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Even after optimized hemodynamic management, 40% of patients with angiographically successful recanalization fail to achieve functional independence, revealing a biological ceiling beyond blood pressure optimization. I propose that pericyte contraction via endothelin-1\/ET-A receptor signaling, neutrophil CD11b\/CD18-dependent capillary plugging, and platelet microthrombus, mechanisms operating orthogonally to systemic hemodynamics, define this ceiling. I review imaging and biomarker strategies for identifying microvascular failure and discuss endothelin receptor antagonism, integrin blockade, and intra-arterial thrombolysis as therapeutic priorities for next-generation of post-thrombectomy trials.<\/jats:p>","DOI":"10.1177\/0271678x261496136","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T04:36:07Z","timestamp":1790829367000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Microvascular no-reflow after endovascular therapy: The molecular ceiling on hemodynamic optimization and the next therapeutic frontier"],"prefix":"10.1177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5813-1386","authenticated-orcid":false,"given":"Hajime","family":"Takase","sequence":"first","affiliation":[{"name":"Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA"},{"name":"YCU Center for Novel and Exploratory Clinical Trials (Y-NEXT) Yokohama City University Hospital, Yokohama, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(16)00163-X"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamaneurol.2026.1706"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.0000000000013210"},{"issue":"2","key":"e_1_3_2_5_2","first-page":"75","article-title":"Remote morphological changes in the white matter after ischaemic stroke","volume":"42","author":"Dziewulska D","year":"2004","unstructured":"Dziewulska D, Rafalowska J, Podlecka A, et al. 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