Blocked heart artery

Blocked heart artery


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Coloured arteriograph (angiograph) of the human heart, showing multiple stenoses (obstructions) in the left coronary artery (top right of heart on image). Unaffected blood vessels appear as continuous pink ribbons; the stenosed artery has a small diameter with a consequently reduced blood flow (ischaemia). The obstruction is due to formation of fatty atheroma plaques on the arterial wall; the presence of a blood clot (thrombosis) in such an obstructed region could lead to the total blockage of the artery and subsequent death of the section of heart muscle it services - an event known as an acute myocardial infarction or heart attack.

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