Stroke-TIA Flashcards
How much of the bodies blood supply goes to the brain?
20% per minute
A ring of vessels connecting the anterior and posterior circulations of the brain
Circle of Willis
If the problem is caused by the heart and lungs, the entire brain is affected
Secondary Cause
If the problem is in the brain, only part of the brain is affected
Primary Cause
Another name for stroke
Cerebrovascular Accident (CVA)
Interruption of blood flow to the brain. Results in loss of brain function.
Stroke
- Most common type of stroke, accounting for more than 80% of strokes
- Results from an embolism or thrombosis
- Symptoms may range from nothing at all to paralysis
- Atherosclerosis in the blood vessels is often the cause
Ischemic Stroke
Plaque forms inside the walls of the blood vessels and may obstruct blood flow
Artherosclerosis
Stroke may cause paralysis of the left side of the body. Usually patients can understand language and are able to speak, but their words may be slurred
Right Hemisphere Stroke
Treatment for Stroke
- TPA (must be given within 6 hours of last seen normal period)
- EVT (endovascular therapy)
- Accounts for 10%-20% of strokes
- Results from bleeding inside the brain
- People at high risk include those experiencing stress or exertion
- People at highest risk are those who have very high blood pressure
Hemorrhagic Stroke
A swelling or enlargement of an artery due to weakening of the arterial wall
Aneurysm
- Usually as a result of trauma
- Occurs in 1-3% of head injuries
- LOC changes are sudden because of the vessels involved (arteries)
Epidural Bleed
- Most common type of cranial bleed
- Bleeding is slower, results from venous tears
- Can be traumatic or spontaneous
- Mortality rate is 40-70%
Sub-dural Bleed
- Usually the result of aneurysm rupture
- Mortality rate is 25-40%
Sub Arachnoid Bleed
