Left coronary artery. Coloured coronarography (contrast medium X-ray) scan of the healthy left coronary artery of a 58-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 right anterior oblique view, showing the circumflex branch of the left coronary artery and part of the same artery's anterior interventricular branch.
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