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Augmentation Index (AIx) is related to cardiovascular diseases, risk, and mortality. AIx is associated with heart rate but the effect of aortic stiffness on this relationship has not been studied. The purpose of our study was to investigate the relationship between AIx and heart rate at different aortic stiffness levels.

The Effect of Heart Rate on Wave Reflections May Be Determined by the Level of Aortic Stiffness: Clinical and Technical Implications