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. Author manuscript; available in PMC: 2018 Jun 27.
Published in final edited form as: IEEE Trans Biomed Eng. 2016 Sep 22;64(7):1524–1534. doi: 10.1109/TBME.2016.2612639

Fig. 2.

Fig. 2

Previous linear arterial tube-load model technique for robust estimation of PTT from proximal and distal BP waveforms [Pp (t) and Pd (t)]. The linear model accounts for peripheral wave reflection but assumes constant arterial compliance (top panel). The parameters [Td (PTT), G (gain of reflection coefficient Γ(f)), fc (Γ(f) cutoff frequency)] are estimated by finding the transfer function that optimally fits Pp (t) to Pd (t) (middle panel). PTT [TdMP] is then given as the Td estimate (bottom panel).