PR. J.R. LUSSON / CNRI / SCIENCE PHOTO LIBRARY PR. J.R. LUSSON / CNRI / SCIENCE PHOTO LIBRARY
Heart valve balloon dilatation, X-ray. Angiogram of a balloon catheter (dark, centre right) being used to dilate the mitral valve of a heart. Here, the mitral valve had become narrowed due to atherosclerosis, the build up of fatty plaques (atheroma).
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