A recent analysis published in the Annals of Translational Medicine explores whether the clinical benefits of endovascular thrombectomy (EVT) for patients with large ischemic stroke cores—observed in randomized controlled trials (RCTs)—are successfully replicated in everyday clinical practice.
Endovascular thrombectomy has become a standard, life-saving intervention for acute ischemic stroke. While historically, patients with a "large infarct core" (often measured by an Alberta Stroke Program Early Computed Tomography Score, or ASPECTS, of 3 to 5) were excluded from such procedures, recent trials like the TENSION study have suggested that these patients may still achieve better functional outcomes with EVT compared to standard medical management alone.
Comparing Trial Data to Clinical Reality
Researchers led by Andrea M. Kuczynski and Dr. Philip A. Barber of the University of Calgary examined a comparative study by Winkelmeier et al., which contrasted outcomes from the TENSION trial with data from the German Stroke Registry. By using propensity score matching to ensure the groups were comparable, the study evaluated 90-day functional outcomes using the modified Rankin scale (mRS).
The findings indicated that patients treated in routine clinical practice achieved functional outcomes and mortality rates comparable to those observed in the controlled TENSION trial. There was no significant difference in the distribution of 90-day mRS scores or the likelihood of independent ambulation between the two groups.
Bridging the Gap in Stroke Care
Despite these encouraging results, the authors note that the "real-world" effectiveness of EVT for large-core strokes remains subject to uncertainty. The study highlights several challenges, including the heterogeneity of patient selection in clinical practice and the potential for selection bias in registry data. Furthermore, clinicians often remain hesitant to perform EVT on large-core patients due to concerns regarding procedural complications and reperfusion injury.
The authors conclude that while current evidence suggests that the benefits of EVT can be translated from trials to clinical settings, further research is required. Future efforts should focus on broader inclusion criteria that reflect real-world patient diversity, as well as the standardization of imaging protocols to ensure consistent and effective patient selection.
