Aorto-carotid bypass for type A acute aortic dissection complicated with carotid artery occlusion: no touch until circulatory arrest

Hideki Sasaki, Takashi Harada, Hiroshi Ishitoya, Osamu Sasaki
Interactive Cardiovascular and Thoracic Surgery 2020 June 30
The surgical management for type A acute aortic dissection complicated with carotid artery occlusion remains controversial. Between December 2012 and June 2017, 127 patients who presented with type A acute aortic dissection were operated on in our hospital. Of this group, nine (7.08%) patients had cerebral malperfusion due to carotid artery occlusion. The site of occlusion was innominate artery (n = 5) or right carotid artery (n = 4). Preoperative neurological symptoms were left hemiplegia (n = 1), left hemiparesis (n = 3) and seizure (n = 2). Preoperative consciousness level was Japan Coma Scale 2 (n = 6), 20 (n = 2), or 200 (n = 1). The procedure consisted of hemiarch replacement (n = 4) or total arch replacement (n = 5). Aorto-carotid bypass was performed in all patients under hypothermic circulatory arrest. The time from onset of symptoms to operating room was 7.2 ± 2.4 h. Hospital mortality was 0%. Left hemiplegia and left hemiparesis improved significantly. Japan Coma Scale was 0 in all patients at discharge. Overall survival at 24 months after operation was 100%. Aorto-carotid artery bypass for type A acute aortic dissection with carotid artery occlusion is the treatment of choice in these high-risk patients. Our strategy of 'no touch until circulatory arrest' may contribute to neurological improvement.

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