The Aortic Root
Aorta | Aortic Valve | Aortic Root | Ascending Aorta | Aortic Arch | Descending Aorta | Abdominal Aorta
The aortic root, the first part of the aorta, begins just above the top of the main pumping chamber of the heart (the left ventricle). The root of the aorta includes the aortic valve and the origin of the coronary arteries. This valve prevents blood pumped out of the heart from leaking (or regurgitating) back into the heart when the heart relaxes. The coronary arteries allow blood and oxygen to flow to the heart muscle.
The valvular apparatus of the aorta begins at the aortic annulus and extends to the sinotubular junction. Between each commissure of the aortic valve and opposite the cusps of the aortic valve, there are three small dilatations called the aortic sinuses. The sinotubular junction is the point in the ascending aorta where the aortic sinuses end, and the aorta becomes a tubular structure.
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