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Synthesized aortic pressure waves in a subject (age 62 years) with a “normal” arterial pressure gradient and one (age 79 years) with a “reversed” arterial pressure gradient. AP is augmentation pressure (reflected wave amplitude) and Tr is the round trip travel time of the forward wave from the ascending aorta to the major “effective” reflection site and back. Pi is the inflection point or upstroke of the reflected wave.
