A case of symptomatic carotid artery occlusion after aortic arch replacement treated with carotid-carotid crossover bypass

Yusuke Sakamoto, Kenko Maeda, Masaya Takemoto, Jungsu Choo, Mizuka Ikezawa, Ohju Fujita, Fumihiro Sago, Daiki Somiya, Akira Ikeda
Surgical Neurology International 2022, 13: 273
35855150

Background: Symptomatic common carotid artery (CCA) occlusion is rare and its treatment remains unestablished. Although cases of subclavian-to-carotid bypass have been reported, very few cases of carotid-tocarotid crossover bypass have been reported, despite its advantages. We report a case of Riles type 1A symptomatic CCA occlusion after aortic arch replacement that was treated with carotid-to-carotid crossover bypass with favorable outcomes.

Case Description: A 65-year-old woman with a history of hypertension, hyperlipidemia, diabetes, and total arch replacement for thoracic aortic aneurysm was admitted to our hospital with a complaint of the right hemiparesis and motor aphasia. Head magnetic resonance imaging revealed a fresh infarction in the left cerebral hemisphere. Cervical computed tomography (CT) angiography revealed left CCA occlusion. Thoracic CT angiography showed severe stenosis of the left subclavian artery. SPECT showed a general decrease in blood flow in the left cerebral hemisphere. We performed a carotid-to-carotid crossover bypass with a synthetic graft that was passed through the subcutaneous tunnel. First, the right carotid artery-synthetic graft end-to-side anastomosis was performed. Subsequently, we performed synthetic graft-left CCA end-to-side anastomosis. The postoperative course was uneventful. Cervical computed tomography angiography showed perfect patency of the crossover bypass. The patient recovered almost completely and was independently performing daily activities.

Conclusion: Carotid-to-carotid crossover bypass is a durable treatment for symptomatic CCA occlusion. Further studies are needed to compare its outcomes with those of other methods and to confirm our findings with larger sample size.

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