[Circulating platelet aggregates in patients with acute ischemic and so-called chronic cerebrovascular disorders].

A modified platelet function test was assessed as a routine method in 71 normal subjects and 96 patients. In patients with cerebral infarction (33) and those with transitory ischaemic attacks (30) definite changes in platelet function were demonstrated. In patients with cerebrovascular insufficiency (33) there was significantly increased platelet aggregation, but in only 46% of these patients were the values over 3 standard deviations above the mean of the control group (71).