NUR 290 Lecture Notes - Lecture 30: Transient Ischemic Attack, Atrial Fibrillation, Intracranial Aneurysm
Document Summary
It is a condition that develops when blood rich in oxygen can not reach brain cells (due to either a blockage or bleeding). Ischemic (most common): due to a blood clot within a blood vessel or stenosis of an artery that feeds the brain tissue. This limits the blood that can reach the brain cells. This type of stroke can happen due to: embolism: where a clot has left a part of the body (example the heart: this can happen due to a heart valve problem or atrial fibrillation). The clot develops in the heart and travels to the brain, which stops blood flow: thrombosis: clot forms within the artery wall within the neck or brain. This is seen in patients with hyperlipidemia or atherosclerosis. Hemorrhagic: this occurs when there is bleeding in the brain due to a break in a blood vessel. Therefore, no blood will perfuse to the brain cells.
