Stroke Flashcards
Estimated % of population that have a stroke per year
10%
What are 10 examples of modifiable risk factors associated with stroke?
Smoking Activity level BP control Weight Hypertension T2DM Education Atrial fibrilation Alcohol intake Cholesterol
What are 7 examples of non-modifiable risk factors associated with stroke?
Aneurysm Genetics Diabetes Blood disorders Race Low birth weight Increasing age
What are the 5 major causes of ischaemic stroke?
Embolism Blood clots Thrombus Hypertension Diabetes
What are the 5 major causes of haemorrhagic stroke?
Trauma Aneurysm Hypertension Arteriovenous malformation (AVM) Subarrachnoid haemorrhage
What does TIA stand for and mean?
Transient Ischaemic Attack. Causes a temporary interruption to the blood supply to an area of the brain.
What are the two major pairs of arteries that supply the brain?
Right and left carotid arteries
Right and left vertebral arteries
What does FAST stand for?
Face
Arms
Speech
Time
How quickly should a CT scan be performed on a pt with suspected stroke?
Immediately
In a pt going for thrombolysis what drug, what dose over how long?
A tissue plasminogen activator (tPA) such as Alteplase is given at a dose of 0.9mg/kg up to a max dose of 90mg. Administrated as 10% in a bolus over 1 minute to see the effect on the pt. Then the rest given via IV through a pump over 1 hour.
What % of pts will have a permanent disability following stroke?
40-50%
Define the term ischaemia
Inadequate blood supply to an organ or tissue
What % of strokes occur to the under 65 age group?
25%
Which type of stroke isn’t suitable for thrombolysis?
Haemorrhagic
What are 4 contraindications for thrombolysis being given?
Trauma <2weeks
Lumbar puncture <2weeks
Taking anticoagulants
NSAIDS
Define dysphasia/what occurs in dysphasia?
Inability to speak
Define dysphagia/ what occurs in dysphagia?
Inability to swallow
What % of stroke pts aren’t suitable for rehabilitation?
15%
What are the 4 diagnostic criteria for stroke?
Sudden onset
Focal/neurological defects
Vascular origin
Symptoms lasting >24 hours
What may thrombosis occur as a result of?
Large artery atherosclerosis.
What may cause an embolism to occur?
Atrial fibrillation
Prosthetic valves
Post MI
What is the more prevalent type of stroke ischaemic or haemorrhagic?
Ischaemic
Diagnostic criteria for a TIA
Sudden onset
Focal/ cerebral deficit
Vascular origin
Symptoms lasting <24 hours
What are the 5 stages in the mechanism of iscaehemic stroke?
Occlusion of blood vessel Two zones of local injury Ischaemic core <10-20% blood flow, inadequate O2 and glucose supply Death of brain cells known as infarction