Stroke and IR

Question 1

What does an infarct look like on CT after 1-6 hours?

Answer 1

loss of gry matter

Question 2

What does an infarct look like on CT after 6 hours-4 days?

Answer 2

swelling

Question 3

What does an infarct look like on CT after 4-14 days?

Answer 3

normal

Question 4

What does an infarct look like on CT after 14 days?

Answer 4

hypodense, brain volume loss

Question 5

What does an infarct look like on MRI after 1 hr-10 days?

Answer 5

bright on diffusion-weighted; same as CT on FLAIR/T2

Question 6

What does DWI show?

Answer 6

new infarcts = very bright; old aren’t seen

Question 7

On an acute infarct perfusion CT, what is a bad prognostic sign?

Answer 7

increased time to start + increased time to peak w/ decreased blood volume

Question 8

On an acute infarct perfusion CT, what is a good prognostic sign (brain at risk- save the brain!)?

Answer 8

increased time to start + increased time to peak w/ increased blood volume

Question 9

What does angiography tell us?

Answer 9

whether a blockage/clot is present and where; perfusion

Question 10

What is the tx of an acute infarct?

Answer 10

clot = TPA, cath, surg

Question 11

What does an increased time to start + increased time to peak w/ decreased blood volume indicate on CT?

Answer 11

brain can’t be saved

Question 12

What does an increased time to start + increased time to peak w/ increased blood volume indicate on CT?

Answer 12

brain still alive but at risk- save the brain!

Question 13

How can new infarcts be distinguished from old ones?

Answer 13

with DWI