Impact of the collateral network on central-repair-first strategy in superior mesenteric artery occlusion with type A ac
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ORIGINAL ARTICLE
Impact of the collateral network on central‑repair‑first strategy in superior mesenteric artery occlusion with type A acute aortic dissection Shigeki Koizumi1 · Hideki Tsubota1 · Tadaaki Koyama1 Received: 15 August 2020 / Accepted: 12 October 2020 © The Japanese Association for Thoracic Surgery 2020
Abstract Objectives Surgery for acute type A aortic dissection with mesenteric malperfusion is challenging. Although the peripheralreperfusion-first strategy has shown good results, more discussion regarding indicated patients is needed. This study aimed to describe the imaging features and surgical outcomes of mesenteric malperfusion and to clarify which cases should be considered for the peripheral-reperfusion-first strategy. Methods A total of 200 patients underwent emergent aortic repair for acute type A aortic dissection at our institution between October 2011 and July 2019. Superior mesenteric artery occlusion on preoperative contrast-enhanced computed tomography was detected in 12 patients, who were categorized into two groups based on enhancement (n = 7) or non-enhancement (n = 5) of the superior mesenteric artery peripheral branches. Operative outcomes after central repair were compared between groups. Results Four patients in the enhanced group had no postoperative abdominal complications, and three patients required superior mesenteric artery bypass grafting with the central-repair-first strategy. However, all patients in the enhanced group survived and did not require intestinal resection. In contrast, four patients (80%) in the non-enhanced group had intestinal necrosis, three patients required intestinal resection, and one patient died from multiple organ failure. Conclusion The presence or absence of an enhancement of the peripheral superior mesenteric artery by the collateral network could be helpful for decision-making. The central-repair-first strategy may be permitted in patients with enhanced peripheral branches. Conversely, in patients with non-enhanced peripheral branches, a more invasive assessment should be considered before central aortic repair, and peripheral-reperfusion-first strategy may be required. Keywords Aortic dissection · Mesenteric malperfusion · Superior mesenteric artery occlusion · Central repair
Introduction Surgical outcomes for acute type A aortic dissection (ATAAD) have recently improved; however, surgery for ATAAD with malperfusion is challenging, and especially, mesenteric malperfusion remains an unsolved issue. Previous large registries have shown a high in-hospital mortality rate (> 60%) with mesenteric malperfusion, and mesenteric malperfusion is a significant risk factor for early mortality after surgery [1–3]. Moreover, even if patients survive, a * Shigeki Koizumi [email protected] 1
Department of Cardiovascular Surgery, Kobe City Medical Center General Hospital, 2‑1‑1 Minatojima Minamimachi Chuoku Kobeshi Hyogoken, Kobe 650‑0047, Japan
massive intestinal resection can deteriorate their postoperative quality of life. Immediate central r
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