Aortic sinus
（重定向自Sinus aortae）
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An aortic sinus is one of the anatomic dilations of the ascending aorta, which occurs just above the aortic valve. These widenings are between the wall of the aorta and each of the three cusps of the aortic valve.
There are generally three aortic sinuses: the left, the right and the posterior sinuses: