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Research Article| Volume 404, P86-90, September 15, 2019

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Cognitive improvement after carotid artery stenting in patients with symptomatic internal carotid artery near-occlusion

      Highlights

      • Near-occlusion of internal carotid artery has influence on cognitive function.
      • Cognitive impairment was observed in these patients receiving medical treatment.
      • Cognitive improvement was observed in these patients receiving carotid stenting.

      Abstract

      Background and purpose

      To investigate the influence of carotid artery stenting (CAS) with embolic protection device (EPD) on the cognitive function of patients with near-occlusion of the cervical internal carotid artery (ICA).

      Methods

      From February 2014 to December 2017, a total of 79 symptomatic patients were recruited in this study. Of these patients, 31 patients refused to receive CAS therapy. They were divided into the CAS group (48 patients) and the medical treatment group (31 patients). Montreal cognitive assessment (MoCA) instrument was used for the evaluation of cognitive function. The analyzed endpoints included cumulative 12 month incidence of ipsilateral ischemic cerebrovascular events and MoCA scores at 1 month and 12 months after treatment.

      Results

      Cumulative 12 months incidence of ipsilateral ischemic cerebrovascular events was lower in patients who underwent CAS than in patients on medical treatment (P < 0.05). In CAS group, the total MoCA score, scores of attention and delayed recall at months 1 and 12 increased when compared with those at baseline (P < 0.05). In medical treatment group, the total MoCA score and attention score at month 12 decreased when compared with those at baseline (P < 0.05). In CAS group, the total MoCA score, scores of line connection test, drawing clock, attention and delayed recall were improved at 1 and 12 months when compared with medical treatment at the same time points (P < 0.05).

      Conclusions

      CAS with EPD not only decreases the risk of ipsilateral TIA and stroke but also may improve the cognitive function of symptomatic patients with ICA near-occlusion.

      Keywords

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