ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Balloon angioplasty. Coloured angiograms (X-rays) of the leg of a 69 year old patient with stenosis (narrowing) of the popliteal artery. The image at right shows the stenosis being treated with balloon angioplasty. A balloon catheter (white tube) has been guided into place by a flexible catheter (white line). Inflating the balloon opens the artery and restores normal blood flow. The most common cause of stenosis is atheroma, fatty deposits that thicken the inner coat of arteries.
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