Delayed coronary artery occlusion (CAO) is a rare but fatal complication after transcatheter aortic valve replacement, chimney stenting is the standard technique for established CAO or impending CAO. We describe a female patient who developed non-ST elevation myocardial infarction after receiving transcatheter aortic valve replacement and chimney stenting 4 months prior. An angiogram revealed delayed coronary artery occlusion with a deformed stent, which was never reported. This patient was subsequently treated with a new chimney stent. For self-expanding valves, the coronary ostium is protected by chimney stenting, delayed coronary artery occlusion can occur and cause catastrophic complications.

中文翻译：

---

经导管主动脉瓣置换和烟囱支架置入后延迟冠状动脉闭塞：病例报告

延迟冠状动脉闭塞 (CAO) 是经导管主动脉瓣置换术后罕见但致命的并发症，烟囱支架置入术是确定 CAO 或即将发生 CAO 的标准技术。我们描述了一名女性患者，她在 4 个月前接受了经导管主动脉瓣置换术和烟囱支架植入后出现了非 ST 段抬高心肌梗死。血管造影显示延迟冠状动脉闭塞和支架变形，这从未被报道过。该患者随后接受了新的烟囱支架治疗。对于自扩张瓣膜，冠状动脉口受到烟囱支架的保护，可能会发生延迟的冠状动脉闭塞并导致灾难性的并发症。