3. Conventional techniques in PWV assessment
Waveform-based techniques applied flow velocity, pressure or diameter
waves for PWV assessment [73]. Techniques utilized either two-site
(Figure 2.) or one-site method for PWV estimation [44]. The former
method includes evaluation of flow velocity at two distinct sites
separated by a measurable distance and the latter applied either
Moens-Korteweg (Eq. 1) [74–77] or Bramwell-Hill equation (Eq. 2)
[78].