homovanillic acid ( hva ) , 5-hydroxyindoleacetic acid ( 5-hiaa ) and tryptophan ( trp ) were measured in the csf obtained from the basal cistern of 20 patients , who had undergone surgical obliteration of bleeding aneurysms within 3 days after subarachnoid haemorrhage ( sah ) .
C0019080
bleeding
C0038525
subarachnoid haemorrhage