Abstract
非瓣膜性心房颤动（房颤）所致的脑栓塞是缺血性卒中最为常见的类型之一，且短期内栓塞复发风险较高，病情容易进展，尤其是抗凝药物应用不当时。复发性栓塞多以脑栓塞为主，肠系膜上动脉栓塞（superior mesenteric artery embolism， SMAE）少见。SMAE是严重的急腹症，病情凶险，当其进展为严重的缺血坏死性肠病并发罕见的肝门静脉积气（hepatic portal vein gas， HPVG）时往往预后极差，病死率很高。以往SMAE的影像诊断主要依靠腹部增强CT显示肠系膜上动脉充盈缺损来诊断，但对于碘对比剂禁忌者，非对比增强CT上出现的肠系膜上动脉内的“动脉致密征”也是一个有重要价值的诊断征象，以往罕见报道。现本文结合文献，报道1例经非对比剂增强腹部CT确诊的非瓣膜性房颤性卒中患者短期内并发急性SMAE并继发HPVG的罕见致死性案例。.
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