Types of CVAs
Terms in this set (13)
a CVA that presents with total neurological deficits at the onset
stroke in evolution
a CVA, usually caused by a thrombus that gradually progresses. Total neurological deficits are not seen for one to two days after onset
once there is a loss of perfusion to a portion of the brain there is a central area of irreversible infarction surrounded by an area. There are two types: embolus and thrombus
20% of ischemic strokes. It is associated with cardiovascular disease and it may be a solid, liquid, or gas, and can originate in any part of the body. It 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 this from the internal carotid arteries.
this type of CVA occurs rapidly with no warning, and often presents with a headache.
an atherosclerotic plaque develops in an artery and eventually occludes the artery or a branching artery causing an infarct. This type of CVA is extremely variable in onset where symptoms can appear in minutes or over several days. This CVA usually occurs during slep or upon awaking, after a myocardial infarction or post-surgical procedure.
10 - 15% of CVAs; 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.
with this type of CVA hypertension is usually a precipitating factor causing rupture of an aneurysm or arteriovenous malformation.
characteristics of this type of CVA include: severe headache, vomiting, high blood pressure, and abrupt onset of symptoms. It usually occurs during the day with symptoms evolving in relation to the speed of the bleed. Appx 50% of deaths from this type of CVA occur within the first 48 hours
transient ischemic attack (TIA)
usually likned to an atherosclerotic thrombosis. There is a temporary interruption of blood supply to an area. The effects may be similar to a CVA, but symptoms resolve quickly. These most often occur in the carotid and vertebrobasilar arteries and may indicate future CVA.
What are the primary risk factors of CVA?
2. heart disease
3. diabetes mellitus
4. cigarette smoking
What are the secondary risk factors of CVA?
2. high cholesterol
3. behaviors related to hypertension
4. physical inactivity
5. increased alcohol consumption