BSIP, GONDELON / SCIENCE PHOTO LIBRARY BSIP, GONDELON / SCIENCE PHOTO LIBRARY
Heart bypass grafts. Coloured 3D computed tomography (CT) scan of a heart (orange) that has had a blockage of the coronary arteries treated by coronary artery bypass graft (CABG) surgery. The large artery (yellow) leaving the heart at left is the aorta, the main body artery. Attached to it are grafts (thin tubes) that have 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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