Nonemergent EIB for LAA Retrospective Review

The medical data of patients who underwent nonemergent EIB for LAA between January 2006 and January 2020 were retrospectively reviewed under the approval of the Seoul National University Bundang Hospital institutional review board (IRB number: B-2103/673-103). The requirement to obtain informed consent from the patients has been waived by the Seoul National University Bundang Hospital institutional review board, and all methods were performed in accordance with the relevant guidelines and regulations. During the research period, we performed a total of 1,091 EIB procedures. A total of 738 patients who underwent EIB due to moyamoya disease or intracranial aneurysm or who underwent urgent or emergent bypass for AIS in the acute period or for acute ischemic symptoms such as transient ischemic attack (TIA) with an onset within 4 weeks were excluded. Among the remaining 272 patients, 186 whose perfusion data could not be reconstructed with RAPID software or who did not undergo pre- and immediate postoperative CTP scans were additionally excluded. Finally, 86 patients were analyzed in this study (Fig. 1).Figure 1

Flow diagram of the enrolled patients.