Arterial pressure: agreement between a brachial cuff-based device and radial tonometry.

Abstract:

OBJECTIVES:Aortic (central) blood pressure (BP) differs from brachial BP and may be a superior predictor of cardiovascular events. However, its measurement is currently restricted to research settings, owing to a moderate level of operator dependency. We tested a new noninvasive device in a large UK cohort. The device estimates central BP using measurements obtained with an upper arm cuff inflated to suprasystolic pressure. We compared these estimates with those obtained using radial tonometry as well as with invasively acquired measurements of aortic BP in a limited number of individuals. METHODS:Consecutive cuff-based and tonometry-based estimates of the pressure waveform and the central BP were obtained from 1107 individuals (70 ± 6 years). Short-term and long-term reproducibility studies were performed on 28 individuals. Simultaneous cuff-based and invasively measured pressure traces were acquired and compared in an additional six individuals (65 ± 20 years). RESULTS:Central systolic BP, as estimated by the cuff-based device, was found to be highly reproducible (coefficient of variation 4 and 8% for short and long-term reproducibility, respectively) and was comparable to that estimated by tonometry (average difference 3 ± 6  mmHg, intraclass correlation coefficient = 0.91). The cuff-based pressure waveforms were similar to those acquired invasively (cross-correlation coefficient 0.93), and the difference in the estimated central systolic BP was -5 ± 8  mmHg (P = 0.2). CONCLUSION:Cuff-based devices show promise to simplify the measurement of central BP, whilst maintaining a similar fidelity to tonometry. This could lead to improved adoption of estimates of central BP in clinical practice.

journal_name

J Hypertens

journal_title

Journal of hypertension

authors

Park CM,Korolkova O,Davies JE,Parker KH,Siggers JH,March K,Tillin T,Chaturvedi N,Hughes AD

doi

10.1097/HJH.0000000000000082

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

865-72

issue

4

eissn

0263-6352

issn

1473-5598

journal_volume

32

pub_type

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