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  • Title: Transient Ischemic Attacks Preceding Acute Lacunar Infarction.
    Author: Kim JG, Choi H, Sohn SY, Kim DH, Lee SJ.
    Journal: Eur Neurol; 2016; 76(5-6):278-283. PubMed ID: 27794566.
    Abstract:
    BACKGROUND: It has been reported that some patients with lacunar infarction have transient ischemic attacks (TIAs) before stroke. This study was aimed at evaluating the factors and prognostic value related to TIAs preceding acute lacunar stroke. METHODS: A total of 1,424 patients were admitted to the hospital for first-ever ischemic stroke. Of which 314 patients with acute lacunar infarction were enrolled for this study. The patients were divided into 2 groups based on the occurrence of TIAs before stroke. RESULTS: Fifty-eight patients (18.5%) had a history of preceding TIAs. The interval between TIA and stroke was less than 24 h in most patients (87.9%). Diabetes mellitus was more often found in patients with TIAs than in those without TIAs (48.3 vs. 28.9%, p = 0.004). Initial National Institute of Health Stroke Scale scores showed no significant difference between the 2 groups (median 2 vs. 3, p = 0.067). However, patients with preceding TIAs had a more favorable outcome (modified Rankin scale 0-1) than those without TIA at 3 months after stroke (79.6 vs. 63.2%, p = 0.021). CONCLUSION: Lacunar TIA may occur due to small perforating microatheromatous arteries caused by diabetes. This study suggests that ischemic tolerance may play a role in patients with preceding TIAs before lacunar infarct, allowing better recovery from a subsequent ischemic stroke.
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