title: Perfusion-weighted magnetic resonance imaging in acute intracerebral hemorrhage at baseline and during the 1st and 2nd week: a longitudinal study.
abstract: OBJECTIVE
  Ischemic penumbra has been suggested as a contributing mechanism to secondary neuronal injury in intracerebral hemorrhage (ICH). Preliminary data suggest the presence of perihematomal hypoperfusion within the first hours after acute ICH. Our objective was to elucidate perfusion changes in the perihematomal region over time using magnetic resonance imaging (MRI).
  
  
  METHODS
  Two perfusion-weighted MRIs were studied prospectively in 18 ICH patients. All patients had an acute perfusion-weighted MRI within 24 h of the onset of symptoms (time 0); 11 patients had a follow-up study on day 7 (time 1), and 7 patients on days 10-14 (time 2). The region of interest (ROI) was placed over the penumbral area, on high-intensity FLAIR and perfusion overlapping map imaging. Clinical data were assessed at baseline (National Institutes of Health Stroke Scale) and on day 90 (Canadian Scale, modified Rankin Scale).
  
  
  RESULTS
  The average hematoma volume was 56 (9-140) ml; 10 were located deeply, and 8 were lobar. When we compared the perfusion changes (mean transit time prolongation) in the perihematomal area (lesion ROI) relative to itself over time, we found significant differences only between times 0 and 2 (p = 0.05). There were also significant differences in mean transit time between the lesion ROI and the contralateral mirror ROI in the baseline study (p = 0.001), with a trend to significance for time 1.
  
  
  CONCLUSIONS
  Our data confirm the presence of hypoperfusion around an acute ICH and demonstrate that this change disappears completely after the first week. These data suggest that further evaluation of this feature of acute ICH is warranted, as its confirmation may lead to modifications in the current therapeutic approach.
authors.affiliation: Department of Neurology, Hospital Clínico, Valencia, Spain. med004201@saludalia.com
authors.forename: Ana M
authors.initials: AM
authors.lastname: Pascual
authors.forename: Jose V
authors.initials: JV
authors.lastname: López-Mut
authors.forename: Vicente
authors.initials: V
authors.lastname: Benlloch
authors.forename: Raquel
authors.initials: R
authors.lastname: Chamarro
authors.forename: Jose
authors.initials: J
authors.lastname: Soler
authors.forename: Miguel J A
authors.initials: MJ
authors.lastname: Láinez
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000098:blood supply / Q000473:pathology*; D002545:Brain Ischemia / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology; D002543:Cerebral Hemorrhage / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D005260:Female; D005500:Follow-Up Studies; D006406:Hematoma / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008137:Longitudinal Studies; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011446:Prospective Studies; D012720:Severity of Illness Index; D013997:Time Factors