Please select the eligibility criteria that correspond to the clinical trial below.
Title: Anaesthetic Strategy During Endovascular Therapy: General Anaesthesia or Conscious Sedation ?
Brief Summary: Patients suffering a stroke with a large vessel occlusion is often treated intra veneous thrombolyse and on top of that also intra arterial therapy. It is unknown what form of anaestesia is best during intra arterial therapy. The investigators will randomize these patients between general anaestesia and local anaestesia. Outcome will be growth of the ischemic lesion as judged on an MRI scan.


Options:
A: Inclusion Criteria:

* Patients with AIS scheduled to receive emergency endovascular treatment, older than 18; the onset time is within 12 hours.

Exclusion Criteria:

* Radiological ambiguity concerning infarction and vessel occlusion.
* Additional intracerebral hemorrhage.
* Posterior circulation infraction.
* Coma on admission (Glasgow coma score less than 8).
* NIHSS less than 10 or more than 35.
* Severe agitation or seizures on admission.
* Obvious loss of airway protective reflexes and/or vomiting on admission.
* Being intubated before treatment on admission.
* Known allergy to anesthetic or analgesic.
B: Inclusion Criteria:

* Age \> 18 years
* Body mass index \< or equal to 35 kg/m² ,
* Indication for thrombectomy, after multidisciplinary consultation,
* Proximal artery occlusion in the anterior circulation (internal carotid artery, M1, M2,...), confirmed on imaging (angioscan or angio-MRI),
* Written informed consent of the patient or a close / trusted person when possible, or emergency procedure,
* Patient affiliated to or beneficiary of an health insurance

Non-inclusion Criteria:

* Comorbidity committing short-term prognosis,
* Hemodynamic instability,
* Pregnant woman,
* Contra-indication to sedation: pre-existing swallowing impairment; restless patient, not able to stay lying down; Glasgow score \< 8,
* Contra-indication to general anesthesia,
* Intubated patient at inclusion,
* Additional intracerebral hemorrhage,
* Sign of occlusion in a different cerebral territory,
* Known contra-indication to succinylcholine: hypersensitivity, hyperkaliemia,
* Known contra-indication to one of the anesthesic agents,
* Patient participating in another clinical trial, possibly interfering with the study procedures,
* Patient in a known situation of deprivation of freedom, guardianship or curatorship.

Exclusion criteria:

* Patients with deprivation of freedom will be excluded as soon as the investigator will have knowledge of the situation.
C: Inclusion Criteria:

* Patients with acute ischemic stroke in posterior cerebral circulation scheduled to receive emergency endovascular treatment; Age \> 18; The onset time is within 24 hours; Modified rankin score ≤2 before onset.

Exclusion Criteria:

* Radiological ambiguity concerning infarction and vessel occlusion; Additional intracerebral hemorrhage; Anterior circulation infraction; Coma on admission (Glasgow coma score less than 8); NIHSS less than 6 or more than 30; Severe agitation or seizures on admission; Obvious loss of airway protective reflexes and/or vomiting on admission; Being intubated before treatment on admission; Known allergy to anesthetic or analgesic;
D: Inclusion Criteria:

* NIHSS\>10
* mRS=\<2
* groin puncture\<6hours from stroke onset
* occlusion of ICA, ICA-T, M1, M2

Exclusion Criteria:

* MRI contraindications
* GCS\<9
* intubated prior to arrival
* posterior circulation stroke
* allergy to anestetics

Answer: D