ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Coronary artery stenosis. Coloured coronarography (contrast medium X-ray) scan of a 59-year-old woman's heart, showing a narrowing (stenosis) of the circumflex branch of the left coronary artery. Coronary arteries supply the heart muscle with blood, and narrowing and blockages in these arteries can lead to a heart attack. This is a right anterior oblique view.
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