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Abstract

Apparatus is provided including an element shaped so as to define at least one surface. The element is adapted to be implanted in an ascending aorta of a subject in a vicinity of an aortic valve, and, during systole, to store, as potential energy, work applied to the surface by blood of the subject passing through the element. The element allows at least 75% of the blood passing into the element during systole of each cardiac cycle to exit the element during systole of the respective cardiac cycle. The element applies the stored energy to push blood towards at least one coronary artery of the subject during diastole. For some applications, the surface includes a first surface, and the element is shaped so as to define a second surface, which is configured to apply the stored energy. Other embodiments are also described.

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First Claim