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Neurocritical Care

, Volume 20, Issue 2, pp 263–269 | Cite as

Inter-Observer Agreement on the Diagnosis of Neurocardiogenic Injury Following Aneurysmal Subarachnoid Hemorrhage

  • Jeffrey J. FletcherEmail author
  • William Meurer
  • Malcolm Dunne
  • Venkatakrishna Rajajee
  • Teresa L. Jacobs
  • Kyle M. Sheehan
  • Bart Nathan
  • Allison M. Kade
Original Article

Abstract

Background

Neurocardiogenic injury results from increased sympathetic nervous system activation following acute brain injury. No diagnostic criteria for neurocardiogenic injury exist, and agreement has not been tested. We investigated the agreement by neurointensivists for the presence of neurocardiogenic injury on routine cardiac studies.

Methods

Six neurointensivists rated 100 consecutive cases of aneurysmal subarachnoid hemorrhage (aSAH) for the presence of neurocardiogenic injury. A fixed-panel design was employed for the agreement among the whole cohort, as well as stratified by modified Fisher Scale (mFs), Hunt and Hess grade, gender, and the presence of elevated cardiac enzymes. Overall percent agreement, paired agreement, and agreement above change (Fleiss’ Kappa) were calculated. Overall percent agreement between groups was compared using Chi square tests.

Results

Six raters completed the survey for a total 600 responses. Overall percent agreement was 79.3 %, and agreement among cases at least one rater thought had neurocardiogenic injury was 66.5 % (paired agreement). Fleiss’ Kappa was 0.66 (95 % CI, 0.1–0.71; p < 0.0001), indicating substantial agreement above chance. Similarly, on subgroup analysis, significant agreement beyond chance was seen in all groups (p < 0.001). Overall percent agreement was significantly better among mFs 3–4 compared to mFs ≤ 2 (81.3 vs. 63.6 %; p = 0.018) and among cases with positive cTI (96.9 vs. 70.1 %; p ≤ 0.001).

Conclusions

Overall, we demonstrated substantial agreement for the presence of neurocardiogenic injury on early cardiac studies following aSAH. However, inter-observer variability increased when evaluating patients without the objective finding of elevated cTI and among those with lower clinical and radiographic grades.

Keywords

Aneurysmal subarachnoid hemorrhage Neurocardiogenic injury Cardiac enzymes Electrocardiogram Physician agreement 

Notes

Conflicts of interest

Jeffrey Fletcher, William Meurer, Malcolm Dunne, Venkatakrishna Rajajee, Teresa Jacobs, Kyle Sheehan, Bart Nathan, and Allison Kade declare that they have no conflicts of interest.

Funding

None.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Jeffrey J. Fletcher
    • 1
    Email author
  • William Meurer
    • 2
  • Malcolm Dunne
    • 3
  • Venkatakrishna Rajajee
    • 1
  • Teresa L. Jacobs
    • 1
  • Kyle M. Sheehan
    • 1
  • Bart Nathan
    • 3
  • Allison M. Kade
    • 1
  1. 1.Department of NeurosurgeryUniversity of MichiganAnn ArborUSA
  2. 2.Departments of Emergency Medicine and NeurologyUniversity of MichiganAnn ArborUSA
  3. 3.Department of NeurologyUniversity of VirginiaCharlottesvilleUSA

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