Sentence examples for reflection sites from inspiring English sources
Our numerical results are also consistent with the horizon effect hypothesis (13), which states that aortic reflected waves are an amalgam of individual reflections from multiple reflection sites, with the nearer site contribution at full strength and sites further away having their contributions attenuated.
However, other studies suggested that there are no precise reflection sites in the arterial system [ 6].
This result suggests that individual distal reflection sites affect less the shape of the central pressure wave with hypertension.
Conversely, the reduced vessel area and increased stiffness found in the vasoconstricted state creates reflection sites with positive reflection coefficients and results in compressive reflections.
Reducing the number of segments also enables us to investigate the effect of arterial network topology (and hence reflection sites) on the shape of waveforms.
In normal PAs, the increasing total vessel area at each bifurcation results in reflection sites with predominately negative reflection coefficients and consequent backward expansion waves.
In this article it is suggested that the implantation of an aortic stent-graft exerts its immediate effects not only by interposing extra stiffness on the infrarenal segment but by also modifying the pulse wave reflection site and changing the aortic flow field without necessarily causing significant alterations in PWV.
Interestingly, in our study the reflection site of the BCW was ∼2 3 cm from the site of measurement in the branch PAs (based on wave timing and PWV).
On the contrary, a distal shift of reflection site has been observed by Mitchell et al. [ 9], but others reported that this distal shift was only observed from subjects older than 65 years [ 7].
Under the assumption of a non-dispersive sample (i.e. equal group and phase delays to the reflection site), this corresponds to the difference between the round-trip group and phase delays of the DODL.
In addition, this methodology enables the analysis of the effect of network topology and, hence, reflections sites on the shape of pressure and flow waves.
