Interest of the T2 * Sequence in MRI for the Diagnosis of Migraine Aura in the Acute Phase.
Interest of the T2 * Sequence in MRI for the Diagnosis of Migraine Aura in the Acute Phase.
investigators hypothesize that T2 * vein abnormalities are frequent and are specific to the
 migraine aura.
The diagnosis of migraine aura is now based solely on clinical criteria and the assertion of
 the diagnosis on these clinical criteria alone proves difficult in the acute phase. Added to
 this difficulty, the symptomatology of a migraine aura can sometimes be similar to that of a
 stroke, so a diagnosis can be poorly established, resulting in poor patient care. The
 possibility of making the positive diagnosis of migraine aura on a routine MRI sequence, T2
 *, would be an important advance for the management of these patients
Inclusion Criteria:

 -  Patients aged 18 to 55 years

 -  Admitted to the Neuro-Vascular Intensive Care Unit for Acute Focused Neurological
 Symptoms and MRI

 -  less than 4 hours 30 minutes after onset of symptoms if symptoms persist during
 admission

 -  less than two hours after the disappearance of symptoms if the patient arrives
 asymptomatic

 -  Affiliated to a social protection scheme.

 -  Having given their informed consent

 Exclusion Criteria:

 -  Patients with neurological signs pointing to vertebrobasilar localization (vertigo,
 diplopia) or with a disorder of consciousness

 -  Presence of recent explanatory abnormalities on the MRI to make a diagnosis compatible
 with the initial neurological symptomatology (visible stroke in diffusion, cerebral
 hemorrhage, tumor, arteriovenous malformations).

 -  Potential strong cause of stroke known or discovered at the arrival of the patient, in
 particular stenosis of a cervical or intracranial artery upstream of the cerebral zone
 may correspond to the symptoms and emboligenic heart disease type atrial fibrillation.

 -  Pregnant women - Patients with a contraindication for MRI.

 -  Patients benefiting from a system of legal protection (tutelage,