Aetiology, secondary prevention strategies and outcomes of ischaemic stroke despite oral anticoagulant therapy in patients with atrial fibrillation.

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Version: Final published version
License: CC BY-NC 4.0
Serval ID
serval:BIB_7D7712A8DB27
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Aetiology, secondary prevention strategies and outcomes of ischaemic stroke despite oral anticoagulant therapy in patients with atrial fibrillation.
Journal
Journal of neurology, neurosurgery, and psychiatry
Author(s)
Polymeris A.A., Meinel T.R., Oehler H., Hölscher K., Zietz A., Scheitz J.F., Nolte C.H., Stretz C., Yaghi S., Stoll S., Wang R., Häusler K.G., Hellwig S., Klammer M.G., Litmeier S., Leon Guerrero C.R., Moeini-Naghani I., Michel P., Strambo D., Salerno A., Bianco G., Cereda C., Uphaus T., Gröschel K., Katan M., Wegener S., Peters N., Engelter S.T., Lyrer P.A., Bonati L.H., Grunder L., Ringleb P.A., Fischer U., Kallmünzer B., Purrucker J.C., Seiffge D.J.
ISSN
1468-330X (Electronic)
ISSN-L
0022-3050
Publication state
Published
Issued date
06/2022
Peer-reviewed
Oui
Volume
93
Number
6
Pages
588-598
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
To investigate the aetiology, subsequent preventive strategies and outcomes of stroke despite anticoagulation in patients with atrial fibrillation (AF).
We analysed consecutive patients with AF with an index imaging-proven ischaemic stroke despite vitamin K-antagonist (VKA) or direct oral anticoagulant (DOAC) treatment across 11 stroke centres. We classified stroke aetiology as: (i) competing stroke mechanism other than AF-related cardioembolism; (ii) insufficient anticoagulation (non-adherence or low anticoagulant activity measured with drug-specific assays); or, (iii) AF-related cardioembolism despite sufficient anticoagulation. We investigated subsequent preventive strategies with regard to the primary (composite of recurrent ischaemic stroke, intracranial haemorrhage, death) and secondary endpoint (recurrent ischaemic stroke) within 3 months after index stroke.
Among 2946 patients (median age 81 years; 48% women; 43% VKA, 57% DOAC), stroke aetiology was competing mechanism in 713 patients (24%), insufficient anticoagulation in 934 (32%) and cardioembolism despite sufficient anticoagulation in 1299 (44%). We found high rates of the primary (27% of patients; completeness 91.6%) and secondary endpoint (4.6%; completeness 88.5%). Only DOAC (vs VKA) treatment after index stroke showed lower odds for both endpoints (primary: adjusted OR (aOR) (95% CI) 0.49 (0.32 to 0.73); secondary: 0.44 (0.24 to 0.80)), but not switching between different DOAC types. Adding antiplatelets showed higher odds for both endpoints (primary: aOR (95% CI) 1.99 (1.25 to 3.15); secondary: 2.66 (1.40 to 5.04)). Only few patients (1%) received left atrial appendage occlusion as additional preventive strategy.
Stroke despite anticoagulation comprises heterogeneous aetiologies and cardioembolism despite sufficient anticoagulation is most common. While DOAC were associated with better outcomes than VKA, adding antiplatelets was linked to worse outcomes in these high-risk patients. Our findings indicate that individualised and novel preventive strategies beyond the currently available anticoagulants are needed.
ISRCTN48292829.
Keywords
Administration, Oral, Aged, 80 and over, Anticoagulants/adverse effects, Atrial Fibrillation/complications, Atrial Fibrillation/drug therapy, Brain Ischemia/etiology, Brain Ischemia/prevention & control, Female, Humans, Ischemic Stroke, Male, Secondary Prevention, Stroke/drug therapy, Stroke/etiology, Stroke/prevention & control, atrial fibrillation, etiology, outcome, prevention strategies, stroke despite anticoagulation
Pubmed
Web of science
Open Access
Yes
Create date
22/04/2022 17:32
Last modification date
23/11/2022 7:12
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