Blood is then able to enter the space between the inner and outer layers of the vessel, causing narrowing (stenosis) or complete occlusion.

When complete occlusion occurs, it may lead to ischaemia.

Often, even a complete occlusion is totally asymptomatic because bilateral circulation keeps the brain well perfused.

During a complete occlusion of the ventral artery of the spinal cord, it is the only tract spared along with the dorsal columns.

Small-vessel walls are thickened and hyalinized, with luminal narrowing or complete occlusion.

Transmural infarcts extend through the whole thickness of the heart muscle and are usually a result of complete occlusion of the area's blood supply.

An autopsy showed nearly complete occlusion of the main coronary arteries.

There are segments of dilatations with trapped uncoagulated blood between the constrictions before complete occlusion.

In his proposition, Andrew stated that these six keys are essential for a complete and proper occlusion.

This can lead to progressive stenosis (narrowing) or even complete occlusion (blockage) of the involved arteries.