Predictors of Delayed Cerebral Ischemia in Patients with Aneurysmal Subarachnoid Hemorrhage with Asymptomatic Angiographic Vasospasm on Admission

Abdulrahman Aldakkan, Alireza Mansouri, Blessing N R Jaja, Naif M. Alotaibi, R. Loch Macdonald, Adam Noble, Andrew Molyneux, Audrey Quinn, Bawarjan Schatlo, Benjamin Lo, Blessing N R Jaja, Clay Johnston, Daniel Hanggi, David Hasan, George K C Wong, Hector Lantigua, Hitoshi Fukuda, James Torner, Jeff Singh, Julian SpearsKarl Schaller, Martin N. Stienen, Mervyn D I Vergouwen, Michael D. Cusimano, Michael Todd, Ming Tseng, Peter Le Roux, R. Loch Macdonald, Sen Yamagata, Stephan Mayer, Thomas Schenk, Tom A. Schweizer

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Background Risk of delayed cerebral ischemia (DCI) in patients with aneurysmal subarachnoid hemorrhage (aSAH) with asymptomatic angiographic vasospasm on admission is unclear in the literature. The goal of this study is to identify predictors of clinical DCI in this group of patients. Methods An exploratory subgroup analysis was conducted in the SAHIT (Subarachnoid Hemorrhage International Trialists) data repository to identify predictors of clinical DCI in patients with good-grade aSAH (World Federation of Neurological Surgeons grade I and II) with angiographic vasospasm on admission. Predictors considered include age, sex, systolic blood pressure at presentation, World Federation of Neurological Surgeon grade, Fisher grade, aneurysm size and location, treatment modality, hydrocephalus requiring external ventricular drain insertion, and severity of vasospasm. The predictors were ranked based on dominance analysis with R2 as fit statistics and assessed in a set of logistic regression analysis models. Results Four data sets out of 16 studies in the SAHIT database were analyzed, with a total of 4125 patients. One hundred and ninety-one patients (4.6%) had asymptomatic angiographic vasospasm at admission. Of those, 78 patients (40.8%) developed clinical DCI. Univariate analysis showed significant associations between severe vasospasm on admission and development of clinical DCI (odds ratio, 9.5, 95% confidence interval, 2.07–43.50; P = 0.004). None of the studied predictors was associated with the development of clinical DCI on multivariate analysis. Conclusions Asymptomatic angiographic vasospasm in patients with good-grade aSAH on admission is uncommon. Further studies are needed to identify high-risk patients for the development of DCI in the context of asymptomatic early vasospasm.

Original languageEnglish (US)
Pages (from-to)199-204
Number of pages6
JournalWorld neurosurgery
StatePublished - Jan 1 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Inc.


  • Aneurysmal subarachnoid hemorrhage
  • Delayed cerebral ischemia
  • Vasospasm


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