01
What the consensus proposes
No-reflow describes persistent microvascular hypoperfusion despite reopening large arteries. This Delphi consensus favours angiography alongside perfusion imaging, with CBF/CBV preferred for microvascular assessment. Assessment is preferably within six hours, excluding alternative causes. Quantitative thresholds remain unsettled; this is an expert framework requiring validation.

03 · Evidence
Original paper
01Cerebral No-Reflow after Thrombectomy: International Delphi Consensus on Definition and Imaging AssessmentMujanovic A, Rivet S, ter Schiphorst A, et al. · Annals of Neurology · 12 October 2026 · DOI: 10.1002/ana.78387
