Stroke I Flashcards
What is the definition of stroke?
Sudden change in neurological function d/t a disruption of blood flow to a region of brain tissue resulting in cell death
What is the definition of a TIA?
Stroke process without cell death
True or false: Time is not an element of the definition of a TIA or stroke
True
What percent of strokes are hemorrhagic? Ischemic?
15% = hemorrhagic 85% = ischemic
True or false: a lot of medicine is consensus based
True
What percent of strokes are SAH? ICH?
ICH = 10% SAH= 5%
What is the most common cause of ischemic strokes?
Idiopathic / cryptogenic
What percent of strokes are 2/2 a.fib?
15%
What are the three components of Virchow’s triad?
- Stasis/turbulence
- Hypercoagulability
- Endothelial damage
Are lacunar strokes 2/2 small or large vessels?
Small
What is moyamoya disease?
Gradual occlusion of the internal carotid artery, causing formation of collateral vessels, that looks like a puff of smoke. Usually results in multiple CVAs or TIAs
What is the association between migraines and strokes?
May be related to migraines with auras
What are lacunar strokes?
Subcortical strokes from deep penetrating blood vessels in the brain
What are the lenticulostriate arteries?
Branches from the middle cerebral artery that feed the caudate, internal capsule, thalamus, and lentiform nucleus
What comprises the lentiform nucleus?
Putamen and the globus pallidus
The vertebral arteries come together to form what vessel?
Basilar
What are the three vessels that feed the thalamus?
- Lenticulostriate
- Thalamoperforating
- Pontine paramedian
What are the types of lacunar strokes? (5)
- Pure motor
- Pure sensory
- Mixed
- Clumsy hand dysarthria
- Ataxia hemiparesis
True or false: ataxia is independent of weakness
True–weakness = dyssynergia
Most of the time, strokes are not stereotypical. What does this mean?
Strokes do recur with the same s/sx
When do stuttering strokes occur?
When the same vessel is occluded
What is lipohyalinosis?
Small vessel disease of the brain d/t endothelial dysfunction and necrosis of the vessels, and eventual occlusion
What are the three risk factors for lipohyalinosis?
- Age
- HTN
- DM