Syringomyelia-Chiari 2018 International Symposium Organised by the Ann Conroy Trust, in association with Aesculap Academia.


July 17-20, 2018

Birmingham, UK.


Welcome to Birmingham





The symposium is co-organised by The Ann Conroy Trust, in association with Aesculap Academia.


The Ann Conroy Trust is Registered Charity No: 1165808.

We provide Support, Education and Research for patients living with Chiari Malformation, Syringomyelia and associated conditions.

F27 Chiari type 1 malformation related blackouts.


Elhabal A, Flint G.




Chiari type 1 malformation commonly presents with Valsalva-related headaches but blackouts also sometimes form part of the presenting profile. The objective of our study was to assess the frequency of blackouts and the effect of craniovertebral decompression upon this symptom.




A retrospective cohort study of Chiari type 1 malformation patients, with and without syringomyelia, who underwent craniovertebral decompression between 2000 and 2016. We collected data on demographics and clinical symptoms of those patients whose symptomatology included blackouts.




We reviewed 241 patients operated upon for Chiari type 1 malformations between 2000 and 2016. We identified 161 patients who had only Chiari type 1 (group 1) and 80 patients with both Chiari type 1 and syringomyelia (group 2). Within the first group there were 16 patients (1 in 10) whose presenting symptom profile included blackouts. These blackouts ceased after surgery in all but one patient, in the follow up period. In group 2 we did not identify any patients who listed blackouts amongst their presenting symptoms.




Nearly all Chiari type 1 patients complaining of blackouts, as part of their symptom profile, enjoyed resolution of this symptom after decompression surgery, independently of any change in their other symptoms. The mechanism underlying Chiari-related blackouts warrants further discussion, particularly in view of their apparent lack of occurrence in patients with syringomyelia.