title: Subarachnoid heamorrhage-induced chronic cerebral vasospasm in the rabbit: IV-DSA versus IA-DSA.
abstract: BACKGROUND
  Chronic cerebral vasospasm is delayed-onset cerebral arterial narrowing in response to blood clots left in the subarachnoid space after aneurysmal subarachnoid haemorrhage (SAH). Rabbit models of vasospasm have been developed as in vivo experimental pathogenesis and the treatments of cerebral vasospasm using human vessels are not possible. The present study assessed the diagnostic accuracy of the intravenous digital subtraction angiography (IV-DSA) in chronic cerebral arterial spasm following induced SAH in the rabbit.
  
  
  METHODS
  Ten rabbits' left leg veins catheterised by intravascular access needle and 3F catheters introduced to the right leg arteries probing the proximal of the vertebral arteries. Initially IV-DSA and intra-arterial digital subtraction angiography (IA-DSA) was performed. Three millilitres of fresh autologous arterial blood was injected into the cisterna magna of the ten rabbits' in order to produce in vivo model of chronic SAH. Angiograms were obtained 15 minutes and 72 hours after the SAH.
  
  
  RESULTS
  Diameters of the basilar arteries were similar to each other in both methods and reduced after the SAH.
  
  
  CONCLUSIONS
  The present study shows that IV-DSA is a relatively simple and effective method for demonstrating cerebral vessels, especially the basilar artery.
authors.affiliation: Department of Radiology, Faculty of Medicine, Ankara University, Ibn-Sina Hospital, Sihhiye, Ankara, Turkey.
authors.forename: T
authors.initials: T
authors.lastname: Sancak
authors.forename: G
authors.initials: G
authors.lastname: Silav
authors.forename: N
authors.initials: N
authors.lastname: Egemen
authors.forename: M
authors.initials: M
authors.lastname: Aldur
mesh_terms: D000818:Animals; D001488:Basilar Artery / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002908:Chronic Disease; D004195:Disease Models, Animal; D008297:Male; D011817:Rabbits; D012680:Sensitivity and Specificity; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging*; D013382:Subtraction Technique; D020301:Vasospasm, Intracranial / Q000000981:diagnostic imaging*