The ATLAS collaboration published a systematic review and individual patient data meta-analysis in The Lancet evaluating endovascular thrombectomy — a catheter-based clot removal procedure — for patients with large-core ischemic stroke presenting up to 24 hours after symptom onset. The analysis incorporated central imaging adjudication to standardize assessment of infarct size across contributing trials. Based on the available source excerpt (title and author metadata only), specific effect sizes, sample sizes, and subgroup results cannot be reported here; the full article should be consulted for quantitative findings.
