Plasma serotonin contents in cerebrovascular disease.

The plasma serotonin contents of fourty-three cerebrovascular patients were examined. 1. Abnormal serotonin contents were found in 72 per cent of fourty-three cerebrovascular patients. 2. In cerebral hemorrhage, serotonin contents were significantly low in the acute period. 3. Serotonin contents in cerebral hemorrhage and subarachnoid hemorrhage, had an increasing tendency from the fourth week to the eigth week, but after the eighth week, they returned to normal.