Thrombectomy is now the standard of care of revascularization in acute ischaemic stroke. Data tend to show that final neurologic outcome is superior if the thrombectomy procedure was performed under conscious sedation.

The Rothschild Foundation is a high output centre with more than 400 thrombectomy procedures every year.

We report a rate of 5% of these procedures requiring general anesthesia despite conscious sedation being the standard of care. This study aims to identify clinical factors associated with a risk of conversion of a conscious sedation to a general anesthesia.

Inclusion Criteria:

• patients undergoing thrombectomy for ischemic stroke
• age ≥ 18 years old

Exclusion Criteria:

• patient already under general anesthesia
• general sedation required
• haemorrhagic softening diagnosed before the beginning of procedure
• patient refusal to participate in the study

Endovascular Acute Stroke Therapy scheduled to be performed with local sedation and either performed under General Anesthesia (case), either actually performed under conscious sedation (control).

Endovascular Acute Stroke Therapy scheduled to be performed with conscious sedation and performed under General Anesthesia 3 control patients will be included per case, and matched with the moment of procedure (term of the year).