Scientific article

Perfusion imaging predicts favorable outcomes after basilar artery thrombectomy

Published inAnnals of neurology, vol. 91, no. 1, p. 23-32
Publication date2022-01
First online date2021-12-03

Objective: Perfusion imaging identifies anterior circulation stroke patients who respond favorably to endovascular thrombectomy (ET), but its role in basilar artery occlusion (BAO) is unknown. We hypothesized that BAO patients with limited regions of severe hypoperfusion (time to reach maximum concentration in seconds [Tmax] > 10) would have a favorable response to ET compared to patients with more extensive regions involved.

Methods: We performed a multicenter retrospective cohort study of BAO patients with perfusion imaging prior to ET. We prespecified a Critical Area Perfusion Score (CAPS; 0-6 points), which quantified severe hypoperfusion (Tmax > 10) in cerebellum (1 point/hemisphere), pons (2 points), and midbrain and/or thalamus (2 points). Patients were dichotomized into favorable (CAPS ≤ 3) and unfavorable (CAPS > 3) groups. The primary outcome was a favorable functional outcome 90 days after ET (modified Rankin Scale = 0-3).

Results: One hundred three patients were included. CAPS ≤ 3 patients (87%) had a lower median National Institutes of Health Stroke Scale score (NIHSS; 12.5, interquartile range [IQR] = 7-22) compared to CAPS > 3 patients (13%; 23, IQR = 19-36; p = 0.01). Reperfusion was achieved in 84% of all patients, with no difference between CAPS groups (p = 0.42). Sixty-four percent of reperfused CAPS ≤ 3 patients had a favorable outcome compared to 8% of nonreperfused CAPS ≤ 3 patients (odds ratio [OR] = 21.0, 95% confidence interval [CI] = 2.6-170; p < 0.001). No CAPS > 3 patients had a favorable outcome, regardless of reperfusion. In a multivariate regression analysis, CAPS ≤ 3 was a robust independent predictor of favorable outcome after adjustment for reperfusion, age, and pre-ET NIHSS (OR = 39.25, 95% CI = 1.34->999, p = 0.04).

Interpretation: BAO patients with limited regions of severe hypoperfusion had a favorable response to reperfusion following ET. However, patients with more extensive regions of hypoperfusion in critical brain regions did not benefit from endovascular reperfusion. ANN NEUROL 2022;91:23-32.

  • Adult
  • Aged
  • Cohort Studies
  • Endovascular Procedures / methods
  • Female
  • Humans
  • Magnetic Resonance Imaging / methods
  • Male
  • Middle Aged
  • Neuroimaging / methods
  • Perfusion Imaging / methods
  • Reperfusion / methods
  • Retrospective Studies
  • Thrombectomy
  • Tomography, X-Ray Computed / methods
  • Treatment Outcome
  • Vertebrobasilar Insufficiency / diagnostic imaging
  • Vertebrobasilar Insufficiency / pathology
  • Vertebrobasilar Insufficiency / surgery
Citation (ISO format)
CEREDA, Carlo W et al. Perfusion imaging predicts favorable outcomes after basilar artery thrombectomy. In: Annals of neurology, 2022, vol. 91, n° 1, p. 23–32. doi: 10.1002/ana.26272
Main files (1)
Article (Published version)
ISSN of the journal0364-5134

Technical informations

Creation08/05/2022 5:10:00 PM
First validation08/05/2022 5:10:00 PM
Update time03/16/2023 9:05:14 AM
Status update03/16/2023 9:05:13 AM
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