ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Heart surgery. Harvested vein (pink tube, upper centre) that has been attached to the wall of the main body artery (the aorta). Bright red blood is seen leaking from the join prior to the tightening of the final stitches. This is coronary artery bypass graft (CABG) surgery. The vein has been removed from elsewhere in the body (normally the legs). The other end of the vein will be attached to one of the coronary arteries that supply blood to the heart. The grafted vein will bring blood to the heart, bypassing a blockage in the coronary artery. Such blockages arise from atherosclerosis, the build-up of fatty deposits, including cholesterol, on the lining of the arteries.
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