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  • Title: Analysis of Recurrent Stroke Volume and Prognosis between Warfarin and Four Non-Vitamin K Antagonist Oral Anticoagulants' Administration for Secondary Prevention of Stroke.
    Author: Kanai Y, Oguro H, Tahara N, Matsuda H, Takayoshi H, Mitaki S, Onoda K, Yamaguchi S.
    Journal: J Stroke Cerebrovasc Dis; 2018 Feb; 27(2):338-345. PubMed ID: 29033229.
    Abstract:
    OBJECTIVE: We investigated recurrent stroke volume with nonvalvular atrial fibrillation (NVAF) patients treated with non-vitamin K antagonist oral anticoagulants (NOACs) about clinical backgrounds and number of recurrent stroke. METHODS: We administered 4 NOACs, dabigatran, rivaroxaban, apixaban, and edoxaban in 101 postcardioembolic strokes with NVAF. In a retrospective study, we measured recurrent stroke volume with magnetic resonance imaging volumetric software and compared them between 10 vitamin K anticoagulant (VKA: warfarin) cases and 13 NOAC cases under anticoagulant therapy. RESULTS: Of 101 cases, 31 were started with a VKA and switched to NOACs after 10 recurrent strokes. Other 70 cases were directly started with NOACs and 13 cases with NOACs as first anticoagulants had recurrent stroke. The frequency of recurrent stroke during anticoagulant therapy is not different between the VKA group and the 3 NOACs group. Recurrent stroke volume is significantly larger in the VKA group (26.4 cm3) than in the NOACs group (1.2 cm3). CONCLUSIONS: Secondary prevention with NOACs after stroke might be more beneficial than a VKA by reducing recurrent infarct volume.
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