Early arrival at the emergency department is associated with better collaterals, smaller established infarcts and better clinical outcomes with endovascular stroke therapy: SWIFT study

David S. Liebeskind, Reza Jahan, Raul G. Nogueira, Tudor G. Jovin, Helmi Lutsep, Jeffrey L. Saver

Research output: Contribution to journalArticle

29 Scopus citations


Background and purpose Increasing time from symptom onset to emergency department arrival may incur greater ischemic injury and decreased likelihood of good outcomes after acute stroke therapy. The impact of time may be assessed bythe extent of acute CT changes, status of collateral vessels, and clinical outcomes. Methods The SOLITAIRE FR With the Intention For Thrombectomy (SWIFT) trial comparing two neurothrombectomy treatments was analyzed by time, Alberta Stroke Program Early CT Scores (ASPECTS), angiographic collaterals, and 90-day modified Rankin Scale outcomes. We determined the interaction of time with ASPECTS, collateral grade, reperfusion, and clinical outcomes, with established determinants of angiographic and clinical outcomes as covariates. Results 137 patients (52% female) of mean age 67 ±12 years and median pretreatment NIH Stroke Scale score 18 (range 8-28) were enrolled. Median onset to door (OTD) time was 180 min (IQR 95-250). Presentation within 3 h of last known well was associated with absence of any prestroke disability and presence of atrial fibrillation but was unrelated to age, sex, other vascular risk factors, deficit severity, glucose level, or blood pressure. Worse collaterals were noted with longer OTD intervals: collateral grade 0-1 (n=32): mean 232±84 min; grade 2 (n=48): 164±99 min; grade 3 (n=35): 155±104 min; grade 4 (n=4): 54±16 min (p3 h vs 9 (IQR 8-10) 3 h as the only predictor of extensive infarct on imaging (ASPECTS ≤7), p=0.003. Earlier presentation was strongly associated with better 90-day modified Rankin Scale outcomes (p

Original languageEnglish (US)
Pages (from-to)553-558
Number of pages6
JournalJournal of NeuroInterventional Surgery
Issue number6
StatePublished - Jun 1 2016


ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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