SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Coloured three-dimensional Computed Tomography (CT) angio scan of the heart of a 63 year old patient, showing triple (three) coronary artery bypass grafts. The small (light blue) vessels are the grafts replacing blocked coronary arteries, seen running from the large aorta. Without this procedure a blocked coronary artery can cause a heart attack.
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