Assertion: ischemic penumbra | /r/CapableOf | prolong mtt
Facets:
value: importantly,
type: DEGREE
Source sentences:
text: The ischemic penumbra, which in most cases surrounds the infarct core, also has prolonged MTT or Tmax but in contrast, has only moderately reduced CBF and, importantly, near-normal or even increased CBV (due to autoregulatory vasodilatation) 1-3 (see figure 2).