Impact of the Penumbral Pattern on Clinical Outcome in Patients with Successful Endovascular Revascularization

Jong Won Chung, Jun Yup Kim, Hong Kyun Park, Beom Joon Kim, Moon Ku Han, Jun Lee, Kang Ho Choi, Joon Tae Kim, Cheolkyu Jung, Jae Hyoung Kim, O. Ki Kwon, Chang Wan Oh, Juneyoung Lee, Hee Joon Bae

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Background In patients with acute ischemic stroke, the impact of penumbral patterns on clinical outcomes after endovascular treatment (EVT) remains controversial. We aimed to establish whether penumbral patterns are associated with clinical outcome after successful recanalization with EVT while adjusting for onset to revascularization time. Materials and Methods Using a web-based, multicenter, prospective stroke registry database, we identified patients with acute ischemic stroke who underwent perfusion and diffusion magnetic resonance imaging (MRI) before EVT, had anterior circulation stroke, received EVT within 12 hours of symptom onset, and had successful revascularization confirmed during EVT. Based on pretreatment MRI, patients were stratified as having a favorable or nonfavorable penumbral pattern. Onset to revascularization time was dichotomized by median value. Primary outcome was functional independence (modified Rankin Scale score ≤2) at 90 days. Findings Among 121 eligible patients from three university hospitals, 104 (86.0%) had a favorable penumbral pattern, and the median time to revascularization was 271 minutes (interquartile range, 196-371). The functionally independent patient proportion was higher in those with a favorable penumbral pattern than in those without (53.8% versus 5.9%; P < .001), but was not different between early and late revascularization groups (49.2% versus 45.0%; P = .65). The favorable penumbral pattern was associated with functional independence after adjusting confounders (odds ratio, 23.25; 95% confidence interval: 1.58-341.99; P = .02). Time to revascularization did not modify the association (P for interaction, .53). Conclusion A favorable penumbral pattern is associated with improved functional independence in patients with endovascular revascularization, and the association was not time-dependent.

Original languageEnglish
Pages (from-to)360-367
Number of pages8
JournalJournal of Stroke and Cerebrovascular Diseases
Issue number2
Publication statusPublished - 2017 Feb 1
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 National Stroke Association


  • Stroke
  • endovascular treatment
  • penumbra
  • revascularization
  • time

ASJC Scopus subject areas

  • Surgery
  • Rehabilitation
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine


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