ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Coloured digitised angiogram (X-ray) of arteries near the heart in a 63 year old patient, showing narrowing (stenosis, arrows) of the left subclavian artery that leads off the large aorta (at bottom) from the heart. This narrowing was caused by atherosclerosis, fatty deposits on the wall of the artery.
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