Abstract
Purpose
Thrombosis is one of the main complications of endovascular treatment for unruptured intracranial aneurysms (UIA). This article reports the timing and initial location of thrombosis and prognosis after the use of tirofiban for performing coil embolization for UIA.
Methods
This study retrospectively collected 1686 cases of intracranial aneurysms treated with coil embolization from January 2013 to February 2018. Ruptured cases were excluded. The presumed causes and timing of thrombosis, the response after tirofiban administration and the modified Rankin scale (mRS) score at 3 months were reviewed.
Results
Of the 26 patients 76% were female and middle cerebral artery and basilar artery aneurysms accounted for 7 cases. The initial location of thrombosis was related to the stent (n = 14, 53.8%) or coil (n = 12, 46.2%). Of the patients 19 (73.1%) developed thrombosis during the procedure, and 5 patients (19.2%) developed it within 1 day of the procedure. Median duration between the thrombotic procedure and initial thrombosis was 38.5 min, 12 patients were symptomatic but more than half completely recovered after using tirofiban. Good clinical outcome (mRS 0–2) was seen in 92.3%. In the subgroup analysis, median time from the first thrombotic procedure to initial thrombosis within 1 day was 38.0 min (stent-related group) and 35.0 min (coil-related group, p = 0.651).
Conclusion
In most cases of embolization for UIA, thrombosis requiring the use of tirofiban occurs intraprocedurally or on the first day after the procedure. Careful observation of thrombosis during the procedure is important and tirofiban should be used for a better outcome even if the infarction progresses.
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D. Lee, D.H. Lee, J.C. Park, J.H. Shin, Y. Song, J. Chung, J.J. Sheen and D.C. Suh declare that they have no competing interests.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards. Individual patient consent was waived by Asan Medical Center institutional review board due to retrospective nature of study.
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Supplementary Figure 1. Flowchart of the patient selection process. Supplementary Figure 2. Distribution of the median time from the first thrombotic material insertion to the recognition of thrombosis in patients with thrombosis within a day and according to the initiating location of thrombosis within a day. Supplementary Table 1. Clinical characteristics and prognosis of patients with thrombosis according to the initiating location of thrombosis within a day of symptoms. Supplementary Table 2. Clinical characteristics and prognosis according to the initiating location of thrombosis regardless of the timing of thrombosis. Supplementary Table 3. Results of the patients who underwent both antiplatelet resistance tests (n=13).
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Lee, D., Lee, D.H., Park, J.C. et al. Timing of Thrombosis in Embolization of Unruptured Intracranial Aneurysms. Clin Neuroradiol 31, 125–133 (2021). https://doi.org/10.1007/s00062-019-00873-2
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DOI: https://doi.org/10.1007/s00062-019-00873-2