Accuracy of pulse interval timing in ambulatory blood pressure measurement

Kane, Sarah A.; Blake, James R.; McArdle, Frank J.; Langley, Philip; Sims, Andrew J.

Abstract

Blood pressure (BP) monitors rely on pulse detection. Some blood pressure monitors use pulse timings to analyse pulse interval variability for arrhythmia screening, but this assumes that the pulse interval timings detected from BP cuffs are accurate compared with RR intervals derived from ECG. In this study we compared the accuracy of pulse intervals detected using an ambulatory blood pressure monitor (ABPM) with single lead ECG. Twenty participants wore an ABPM for three hours and a data logger which synchronously measured cuff pressure and ECG. RR intervals were compared with corresponding intervals derived from the cuff pressure tracings using three different pulse landmarks. Linear mixed effects models were used to assess differences between ECG and cuff pressure timings and to investigate the effect of potential covariates. In addition, the maximum number of successive oscillometric beats detectable in a measurement was assessed. From 243 BP measurements, the foot landmark of the oscillometric pulse was found to be associated with fewest covariates and had a random error of 9.5 ms. 99% of the cuff pressure recordings had more than 10 successive detectable oscillometric beats. RR intervals can be accurately estimated using an ABPM.

Citation

Kane, S. A., Blake, J. R., McArdle, F. J., Langley, P., & Sims, A. J. (2016). Accuracy of pulse interval timing in ambulatory blood pressure measurement. Scientific reports, 6(1), Article 37472. https://doi.org/10.1038/srep37472

• Journal Article Type: Article
• Acceptance Date: Oct 26, 2016
• Online Publication Date: Nov 23, 2016
• Publication Date: 2016-12
• Deposit Date: Nov 1, 2016
• Publicly Available Date: Nov 23, 2016
• Journal: Scientific reports
• Print ISSN: 2045-2322
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 1
• Article Number: 37472
• DOI: https://doi.org/10.1038/srep37472
• Keywords: Blood pressure measurement, Pulse interval timing
• Public URL: https://hull-repository.worktribe.com/output/444755
• Publisher URL: http://www.nature.com/articles/srep37472
• Additional Information: This is a description of an article which has been accepted for future publication in: Scientific reports, 2016, v.6.
• Contract Date: Nov 1, 2016