Vascular

Question 1

What are lacunar infarcts?

Answer 1

small lesions produced by occlusion of deep perforating arteries. Lacune is a venerable pathologic term indicating a fluid-filled hole in the brain

Question 2

% of TIA pts that eventually have a cerebral infarction?

Answer 2

20% within one month of TIA

Question 3

limitations of CT in eval of stroke?

Answer 3

It does not reliably detect infarcts of less than 4 hours’ duration and the extent of the infarct is often difficult to characterize.
Acute lacunar infarcts often go undetected and are typically impossible to distinguish from chronic lacunar infarcts.

Question 4

Overall detection rates for acute infarction in the first 24 hours?

Answer 4

approximately 58%

Question 5

T2-weighted FLAIR scans have how much sensitivity within the first 24 hours of stroke?

Answer 5

85%