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

Polymeris, Alexandros A; Meinel, Thomas R; Oehler, Hannah; Hölscher, Kyra; Zietz, Annaelle; Scheitz, Jan F; Nolte, Christian H; Stretz, Christoph; Yaghi, Shadi; Stoll, Svenja; Wang, Ruihao; Häusler, Karl Georg; Hellwig, Simon; Klammer, Markus G; Litmeier, Simon; Leon Guerrero, Christopher R; Moeini-Naghani, Iman; Michel, Patrik; Strambo, Davide; Salerno, Alexander; ... (2022). Aetiology, secondary prevention strategies and outcomes of ischaemic stroke despite oral anticoagulant therapy in patients with atrial fibrillation. Journal of neurology, neurosurgery, and psychiatry, 93(6), pp. 588-598. BMJ Publishing Group 10.1136/jnnp-2021-328391

[img]
Preview
Text
jnnp-2021-328391.full.pdf - Published Version
Available under License Creative Commons: Attribution-Noncommercial (CC-BY-NC).

Download (1MB) | Preview

OBJECTIVE

To investigate the aetiology, subsequent preventive strategies and outcomes of stroke despite anticoagulation in patients with atrial fibrillation (AF).

METHODS

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.

RESULTS

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.

CONCLUSIONS

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.

TRIAL REGISTRATION NUMBER

ISRCTN48292829.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Meinel, Thomas Raphael; Fischer, Urs and Seiffge, David Julian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1468-330X

Publisher:

BMJ Publishing Group

Language:

English

Submitter:

Pubmed Import

Date Deposited:

11 Apr 2022 09:28

Last Modified:

29 May 2022 00:14

Publisher DOI:

10.1136/jnnp-2021-328391

PubMed ID:

35396339

Uncontrolled Keywords:

atrial fibrillation etiology outcome prevention strategies stroke despite anticoagulation

BORIS DOI:

10.48350/169191

URI:

https://boris.unibe.ch/id/eprint/169191

Actions (login required)

Edit item Edit item
Provide Feedback