It's not an infarct either. It's an extrinsic stenosis which, as depicted, wouldn't be enough to cause thrombosis and even if it was tight enough - the thrombus would form downstream of the restriction until occlusion of the artery, rather than forming like a dam.

An infarct would be the damage to the tissue caused by ischaemia, as a result of loss of arterial supply.

What OP needs is an image of atherosclerosis, preferably in a coronary artery.