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  • Title: Predisposing factors for acute deterioration of minor ischemic stroke.
    Author: Ogata T, Yasaka M, Wakugawa Y, Ibayashi S, Okada Y.
    Journal: J Neurol Sci; 2009 Dec 15; 287(1-2):147-50. PubMed ID: 19740487.
    Abstract:
    PURPOSE: Since attention should be paid to acute stroke patients who may easily worsen, we investigated the predisposing factors for acute deterioration of minor ischemic stroke in Japanese patients. METHODS: We retrospectively investigated 543 patients who were admitted within 7 days of the occurrence of an acute minor stroke with National Institute of Health Stroke Scale (NIHSS) score of 4 or less, between January 2002 and September 2005. Deterioration of neurological findings was defined as the worsening by 2 points or more of the NIHSS score during admission to the hospital. RESULTS: Out of 543 patients, deterioration was noted in 37 patients (6.8%: deterioration group), and not in the other 506 patients (93.2%: non-deterioration group). Multivariate analysis demonstrated that the factors associated with worsening were atherothrombotic brain infarction (deterioration group vs. non-deterioration group: 35.1% vs. 18.0%, P=0.049), elevated systolic blood pressure (170.5+/-32.4 mm Hg vs. 160.4+/-27.4 mm Hg, P=0.033), serum glucose level on admission (146.1+/-60.5mg/dL vs. 121.7+/-54.9 mg/dL, P=0.048), and presence of paralysis (73.0% vs. 54.9%, P=0.003) and vertigo (16.2% vs. 7.9%, P=0.034). The more factors there were that were associated with worsening (atherothrombotic infarction; systolic blood pressure >140 mm Hg; serum glucose level >140 mg/dL; and paralysis, vertigo, and dizziness), the more frequently the deterioration occurred (number of worsening factors 0-2: 4.6%, 3: 12.8%, 4: 32.3%). Although over 80% of patients in the group without deterioration had good functional outcome at discharge, over 90% of patients with deterioration either were discharged to nursing home care or died. CONCLUSION: In this study, the predisposing factors for acute deterioration in minor ischemic stroke were atherothrombotic brain infarction; high blood pressure; elevated serum glucose level; and paralysis, vertigo, and dizziness. Once patients with minor ischemic stroke deteriorated, their functional outcome at discharge was significantly worse than those who had not deteriorated.
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