ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Left coronary artery network. Coloured coronarography (contrast medium X-ray) scan of the healthy left coronary artery network of a 52-year-old man's heart. Coronary arteries supply the heart muscle with blood, and narrowing and blockages in these arteries can lead to a heart attack. This is a caudal view, showing the circumflex and anterior interventricular branches.
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