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To evaluate impact of glucose burden on diffusion-weighted imaging (DWI)-lesion evolution according to ischemia duration in stroke. We studied 47 patients with transcranial Doppler (TCD)-documented artery occlusion treated with intravenous tissue plasminogen activator. Hyperglycemia (HG) was defined as glucose &gt; 140 mg/dL. A subcutaneous device continuously monitored glucose during 24 h. Magnetic resonance imaging was performed pretreatment (1) and at 24 to 36 h (2) in 30 patients. We measured initial PWI lesion (PW1) and DWI growth: DW2–DW1 (DWg). Serial TCD during 24 h determined occlusion time (OT). National Institutes of Health Stroke Scale (NIHSS) scores were obtained at baseline and 48 h. Poor short-term clinical course defined as   14 cm 3  best predictor of poor outcome (sensitivity, 85.7%; specificity, 75%). Total OT ( P = 0.007) and HG during OT ( P = 0.01) showed the strongest correlation with DWg. DWI lesion grew 2.7 times faster in patients with HG than without HG during OT (1.73 versus 4.63 cm 3 /h of occlusion; P = 0.07). In a regression model the only independent predictor of DWg was HG during OT (OR: 10.83; 95% CI: 1.96 to 59.83; P = 0.006). Hyperglycemia, especially during OT, has a powerful deleterious effect after stroke accelerating brain damage.

Hyperglycemia during Ischemia Rapidly Accelerates Brain Damage in Stroke Patients Treated with tPA