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PLoS One. 2015 Jan 22;10(1):e0116862. doi: 10.1371/journal.pone.0116862. eCollection 2015.

Comparison of an oscillometric method with cardiac magnetic resonance for the analysis of aortic pulse wave velocity.

Author information

1
University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria.
2
Department of Radiology I, Medical University of Innsbruck, Innsbruck, Austria.

Abstract

OBJECTIVES:

Pulse wave velocity (PWV) is the proposed gold-standard for the assessment of aortic elastic properties. The aim of this study was to compare aortic PWV determined by a recently developed oscillometric device with cardiac magnetic resonance imaging (CMR).

METHODS:

PWV was assessed in 40 volunteers with two different methods. The oscillometric method (PWVOSC) is based on a transfer function from the brachial pressure waves determined by oscillometric blood pressure measurements with a common cuff (Mobil-O-Graph, I.E.M. Stolberg, Germany). CMR was used to determine aortic PWVCMR with the use of the transit time method based on phase-contrast imaging at the level of the ascending and abdominal aorta on a clinical 1.5 Tesla scanner (Siemens, Erlangen, Germany).

RESULTS:

The median age of the study population was 34 years (IQR: 24-55 years, 11 females). A very strong correlation was found between PWVOSC and PWVCMR (r = 0.859, p < 0.001). Mean PWVOSC was 6.7 ┬▒ 1.8 m/s and mean PWVCMR was 6.1 ┬▒ 1.8 m/s (p < 0.001). Analysis of agreement between the two measurements using Bland-Altman method showed a bias of 0.57 m/s (upper and lower limit of agreement: 2.49 m/s and -1.34 m/s). The corresponding coefficient of variation between both measurements was 15%.

CONCLUSION:

Aortic pulse wave velocity assessed by transformation of the brachial pressure waveform showed an acceptable agreement with the CMR-derived transit time method.

PMID:
25612307
PMCID:
PMC4303422
DOI:
10.1371/journal.pone.0116862
[Indexed for MEDLINE]
Free PMC Article

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