DEFINITION: rapid occurrence of neurological dysfunction that results from impeded vascular blood flow to the brain. This incident results from one of two types of stroke: ischemic (arterial occlusion) or hemorrhagic (arterial rupture and bleeding). The part(s) of the brain affected can suffer permanent or temporary damage, leading to deficit(s) in associated functions. Impairment can be slight to severe, or even fatal. RELATED DIAGNOSTIC TESTS: various tests are used to assess the type and size of a stroke: - CT scan - MRI - EEG - radionuclide scan - angiography - CSF draw ETIOLOGY: Nonmodifiable risk factors: gender (male), age (65+ years), race (AfricanAmerican) and heredity. Modifiable risk factors: hypertension, cardiac disease, diabetes mellitus, serum lipid deviations, smoking, diet. MEDICAL MANAGEMENT: Prevention: anticoagulant tx (Heparin, Coumadin, ASA, Persantine, Ticlid) in case of potential infarction; carotid endarterectomy, extracranial-intracranial bypass and transluminal angioplasty are surguries to maintain arterial blood flow. Acute: maintain a patent airway and breathing (O2, intubation, mechanical ventilator); hyperosmotic agents to reduce cerebral edema; surgical repair of cerebral hemorrhage. PATHOPHYSIOLOGY: Vascular flow of blood to the brain is impeded by either ischemic or hemorrhagic stroke. In the former a thrombosis (blood clot) or embolus (usually cardiac plaque or tissue) occludes the lumen of a cerebral artery. The latter results from the rupturing of a cerebral vessel and bleeding into brain tissue or ventricles. The stroke can be classified based on neurological deficits: - transcient ischemic attack (TIA) - deficits are temporary, lasting only minutes or up to 24 hours. - reversible ischemic attack - deficits are temporary, but last days to weeks. - evolution - progressive deterioration of neurological dysfunction over hours or days. - completed - deficits remain unchanged after 2-3 days. NURSING MANAGEMENT: - maintain patent airway - monitor s/s stroke in evolution or intracranial pressure: change if LOC, eye response, motor abilities, mental function, VS - monitor for fluid overload: edema I&O - minimize risk of thrombophlebitis: range-of-motion exercises, compression stockings, admin. anticoagulant meds - prevention of contractures, atrophy: positioning, range-of-motion exercises - monitor change in integumen, circulation - monitor changes in GI / GU function - assist patient in understanding effects of illness and in performing ADL’s; monitor coping ability - direct rehabilitation: prevent deformity, maintain & restore function; assist in family teaching - incorporate health care team into rehabilitation (eg: PT, OT, D/C nurse, dietician) SIGNS & SYMPTOMS: symptoms vary greatly as they are dependent on the stroke’s site, size and rate, and on the presence of collateral circulation. Listed are broad categories: - neuromotor: akinesia, hypo- or hyperrefexia, dysphagia, bladder and bowel dysfunction - communication: aphasia - affective: loss of control of emotion - cognitive: impaired judgement and memory - perception: impaired spatial orientation HEALTH DEVIATION SELF-CARE REQUISITES: - follow prescibed, preventative medical treatment - adhere to physical, cognitive therapies to improve function - maintain prescribed exercise program - follow strict diet regimen - be alert to impending symptoms of another stroke (eg: headache, vertigo, numbness, visual problems, emotional lability) REFERNCE PAGES: - Lewis & Collier, Medical-Surgical Nursing, 4th Ed., p. 1723-1748 - Dirksen, Lewis & Collier, Clinical Companion to Medical-Surgical Nursing, p. 101-112