Aortic pulse wave velocity measured by pulse wave imaging (PWI): A comparison with applanation tonometry

Elsevier BV - Tập 5 - Trang 65-71 - 2011
Jonathan Vappou1,2, Jianwen Luo1, Kazue Okajima3, Marco Di Tullio3, Elisa Konofagou1
1Department of Biomedical Engineering, Columbia University, New York, USA
2LSIIT, UMR 7005 CNRS-Strasbourg University, France
3Department of Medicine, Division of Cardiology, Columbia University, New York, USA

Tóm tắt

Arterial stiffness is a well-established indicator of cardiovascular disease outcome. Pulse Wave Velocity (PWV) is a surrogate for arterial stiffness that is measured either globally using carotid-to-femoral applanation tonometry or locally using biomedical imaging methods. Pulse Wave Imaging (PWI) is an ultrasound-based method for both qualitative visualization of the pulse wave propagation and quantitative estimation of arterial stiffness. The objective of this study is to assess the PWI performance in PWV estimation by comparing local abdominal aortic PWV values obtained by PWI to the carotid-femoral PWV measured by applanation tonometry. A total of 18 subjects (age 18–66, 32.5 ± 14.5) with no history of cardiovascular disease were consecutively tested by both PWI and tonometry. The correlation coefficient r between values estimated with the two methods was found to be equal to 0.68. A linear regression yielded PWVPWI = 1.02* PWVtonometry +0.15. Tukey mean-difference plots indicated that PWVPWI was significantly lower than PWVtonometry (–0.3 m/s) at lower PWV values (PWV ≤ 7 m/s), whereas PWVPWI was significantly higher (+1.4 m/s) than PWVtonometry at higher PWV values (PWV > 7 m/s). Despite the regional nature of the PWVPWI measurements, as opposed to the global PWVtonometry measurements, abdominal PWVPWI and carotid-femoral PWVtonometry values were found to be similar, with an average bias equal to 0.25 m/s. Such a bias and its variation with PWV may be partially explained by both physiological variations of PWV

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Elsevier BV

Tập 5

65-71

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