ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Coronary stenosis before treatment. Coloured angiogram of the left coronary artery in the heart of a 60-year-old patient, showing severe narrowing (stenosis, upper centre-right) of the proximal anterior interventricular artery. This condition was the cause of a myocardial infarction (heart attack).
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