on July 31, 2003
Published online before print July 31, 2003, doi: 10.1161/01.STR.0000085087.41330.FF
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Submitted on March 13, 2003
From the Departments of Neurology (T.A.B., M.W.P., K.S.B., S.M.D.), Radiology (P.M.D., B.M.T.), and Diabetes and Endocrinology (P.G.C.), Royal Melbourne Hospital; Department of Neurology (T.P., B.R.C.), Austin and Repatriation Medical Centre; and University of Melbourne (T.A.B., M.W.P., K.S.B., P.M.D., B.M.T., P.G.C., B.R.C., S.M.D.), Victoria, Australia. * To whom correspondence should be addressed. E-mail: stephen.davis{at}mh.org.au.
Background and Purpose--Hyperglycemia at the time of ischemic stroke is associated with increased mortality and morbidity. Animal studies suggest that infarct expansion may be responsible. The influence of persisting hyperglycemia after stroke has not previously been examined. We measured the blood glucose profile after acute ischemic stroke and correlated it with infarct volume changes using T2- and diffusion-weighted MRI. Methods--We recruited 25 subjects within 24 hours of ischemic stroke symptoms. Continuous glucose monitoring was performed with a glucose monitoring device (CGMS), and 4-hour capillary glucose levels (BGL) were measured for 72 hours after admission. MRI and clinical assessments were performed at acute (median, 15 hours), subacute (median, 5 days), and outcome (median, 85 days) time points. Results--Mean CGMS glucose and mean BGL glucose correlated with infarct volume change between acute and subacute diffusion-weighted MRI (r Conclusions--Persistent hyperglycemia on serial glucose monitoring is an independent determinant of infarct expansion and is associated with worse functional outcome. There is an urgent need to study normalization of blood glucose after stroke.
Accepted on April 14, 2003
Persistent Poststroke Hyperglycemia Is Independently Associated With Infarct Expansion and Worse Clinical Outcome
Tracey A. Baird MRCP;
0.60, P<0.01), acute and outcome MRI (r=0.56, P=0.01), outcome National Institutes of Health Stroke Scale (NIHSS; r0.53, P<0.02), and outcome modified Rankin Scale (mRS; r0.53, P=0.02). Acute and final infarct volume change and outcome NIHSS and mRS were significantly higher in patients with mean CGMS or mean BGL glucose 7 mmol/L. Multiple regression analysis indicated that both mean CGMS and BGL glucose levels 7 mmol/L were independently associated with increased final infarct volume change.
Key words: brain ischemia • glucose • hyperglycemia • magnetic resonance imaging, diffusion-weighted • prospective studies
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