alexa MRI findings and stroke risk in TIA patients with different symptom durations.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): AlKhaled M, Eggers J

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Abstract OBJECTIVE: To determine the frequency of acute infarction detected by diffusion-weighted imaging (DWI)-MRI and stroke risk in TIA patients with different symptom duration in a population-based study. METHODS: During a 54-month period (starting November 2007), 3,724 admitted patients (mean age, 67 ± 14 years; 45\% women) with transient neurologic symptoms lasting <24 hours from 15 hospitals were included. All patients underwent DWI-MRI during hospitalization. RESULTS: Of 3,724 patients, 1,166 showed an acute infarction (32.2\%; 95\% confidence interval [CI], 30.8\%-33.8\%) and 88 (2.4\%; 95\% CI, 1.9\%-2.9\%) had a stroke during hospitalization (7 days). Stroke risk was higher in patients with tissue-positive DWI than in those with tissue-negative DWI (4.5\% vs. 1.5\%, respectively; p < 0.001). Logistic regression analysis revealed that stroke risk was correlated with positive DWI (odds ratio [OR], 3.1; 95\% CI, 2.0-4.8; p < 0.001), atrial fibrillation (OR, 2.1; 95\% CI, 1.3-3.5; p = 0.001), and symptom duration <1 hour (OR, 1.5; 95\% CI, 1.0-2.4; p = 0.042). Patients with symptoms lasting <1 hour had a lower rate of acute infarction than those with symptoms lasting ≥1 hour (24\% vs. 36\%, respectively; p < 0.001), whereas stroke risk did not differ between the groups (2.8\% vs. 2.1\%, respectively; p = 0.22). Stroke risk was higher after tissue-positive events than tissue-negative ones in patients with symptom duration <1 hour (5.2\% vs 2.0\%, respectively; p = 0.002) and in those with symptom duration ≥1 hour (4.1\% vs. 1.1\%, respectively; p < 0.001). CONCLUSION: Stroke risk was higher after tissue-positive events than tissue-negative ones in TIA patients with different symptom duration. This article was published in Neurology and referenced in Journal of Addiction Research & Therapy

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