کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10432846 910261 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical assessment of time-domain methods for the estimation of local arterial pulse wave speed
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Numerical assessment of time-domain methods for the estimation of local arterial pulse wave speed
چکیده انگلیسی
A local estimation of pulse wave speed c, an important predictor of cardiovascular events, can be obtained at arterial locations where simultaneous measurements of blood pressure (P) and velocity (U), arterial diameter (D) and U, flow rate (Q) and cross-sectional area (A), or P and D are available, using the PU-loop, sum-of-squares (∑2), lnDU-loop, QA-loop or new D2P-loop methods. Here, these methods were applied to estimate c from numerically generated P, U, D, Q and A waveforms using a visco-elastic one-dimensional model of the 55 larger human systemic arteries in normal conditions. Theoretical c were calculated from the parameters of the model. Estimates of c given by the loop methods were closer to theoretical values and more uniform within each arterial segment than those obtained using the ∑2. The smaller differences between estimates and theoretical values were obtained using the D2P-loop method, with root-mean-square errors (RMSE) smaller than 0.18ms−1, followed by averaging the two c given by the PU- and lnDU-loops (RMSE <2.99ms−1). In general, the errors of the PU-, lnDU- and QA-loops decreased at locations where visco-elastic effects were small and nearby junctions were well-matched for forward-travelling waves. The ∑2 performed better at proximal locations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 44, Issue 5, 15 March 2011, Pages 885-891
نویسندگان
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