title: [Subarachnoid hemorrhage without aneurysm on the angiogram: the value of repeat angiography].
abstract: OBJECTIVE
  To determine the yield of repeated angiography in patients with a non-perimesencephalic subarachnoid haemorrhage (SAH) and a negative first cerebral angiogram.
  
  
  METHODS
  Retrospective.
  
  
  METHODS
  All diagnostic data of patients with a spontaneous SAH admitted to the Department of Neurology, St. Elisabeth Hospital, Tilburg, the Netherlands, in the period 1 January 1992-30 June 2000 were analysed. Patients with a perimesencephalic haemorrhage on a CT-scan were excluded and follow-up was completed. A negative angiogram was considered false-negative, if an aneurysm was shown on a repeat angiogram or after a rebleed. These angiograms were reviewed.
  
  
  RESULTS
  A total of 333 patients with a spontaneous SAH were registered. Of these, 249 patients had one or more angiograms made, which resulted in 59 first angiograms being negative (24%). A total of 36 patients had a non-perimesencephalic SAH (26 women and 10 men; mean age: 54 years (range: 25-77)). In 25 of these 36 patients, angiography was repeated revealing 9 aneurysms. Four patients suffered from a rebleed after a previous negative angiogram. Altogether, in 13 of these 36 patients the first negative angiogram was false-negative (36%). In 5 of the 9 patients with a positive repeat angiogram, the first angiogram had been incorrectly assessed as negative.
  
  
  CONCLUSIONS
  Of the 36 patients with a non-perimesencephalic subarachnoid haemorrhage and a negative angiogram, 13 were revealed to have an aneurysm. Nine of these 13 aneurysms were demonstrated on a repeat angiogram. Technical and interpretation factors appeared to play an important role in missing an aneurysm on a cerebral angiogram.
authors.affiliation: Afd. Neurologie, St. Elisabeth Ziekenhuis, Postbus 90.151, 5000 LC Tilburg.
authors.forename: M P W A
authors.initials: MP
authors.lastname: Houben
authors.forename: W J J
authors.initials: WJ
authors.lastname: van Rooij
authors.forename: M
authors.initials: M
authors.lastname: Sluzewski
authors.forename: C C
authors.initials: CC
authors.lastname: Tijssen
mesh_terms: D000328:Adult; D000368:Aged; D002533:Cerebral Angiography / Q000379:methods*; D002543:Cerebral Hemorrhage / Q000000981:diagnostic imaging*; D003951:Diagnostic Errors; D003952:Diagnostic Imaging; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D008297:Male; D008636:Mesencephalon / Q000000981:diagnostic imaging; D008875:Middle Aged; D012189:Retrospective Studies