- ARTERY 18 Poster Session
- Poster Session II - Hypertension VI
- Open access
- Published:
P125 Estimation of Mean Arterial Pressure in Non-Invasive Studies
Artery Research volume 24, pages 115–116 (2018)
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 [2–3] 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.
References
Bos et al. J Hypertens 2007;25:751–5.
Park et al. J Hypertens 2014;32:865–72.
Costello et al. Am J Hypertens 2015;28(4):480–6.
Picone et al. J Am Coll Cardiol. 2017;70(5):572–86.
Author information
Authors and Affiliations
Rights and permissions
This is an open access article distributed under the CC BY-NC license https://doi.org/creativecommons.org/licenses/by/4.0/.
About this article
Cite this article
Park, C., Tillin, T., Chaturvedi, N. et al. P125 Estimation of Mean Arterial Pressure in Non-Invasive Studies. Artery Res 24, 115–116 (2018). https://doi.org/10.1016/j.artres.2018.10.178
Published:
Issue Date:
DOI: https://doi.org/10.1016/j.artres.2018.10.178