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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Hypertension. 2010 Jan 11;55(3):799–805. doi: 10.1161/HYPERTENSIONAHA.109.139964

Figure 1.

Figure 1

Definition of carotid waveform analysis parameters. Upper panel shows an example of carotid pressure wave (solid line) and the constructed triangular flow wave (dotted line) by the triangulation method. Lower panel shows the separated forward pressure wave (solid line) and backward pressure wave (dotted line). AI = augmentation index; cPP = central pulse pressure; Pi = incident pressure wave height from foot to the inflection point; Pa = augmented pressure; Pb = amplitude of the backward pressure wave; Pf = amplitude of the forward pressure wave; RI = reflection index; RWTT = reflected wave transit time.