NUR 3225 Study Guide - Midterm Guide: Carotid Endarterectomy, Idiopathy, Tinnitus
Document Summary
Stroke occurs when ischemia or hemorrhage into the brain results in death of brain cells. 4th most common cause of death in us. Risk factors can be divided into nonmodifiable and modifiable risks. Transient episode of neurologic dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute infarction of the brain. Strokes are classified on the basis of underlying pathophysiologic findings. Thrombosis occurs in relation to injury to a blood vessel wall and formation of a blood clot. Result of narrowing of the blood vessel. Occurs when an embolus lodges in and occludes a cerebral artery. Results in infarction and edema of the area supplied by the vessel. Onset of embolic stroke is usually sudden and may or may not be related to rapid occurrence of severe clinical symptoms. activity. Patient usually remains conscious, although he may have a headache. Result from bleeding into the brain tissue itself or into the subarachnoid space or ventricles.
