what causes cerebrovascular accident (cva) due to stenosis of artery
If the CVA is caused by an occlusion, narrowing, or stenosis of a precerebral artery, a code from category 433 is assigned. Common precerebral arteries include the basilar, carotid, and vertebral. The fifth digit of 1 is assigned to show that the occlusion/stenosis caused the CVA.
A CVA may be caused by any of the following: A piece of fatty plaque (debris) that is formed in a blood vessel breaks away and flows through the bloodstream going to the brain. The plaque blocks an artery which causes a stroke. This is called an embolic stroke. A thrombus (blood clot) formed in an artery (blood vessel) and blocked blood flow to the brain. This is called a thrombotic stroke. A torn artery in the brain, causing blood to spill out.
Spontaneous rupture of a blood vessel in the brain causes a hemorrhagic stroke. Another form of cerebrovascular disease includes aneurysms. Cerebral aneurysms can be genetic in nature, due to a wall deformity of the artery.