Objective Endovascular management of basilar artery occlusion (BAO) has gained acceptance during the past decades. However, only scant data are available on the clinical and radiological factors that may predict the neurological outcome after endovascular management. Our study aimed i) to compare existing radiological prognostic scores with a new composite score developed by our unit, and ii) to identify clinical and radiological prognostic factors predicting the 3 months’ clinical outcome.

Methods We retrospectively analyzed the charts of 29 consecutive patients (21 males; mean age ± SD = 61.1 years ± 14.1) who presented BAO and underwent endovascular treatment between 2006 and 2013 in our institution. Clinical data (including NIHSS), radiological data (including 5 existing prognostic scores and our new score [BAOBAB]), angiographic data (including drugs/devices used, TICI recanalization score) were recorded. Patients were divided into two groups: favorable-outcome (modified Rankin Scale [mRS] = 0–3) and poor-outcome (mRS = 4–6) at 3 months follow-up.

Results Sixteen out of 29 patients (55%) had a favorable outcome whereas 13/29 (45%) had a poor one, including 8/29 deceased patients (27.6%). Patients with 3 months’ favorable outcome had statistically a lower NIHSS at day 1 and day 7 (p = 0.0008), and better prognostic scores on initial MRI (p < 0.05 for each score). The BAOBAB was the most accurate score to predict a favorable clinical outcome at 3 months’ follow-up.

Conclusion Our new score is accurate to predict a favorable clinical outcome at 3 months follow-up, especially with no false positive cases.

Disclosures R. Fahed: None. N. Sourour: 2; C; eV3/Covidien. C. Rosso: None. F. Di Maria: None. S. Crozier: None. J. Gabrieli: None. J. Chiras: None. F. Clarençon: None.