Artery stenosis. Coloured angiogram (X-ray) of stenosis (narrowing,centre) of the carotid artery (red) in the neck. Arterial stenosis can be due to atherosclerosis,the build-up of fatty material on an arterial wall,or thrombosis,the formation of a clot in an undamaged artery. It can also result from an embolism,which occurs when a particle or gas bubble that was moving through the artery becomes trapped. The decreased blood flow to the brain may cause a stroke. Angiograms are produced by injecting an X-ray opaque dye into the blood vessel to be studied | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Zephyr |
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