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International Journal of Pharmaceutical Sciences Research Volume 3 (2016), Article ID 3:IJPSR-116, 6 pages
http://dx.doi.org/10.15344/2394-1502/2016/116
Original Article
Analysis of Recurrent Stroke Volume between VKA (Vitamin K Antagonist) and Three NOACs (Non-Vitamin K Antagonist Oral Anticoagulants) under Oral Anticoagulant Therapy

Hiroaki Oguro1*, Ryo Mizuhara1, Satoshi Abe1, Hiroyuki Takayoshi1, Shingo Mitaki1, Keiichi Onoda1, Atsushi Nagai2 and Shuhei Yamaguchi1

1Department of Neurology, Shimane University, Faculty of Medicine, 1060 Nishikawatsucho, Matsue, Shimane Prefecture 690-8504, Japan
2Department of Laboratory Medicine, Shimane University, Faculty of Medicine, 1060 Nishikawatsucho, Matsue, Shimane Prefecture 690-8504, Japan
Prof. Hiroaki Oguro, Department of Neurology, Shimane University Hospital, 89-1 Enya-cho, Izumo city, Shimane 693-8501, Japan; E-mail: oguro@med.shimane-u.ac.jp
01 November 2016; 10 December 2016; 12 December 2016
Oguro H, Mizuhara R, Abe S, Takayoshi H, Mitaki S, et al. (2016) Analysis of Recurrent Stroke Volume between VKA (Vitamin K Antagonist) and Three NOACs (Non-Vitamin K Antagonist Oral Anticoagulants) under Oral Anticoagulant Therapy. Int J Pharma Sci Res 3: 116. doi: https://doi. org/10.15344/2394-1502/2016/116

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 three NOACs, dabigatran, rivaroxaban and apixaban in 84 post cardioembolic stroke with NVAF. In retrospective study, we measured recurrent stroke volume with MRI volumetry soft and compared them between 7 vitamin K anticoagulant (VKA: warfarin) cases and 10 NOACs cases under anticoagulant therapy.
Results: Of 84 cases, 27 cases were started with VKA and switched to NOACs after 7 recurrent stroke. Other 57 cases were directly started with NOACs and 10 cases with NOACs as first anticoagulants had recurrent stroke. The frequency of recurrent stroke during anticoagulant therapy are not different among VKA group and three NOACs group. Recurrent stroke volume is significantly larger in VKA group (27.4 cm3) than in NOACs group (3.3cm3).
Conclusions: Secondary prevention with NOACs after stroke might be more beneficial by reducing recurrent infarct volume than VKA.