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final-review 11
neuro6 CVA
Question | Answer |
---|---|
Primary Risk Factors CVA | Hypertension,Heart disease, Diabetes mellitus, Cigarette smoking, Transient ischemic attacks |
Secondary Risk Factors CVA | Obesity High ,cholesterol ,Behaviors related to hypertension, Physical inactivity, Increased alcohol consumption |
Completed Stroke | A CVA that presents with total neurological deficits at the onset. |
Stroke in Evolution | usually caused by a thrombus that gradually progresses. Total neurological deficits are not seen for one to two days after onset. |
Ischemic Stroke | Once there is a loss of perfusion to a portion of the brain (within just seconds) there is a central area of irreversible infarction surrounded by an area of potential ischemia. |
Embolic CVA | Associated with cardiovascular disease, an embolus may be a solid, liquid or gas, and can originate in any part of the body. |
The embolus travels . | through the bloodstream to the cerebral arteries causing occlusion of a blood vessel and a resultant infarct |
The middle cerebral artery is | most commonly affected by an embolus from the internal carotid arteries. |
Due to the sudden onset of occlusion, | tissues distal to the infarct can sustain higher permanent damage than those of thrombotic infarcts. |
An embolic CVA | occurs rapidly with no warning, and often presents with a headache. |
Common cardiac disorders that can lead to embolism include | valvular disease (i.e., rheumatic mitral stenosis), ischemic heart disease, acute myocardial infarction, arrhythmias (i.e., atrial fibrillation), patent foramen ovale, cardiac tumors, and post cardiac catheterization. |
Thrombotic CVA | An atherosclerotic plaque develops in an artery and eventually occludes the artery or a branching artery causing an infarct. |
Thrombotic CVA is | extremely variable in onset where symptoms can appear in minutes or over several days. |
A thrombotic CVA . | usually occurs during sleep or upon awakening, after a myocardial infarction or post-surgical procedure |
Hemorrhagic CVA An abnormal bleeding | in the brain due to a rupture in blood supply. The infarct is due to disruption of oxygen to an area of the brain and compression from the accumulation of blood. |
Hypertension is usually | a precipitating factor causing rupture of an aneurysm or arteriovenous malformation. |
Trauma can also precipitate | hemorrhage and subsequent CVA. |
Characteristics of a hemmoragic CVA include . | severe headache, vomiting, high blood pressure, and abrupt onset of symptoms |
Hemorrhage usually occurs | during the day with symptoms evolving in relation to the speed of the bleed. |
Approximately 50% of deaths from hemorrhagic stroke occur | within the first 48 hours. |
transient ischemic attack | is usually linked to an atherosclerotic thrombosis. There is a temporary interruption of blood supply to an area. T |
he effects of TIA may be similar to a CVA, but | symptoms resolve quickly. A TIA most often occurs in the carotid and vertebrobasilar arteries and may indicate future CVA. |