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- W2003843713 abstract "To assess the feasibility of measuring pulmonary artery (PA) pulse wave velocity (PWV) in children breathing ambient air and 12% oxygen.Velocity-encoded phase-contrast MR images of the PA were acquired in 15 children, aged 9-12years, without evidence of cardiac or pulmonary diseases. PWV was derived as the ratio of flow to area changes during early systole. Each child was scanned twice, in air and after at least 20minutes into inspiratory hypoxic challenge. Intra-observer and inter-observer variability and repeatability were also compared.PA PWV, which was successfully measured in all subjects, increased from 1.31±0.32m/s in air to 1.61±0.58m/s under hypoxic challenge (p=0.03). Intra- and inter-observer coefficients of variations were 9.0% and 15.6% respectively. Good correlation within and between observers of r=0.92 and r=0.72 respectively was noted for PA PWV measurements. Mean (95% limit of agreement) intra- and inter-observer agreement on Bland-Altman analysis were -0.02m/s (-0.41-0.38m/s) and -0.28m/s (-1.06-0.49m/s).PA PWV measurement in children using velocity-encoded MRI is feasible, reproducible and sufficiently sensitive to detect differences in PA compliance between normoxia and hypoxia. This technique can be used to detect early changes of PA compliance and monitor PAH in children." @default.
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- W2003843713 date "2013-12-01" @default.
- W2003843713 modified "2023-09-24" @default.
- W2003843713 title "Assessment of pulmonary artery pulse wave velocity in children: An MRI pilot study" @default.
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- W2003843713 doi "https://doi.org/10.1016/j.mri.2013.08.006" @default.
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