0.4 (MAP0.4) overestimated MAPosc. Allowing for measurement errors based on [23] gave estimates of MAPwave that were more similar to MAPosc.

Conclusions: Measurement errors confound estimation of MAP using FF. Measurement errors vary substantially between devices [4] precluding a single FF for all studies. Non-invasive MAP should be estimated by oscillometric methods.

Open Access
This is an open access article distributed under the CC BY-NC license.

References

1.Bos et al., J Hypertens, Vol. 25, 2007, pp. 751-5.
2.Park et al., J Hypertens, Vol. 32, 2014, pp. 865-72.
3.Costello et al., Am J Hypertens, Vol. 28, No. 4, 2015, pp. 480-6.
4.Picone et al., J Am Coll Cardiol, Vol. 70, No. 5, 2017, pp. 572-86.
Journal
Artery Research
Volume-Issue
24 - C
Pages
115 - 116
Publication Date
2018/12/04
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2018.10.178How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - Chloe Park
AU  - Therese Tillin
AU  - Nish Chaturvedi
AU  - Alun Hughes
PY  - 2018
DA  - 2018/12/04
TI  - P125 ESTIMATION OF MEAN ARTERIAL PRESSURE IN NON-INVASIVE STUDIES
JO  - Artery Research
SP  - 115
EP  - 116
VL  - 24
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2018.10.178
DO  - 10.1016/j.artres.2018.10.178
ID  - Park2018
ER  -