Effect of Interhospital Transfer on Endovascular Treatment for Acute Ischemic Stroke

Esmee Venema*, Adrien E. Groot, Hester F. Lingsma, Wouter Hinsenveld, Kilian M. Treurniet, Vicky Chalos, Sanne M. Zinkstok, Maxim J. H. L. Mulder, Inger R. de Ridder, Henk A. Marquering, Wouter J. Schonewille, Marieke J. H. Wermer, Charles B. L. M. Majoie, Yvo B. W. E. M. Roos, Diederik W. J. Dippel, Jonathan M. Coutinho, Bob Roozenbeek, MR CLEAN Registry Investigators

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Background and Purpose-To assess the effect of inter-hospital transfer on time to treatment and functional outcome after endovascular treatment (EVT) for acute ischemic stroke, we compared patients transferred from a primary stroke center to patients directly admitted to an intervention center in a large nationwide registry.

Methods-MR CLEAN (Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands) Registry is an ongoing, prospective, observational study in all centers that perform EVT in the Netherlands. We included adult patients with an acute anterior circulation stroke who received EVT between March 2014 to June 2016. Primary outcome was time from arrival at the first hospital to arterial groin puncture. Secondary outcomes included the 90-day modified Rankin Scale score and functional independence (modified Rankin Scale score of 0-2).

Results-In total 821/1526 patients, (54%) were transferred from a primary stroke center. Transferred patients less often had prestroke disability (227/800 [28%] versus 255/699 [36%]; P=0.02) and more often received intravenous thrombolytics (659/819 [81%] versus 511/704 [73%]; P

Conclusions-Interhospital transfer of patients with acute ischemic stroke is associated with delay of EVT and worse outcomes in routine clinical practice, even in a country where between-center distances are short. Direct transportation of patients potentially eligible for EVT to an intervention center may improve functional outcome.

Original languageEnglish
Pages (from-to)923-930
Number of pages8
Issue number4
Publication statusPublished - Apr 2019


  • patient transfer
  • registries
  • stroke
  • thrombectomy
  • time to treatment
  • TIME


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