Imagery of Retinal and Choroidal Variations Observed After a Revascularization Procedure on the Internal Carotid Artery
Imagery of Retinal and Choroidal Variations Observed After a Revascularization Procedure on the Internal Carotid Artery
The purpose of this study is to describe the changes in morphology and Retinal
 vascularization after revascularization of the internal carotid artery. Indeed, the stenosis
 of the internal carotid artery can lead to ophthalmological charts. The underlying hypothesis
 is that revascularization of the internal carotid artery would improve ipsilateral and
 retinal homolateral perfusion in the short term. The OCT-angiography technique accurately
 studies the retinal vasculature and also assesses the risk of retinal and choroidal embolism,
 which is recognized as increased in cases of symptomatic or asymptomatic carotid stenosis.
The stenosis of the internal carotid artery is a frequent and potentially serious pathology
 (TIA, ischemic stroke, death), which can also be manifested by ophthalmological charts,
 foremost among which are transient monocular blindness.

 The most common etiology of this stenosis remains the atheromatous pathology, whose
 treatment, depending on the symptomatic or non-symptomatic nature of the stenosis, includes,
 among other things, a revascularization procedure that may be surgical (endarterectomy,
 reference treatment) or guided by radiology (angioplasty and carotid stent placement)

 From the anatomical point of view, the internal carotid artery notably has for branching the
 ophthalmological artery, which itself will give birth:

 -  at the central artery of the retina: role in the vascularization of the inner layers of
 the retina

 -  posterior ciliary arteries: role in the choroidal vasculature and outer layers of the
 retina.

 Very little knowledge at the present time relates changes in retinal and choroidal
 vascularization after a revascularization procedure on the internal carotid artery
 OCT-angiography is a non-invasive imaging technique that is now part of investigative
 examinations in retinal imaging. This technique makes it possible to study the macular and
 choroidal retinal vascularization with precision without injection of contrast medium and
 thus allows to deepen the knowledge in medical fields where the exploration was until now
 limited because of the invasiveness of the examinations.

 The hypothesis of this project is that revascularization of the internal carotid artery would
 improve retinal and choroidal ipsilateral perfusion in the short term (1 month
 postoperatively), as assessed by OCT-angiography. OCT-angiography could also be used to
 assess retinal and choroidal embolism risk, usually recognized as increased in cases of
 symptomatic or asymptomatic carotid stenosis.
Inclusion Criteria

 -  Patient aged 18 or over

 -  Indication of treatment with a carotid revascularization procedure (conventional
 surgery or angioplasty and stent)

 -  Acceptance to participate in the protocol

 Exclusion Criteria:

 -  Associated retinal ophthalmological pathology: diabetic retinopathy, age-related
 macular degeneration, retinal vein occlusion, CRSC (Central serous chorioretinopathy)

 -  Refusal to participate in the study

 -  Not affiliated to a social security scheme