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Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't
Carotid-Femoral Pulse Wave Velocity Assessed by Ultrasound: A Study with Echotracking Technology.
Ultrasound in Medicine & Biology 2017 June
Described here is a new method for determination of carotid-femoral pulse wave velocity (PWV) based on arterial diameter waveform recording by an ultrasound system. The study was carried out on 120 consecutive patients. Carotid-femoral PWV was determined using a tonometric technique (PWVpp, PulsePen, DiaTecne, Milan, Italy) and an echotracking ultrasound system (PWVet, E-Track, Aloka, Tokyo, Japan). The relationship between PWVpp and PWVet was evaluated by linear regression and Bland-Altman analysis. There was excellent agreement between PWVet and PWVpp (Pearson's r = 0.94, 95% confidence interval: 0.91-0.96, p < 0.0001; PWVet = 0.88 × PWVpp + 0.57). The Bland-Altman plot revealed an offset of -0.33 m/s with limits of agreement from -2.21 to 1.54 m/s. The coefficients of variation for within-subject repeatability between PWVet and PWVpp had were 5.79% and 8.47%, respectively, without significant differences in the Bland-Altman analysis. The results suggest that echotracking technology can provide a reliable estimate of aortic stiffness comparable to that of the tonometric techniques.
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