A higher prevalence of stroke is found in the patient with both diagno
sed and undiagnosed diabetes and glucose intolerance. Because of local
cerebral acidosis caused by ischemia and hyperglycemia, morbidity and
mortality from a stroke are increased. Most studies show that individ
uals with admission serum glucose >120 mg/dl (6.7 mM) have a higher mo
rbidity and mortality from a stroke. The prevalence of cerebral infarc
ts, especially lacunar infarcts, is increased and the prevalence of su
barachnoid hemorrhage, cerebral hemorrhage, and transient ischemic att
acks are decreased in the diabetic patient. Age, race, hypertension, a
nd the presence of diabetic nephropathy and coronary and peripheral va
scular disease are risk factors for stroke in the diabetic patient, wh
ereas obesity, smoking, hyperlipidemia, and glycemic control are not.
Investigation and treatment of the diabetic patient with a stroke is d
iscussed.