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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Hypertension. 2010 Sep 27;56(5):920–925. doi: 10.1161/HYPERTENSIONAHA.110.160549

Figure 1.

Figure 1

Detection of effective reflection site. Tref: the time delay between the systolic foot and the first inflection point of carotid arterial pressure waveform, which corresponds to the double reflected wave transit time; Tcar-fem: the time delay between carotid and femoral artery pressure wave forms; Lav-fem: the arterial length from the aortic valve to the femoral site; Lav-car: the arterial length from the aortic valve to the carotid site; Larch-ref: the arterial length from the top of aortic arch to the effective reflection site. Lav-arch: the arterial length from aortic valve to the top of aortic arch (e.g., the ascending aorta). The effective reflecting distance (ERD) is the combined length of the ascending aortic length and Larch-ref.