Abstract

Background: Hyperglycemia is recognized as a common occurrence associated with a high risk of poor outcome in ischemic stroke patients. However, little is known about the association between elevated glucose level, growth of infarct volume, and neurological deterioration in ischemic stroke patients without diabetes. The present study aimed to clarify this issue in acute ischemic stroke patients with arterial occlusion. Methods: We studied 375 acute ischemic stroke patients with arterial occlusion within 24 h of onset. Diabetes was diagnosed in patients with known history of diabetes or HbA1c value ≥6.5%. Infarct volume was measured on admission and at follow-up within 48 h using diffusion-weighted imaging. Neurological deterioration was defined as an increase of ≥4 points increase in National Institutes of Health Stroke Scale score within seven days of stroke onset. We examined the relationship between glucose level on admission, infarct volume growth, and neurological deterioration in three categories (all patients, non-diabetes, and diabetes) using multivariate modeling. Regression models included admission glucose level and other potentially predictive variables (NIHSS score on admission, initial infarct volume, arterial recanalization, hemorrhagic infarction, and ICA occlusion). Results: Diabetes was present in 104 patients (27.7%). Multivariate regression analysis showed that elevated glucose level was independently associated with infarct volume growth in all patients (P=0.034) and non-diabetes (P=0.002), but not in diabetes (P=0.871). Moreover, elevated glucose level was independently associated with neurological deterioration in all patients (odds ratio [OR], 1.010; 95% confidence interval [CI], 1.004-1.017; P=0.002) and non-diabetes (OR, 1.014; 95%CI, 1.002-1.026; P=0.022), but not diabetes (OR, 1.006; 95%CI, 0.998-1.014; P=0.151). Conclusions: Glucose level appears to influence infarct volume growth and neurological deterioration, particularly in non-diabetic patients with ischemic stroke.

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