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    Histological evaluation of acute ischemic stroke thrombi may indicate the occurrence of vessel wall injury during mechanical thrombectomy

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    Authors
    Mereuta, Oana Madalina
    Gounis, Matthew J.
    Puri, Ajit S.
    UMass Chan Affiliations
    New England Center for Stroke Research
    Department of Radiology
    Document Type
    Journal Article
    Publication Date
    2021-05-11
    Keywords
    stroke
    thrombectomy
    vessel wall
    Cardiovascular Diseases
    Nervous System Diseases
    Neurology
    Neurosurgery
    Radiology
    
    Metadata
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    Link to Full Text
    https://doi.org/10.1136/neurintsurg-2021-017310
    Abstract
    BACKGROUND: Several animal studies have demonstrated that mechanical thrombectomy (MT) for acute ischemic stroke (AIS) may cause vessel wall injury (VWI). However, the histological changes in human cerebral arteries following MT are difficult to determine. OBJECTIVE: To investigate the occurrence of VWI during MT by histological and immunohistochemical evaluation of AIS clots. METHODS: As part of the multicenter STRIP registry, 277 clots from 237 patients were analyzed using Martius Scarlett Blue stain and immunohistochemistry for CD34 (endothelial cells) and smooth muscle actin (smooth muscle cells). RESULTS: MT devices used were aspiration catheters (100 cases), stentriever (101 cases), and both (36 cases). VWI was found in 33/277 clots (12%). There was no significant correlation between VWI and MT device. The degree of damage varied from grade I (mild intimal damage, 24 clots), to grade II (relevant intimal and subintimal damage, 3 clots), and III (severe injury, 6 clots). VWI clots contained significantly more erythrocytes (p=0.006*) and less platelets/other (p=0.005*) than non-VWI clots suggesting soft thrombus material.Thrombolysis correlated with a lower rate of VWI (p=0.04*). VWI cases showed a significantly higher number of passes (2 [1-4] vs 1 [1-3], p=0.028*) and poorer recanalization outcome (p=0.01*) than cases without VWI. CONCLUSIONS: Histological markers of VWI were present in 12% of AIS thrombi, suggesting that VWI might be related to MT. VWI was associated with soft thrombus consistency, higher number of passes and poorer revascularization outcome. There was no significant correlation between VWI and MT device.
    Source

    Mereuta OM, Abbasi M, Fitzgerald S, Dai D, Kadirvel R, Hanel RA, Yoo AJ, Almekhlafi MA, Layton KF, Delgado Almandoz JE, Kvamme P, Mendes Pereira V, Jahromi BS, Nogueira RG, Gounis MJ, Patel B, Aghaebrahim A, Sauvageau E, Bhuva P, Soomro J, Demchuk AM, Thacker IC, Kayan Y, Copelan A, Nazari P, Cantrell DR, Haussen DC, Al-Bayati AR, Mohammaden M, Pisani L, Rodrigues GM, Puri AS, Entwistle J, Meves A, Arturo Larco JL, Savastano L, Cloft HJ, Kallmes DF, Doyle KM, Brinjikji W. Histological evaluation of acute ischemic stroke thrombi may indicate the occurrence of vessel wall injury during mechanical thrombectomy. J Neurointerv Surg. 2021 May 11:neurintsurg-2021-017310. doi: 10.1136/neurintsurg-2021-017310. Epub ahead of print. PMID: 33975922. Link to article on publisher's site

    DOI
    10.1136/neurintsurg-2021-017310
    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/48530
    PubMed ID
    33975922
    Notes

    Full author list omitted for brevity. For the full list of authors, see article.

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    Link to Article in PubMed

    ae974a485f413a2113503eed53cd6c53
    10.1136/neurintsurg-2021-017310
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