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목적 : To present clinical characteristics of retinal artery occlusion (RAO) after vascular procedure and investigate the possible mechanisms.
방법 : This study was retrospective observational case series and literature review for RAO after vascular procedure. Demographic and clinical characteristics were presented for our cases and previous studies. We combined data from our 10 cases and 18 cases of literature review, and analyze total 28 cases. Cases of RAO were categorized to 2 subgroups according to the assumed etiology; group 1: RAO resulted by emboli from dislodged plaque fragments, following procedural manipulation, group 2: RAO resulted by emboli from the newly formed thrombus or from the embolic material used, during the procedure.
결과 : For 28 cases, the frequency of the anatomical region for the vascular procedure was higher in the following order; carotid(46.4%), heart(25.0%), brain(10.7%), thyroid(7.1%), scalp/glabellar(7.1%), and lower extremity(3.6%). Seventeen cases were categorized as group 1 and 11 cases were categorized as group 2. All cases of group 1 were related with the dislodged plaque from carotid artery(64.7%) or heart(35.3%). All cases of group 2 were related with newly formed thrombus(54.5%) or migrated embolic material via collateral channels between external carotid and ophthalmic arteries(45.5%).
결론 : In conclusion, retinal artery occlusion can be resulted following vascular procedure. All of the cases related with dislodged plaque were carotid artery or heart origin. Newly formed thrombus or migrated embolic material via collateral channels was another possible mechanism for RAO. Therefore, for patients with vascular risk factor, especially with carotid or heart disease, risk of RAO should be considered and informed, and the procedure should be performed with more caution. Also, keeping procedural environment against thrombus formation and scrutinizing collateral channels are mandatory.
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