Campbell, B. C.V. et al. (2019) Penumbral imaging and functional outcome in patients with anterior circulation ischaemic stroke treated with endovascular thrombectomy versus medical therapy: a meta-analysis of individual patient-level data.ABSTRACT Background: CT-perfusion (CTP) and MRI may assist patient selection for endovascular thrombectomy. We aimed to establish whether imaging assessments of ischaemic core and penumbra volumes were associated with functional outcomes and treatment effect.

Campbell, B. C. V. et al. (2018) Effect of general anaesthesia on functional outcome in patients with anterior circulation ischaemic stroke having endovascular thrombectomy versus standard care: a meta-analysis of individual patient data. Lancet Neurology, 17(1), pp. 47-53. (doi:10.1016/S1474-4422(17)30407-6) This is the author's final accepted version.There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it.http://eprints.gla.ac.uk/149670/ variables. An alternative approach using propensity-score stratification was also used. To account for between-trial variance we used mixed-effects modeling with a random effect for trial incorporated in all models. Bias was assessed using the Cochrane tool.Findings: Of 1764 patients in 7 trials, 871 were allocated to endovascular thrombectomy. After exclusion of 74 patients (72 who did not undergo the procedure and 2 with missing data on anaesthetic strategy), 236/797 (30%) of endovascular patients were treated under GA. At baseline, GA patients were younger and had shorter time to randomisation but similar pre-treatment clinical severity compared to non-GA. Endovascular thrombectomy improved functional outcome at 3 months versus standard care in both GA (adjusted common odds ratio (cOR) 1·52, 95%CI 1·09-2·11, p=0·014) and non-GA (adjusted cOR 2·33, 95%CI 1·75-3·10, p<0·001) patients. However, outcomes were significantly better for those treated under non-GA versus GA (covariate-adjusted cOR 1·53, 95%CI 1·14-2·04, p=0·004; propensitystratified cOR 1·44 95%CI 1·08-1·92, p=0·012). The risk of bias and variability among studies was assessed to be low.Interpretation: Worse outcomes after endovascular thrombectomy were associated with GA, after adjustment for baseline prognostic variables. These data support avoidance of GA whenever possible. The procedure did, however, remain effective versus standard care in patients treated under GA, indicating that treatment should not be withheld in those who require anaesthesia for medical reasons. Funding:The HERMES collaboration was funded by an unrestricted grant from Medtronic to the University of Calgary. Research in contextEvidence before this study between abolition of the thrombectomy treatment effect in MR CLEAN and no effect in THRACE. Three single-centre randomised trials of general anaesthesia versus conscious sedation found either no difference in functional outcome between groups or a slight benefit of general anaesthesia. Added value of this studyThese data from contemporary, high quality randomised trials form the largest study to date of the association between general anesthesia and the benefit of endovascular thrombectomy versus standard care. We used two different approaches to adjust for baseline imbalances (multivariable logistic regression and propensity-score stratification). We found that GA for endovascular thrombectomy, as practiced in contemporary clinical care across a wide range of expert centres during the rand...

No abstract

Background and Purpose-Several studies have suggested that exposure to "triggers," could precipitate the onset of ischemic stroke (IS). We performed a systematic review of the potential triggers of IS. Methods-Two independent reviewers identified studies published between January 1980 and June 2010 from MEDLINE and Embase. Where appropriate, odds ratios (ORs) were combined. Results-A total of 26 studies identified 12 potential triggers. Twenty-two studies used a case-control design, and hazard period durations ranged from 2 hours to 3 months. The majority of studies were dedicated to alcohol abuse (nϭ10) and clinical infection (nϭ12). There was a significant association between IS and alcohol abuse of Ͼ40 to 60 g within the preceding 24 hours (ORϭ2.66; 95% CI, 1.54 to 4.61) or Ͼ150 g within the previous week (ORϭ2.47; 95% CI, 1.52 to 4.02) and infection within the previous week (ORϭ2.91; 95% CI, 1.41 to 6.00) or within the previous month (ORϭ2.41; 95% CI, 1.78 to 3.27). Other triggers have been far less investigated. There was a significant association between IS and anger, heavy eating, negative or positive emotions, sudden posture change in response to a startling event, birthday, and psychological distress and no significant association with drug abuse or heavy physical exertion. Regarding methodological issues, patients were rarely blinded to study objectives, and interviewers were rarely blinded to patient status. Conclusions-Research