Stroke Flashcards
what is ischemia?
decreased blood flow
reversible
what is infarction?
death of tissue due to lack of blood flow
a stroke results in a change in mental function for over ____ hours and evidence of ___ on imaging
24 hours
cerebral ischemia
T/F: there is evidence of ischemia/acute infarction on MRI after a TIA
F
how long does a TIA last?
usually <1 hours (15-20 mins)
can be up to <24 hours
after ____ hours of a TIA, there will be permanent damage
3
when is the risk of stroke highest after a TIA?
1st 30 days
what is the ABCD2 used for?
assess the risk of a stroke in the next 2 days after a TIA
components of the ABCD2
Age ≥ 60
Blood pressure ≥140 SBP or ≥90 DBP
Clinical features unilateral weakness or speech impairment w/o weakness
Duration: ≥ 60 mins (2 pts), 10-59 mins (1)
Diabetes
ABCD2 score:
high risk
moderate
low
high risk = 6-7
moderate = 4-5
low = 0-3
T/F: a sudden loss of consciousness should not happen during a stroke
T
what pattern of numbness is not indicative of a stroke?
both feet
one hand or one foot
stroke is the ___ leading cause of death in US and ____ globally
5th US
2nd global
what is one of the leading causes of serious disability in the US?
stroke
what is the most common ischemic stroke subtype?
undetermined etiology
how does paralysis of conjugate gaze present in an MCA stroke?
look towards lesion (away from weak side)
anterior MCA supplies _____’s area
posterior MCA supplies ____’s area
anterior = Broca’s
posterior = Wernicke’s
ACA stroke sx
LE hemiparesis & hemisensory loss
if bilateral = incontinence
slowness, lack of spontaneity
akinetic mutism (lack motivation)
what does an MCA stroke effect more?
UE and face
language areas
PCA stroke sx
cortical blindness
some contra sensory loss
inability to read
what is the most common cause of cardioembolic infarction?
atrial fibrillation