Min Soo Kim1, Kyung Il Jo2, Je Young Yeon3, Jong Soo Kim3, Keon Ha Kim4, Pyoung Jeon4, Seung Chyul Hong5. 1. Department of Neurosurgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea. 2. Department of Neurosurgery, Hana General Hospital, Cheongju, South Korea. 3. Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, South Korea. 4. Department of Radiology, Division of Interventional Neuroradiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea. 5. Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 135-710, South Korea. nsschong@skku.edu.
Abstract
INTRODUCTION: The purpose of this study was to explore the safety and efficacy of an antiplatelet response assay and drug adjustment to prevent delayed thromboembolic events after stent-assisted coil embolization. METHODS: A total of 370 patients were enrolled in this study between December 2005 and July 2014. Of these, 124 patients were placed into the drug resistance test (DRT) group with drug adjustment according to response to an antiplatelet agent, and 246 patients comprised the control group with a standard antiplatelet regimen. The response to the antiplatelet agent was evaluated with the VerifyNow Rapid Platelet Function Assay. Propensity score matching analysis was performed with one-to-multiple matching. RESULTS: Among 370 patients, delayed thromboembolic events occurred in 28 (7.6 %) patients including 25 (10.2 %) in the control group and three (2.4 %) in the DRT group. Antiplatelet response test (p = 0.012), diabetes mellitus (DM) (p = 0.014), and hypertension (HTN) (p < 0.001) were associated with delayed infarction in multivariate analysis. In propensity score matching analysis, 331 patients were matched (control group (n = 229) vs. DRT group (n = 103)), and antiplatelet response (hazard ratio 0.247, 95 % confidence interval 0.070-0.868, p = 0.029) was correlated with delayed infarction. Conversely, the two groups were not significantly different with regard to total (p = 0.368) or major hemorrhagic complications (p = 0.108). CONCLUSION: Antiplatelet drug adjustment according to the results of an antiplatelet response assay might be associated with a decreased risk of delayed thromboembolic infarction compared with the standard antiplatelet regimen.
INTRODUCTION: The purpose of this study was to explore the safety and efficacy of an antiplatelet response assay and drug adjustment to prevent delayed thromboembolic events after stent-assisted coil embolization. METHODS: A total of 370 patients were enrolled in this study between December 2005 and July 2014. Of these, 124 patients were placed into the drug resistance test (DRT) group with drug adjustment according to response to an antiplatelet agent, and 246 patients comprised the control group with a standard antiplatelet regimen. The response to the antiplatelet agent was evaluated with the VerifyNow Rapid Platelet Function Assay. Propensity score matching analysis was performed with one-to-multiple matching. RESULTS: Among 370 patients, delayed thromboembolic events occurred in 28 (7.6 %) patients including 25 (10.2 %) in the control group and three (2.4 %) in the DRT group. Antiplatelet response test (p = 0.012), diabetes mellitus (DM) (p = 0.014), and hypertension (HTN) (p < 0.001) were associated with delayed infarction in multivariate analysis. In propensity score matching analysis, 331 patients were matched (control group (n = 229) vs. DRT group (n = 103)), and antiplatelet response (hazard ratio 0.247, 95 % confidence interval 0.070-0.868, p = 0.029) was correlated with delayed infarction. Conversely, the two groups were not significantly different with regard to total (p = 0.368) or major hemorrhagic complications (p = 0.108). CONCLUSION: Antiplatelet drug adjustment according to the results of an antiplatelet response assay might be associated with a decreased risk of delayed thromboembolic infarction compared with the standard antiplatelet regimen.
Entities:
Keywords:
Aneurysm; Antiplatelet drug resistance; Interventional radiology; Stenting; Thromboembolism
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