BSIP, GONDELON / SCIENCE PHOTO LIBRARY BSIP, GONDELON / SCIENCE PHOTO LIBRARY
Heart bypass graft. Coloured 3D computed tomography (CT) scan of a heart (red) that has had a blockage of the coronary arteries treated by coronary artery bypass graft (CABG) surgery. The large artery leaving the heart at left (cream) is the aorta, the main body artery. Attached to it is a large graft (thinner tube) that has been attached to bypass a blockage in the coronary arteries. These arteries, running across the surface of the heart, supply oxygenated blood to keep the heart muscle pumping, and a blockage can cause a fatal heart attack. CT scanning uses X-ray beams to scan the body. Computers are then used to create a 3D image of the area scanned.
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