SAMURAI-NVAF Study: Anticoagulant Therapy for Japanese Stroke Patients With Nonvalvular Atrial Fibrillation (NVAF)
NCT ID: NCT01581502
Last Updated: 2015-09-02
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
1000 participants
OBSERVATIONAL
2011-09-30
2016-12-31
Brief Summary
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Detailed Description
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Conditions
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Study Design
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CASE_ONLY
PROSPECTIVE
Study Groups
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NVAF, acute ischemic stroke/TIA
Consecutive acute ischemic stroke/TIA patients with nonvalvular atrial fibrillation; most of these patients begin to receive anticoagulant therapy after index stroke/TIA for secondary prevention
This is an observational study.
This is an observational, not intervention, study.
Interventions
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This is an observational study.
This is an observational, not intervention, study.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
2. A history of prosthetic valve replacement or mitral valve surgical repair
3. Active infective endocarditis
4. Patient, family member or legally responsible person does not have given informed consent
5. Inappropriate patient's conditions for study enrollment in the opinion of the investigator
ALL
No
Sponsors
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Ministry of Health, Labour and Welfare, Japan
OTHER_GOV
Responsible Party
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Kazunori Toyoda
National Cerebral and Cardiovascular Center
Principal Investigators
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Kazunori Toyoda, MD
Role: PRINCIPAL_INVESTIGATOR
SAMURAI Study Investigators
Locations
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National Hospital Organization Nagoya Medical Center
Nagoya, Aichi-ken, Japan
Toyota Memorial Hospital
Toyota, Aichi-ken, Japan
National Hospital Organization Kyushu Medical Center
Fukuoka, Fukuoka, Japan
Brain Attack Center Ota Memorial Hospital
Fukuyama, Hiroshima, Japan
Nakamura Memorial Hospital
Sapporo, Hokkaido, Japan
Kobe City Medical Center General Hospital
Kobe, Hyōgo, Japan
National Hospital Organization Kagoshima Medical Center
Kagoshima, Kagoshima-ken, Japan
St Marianna University School of Medicine
Kawasaki, Kanagawa, Japan
Japanese Red Cross Kumamoto Hospital
Kumamoto, Kumamoto, Japan
Japanese Red Cross Kyoto Daini Hospital
Kyoto, Kyoto, Japan
South Miyagi Medical Center
Ōkawara, Miyagi, Japan
Kohnan Hospital
Sendai, Miyagi, Japan
Kawasaki Medical School
Kurashiki, Okayama-ken, Japan
National Cerebral and Cardiovascular Center
Suita, Osaka, Japan
Jichi Medical University School of Medicine
Shimotsuke, Tochigi, Japan
Kyorin University School of Medicine
Mitaka, Tokyo, Japan
Countries
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References
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Toyoda K, Arihiro S, Todo K, Yamagami H, Kimura K, Furui E, Terasaki T, Shiokawa Y, Kamiyama K, Takizawa S, Okuda S, Okada Y, Kameda T, Nagakane Y, Hasegawa Y, Mochizuki H, Ito Y, Nakashima T, Takamatsu K, Nishiyama K, Kario K, Sato S, Koga M; SAMURAI Study Investigators. Trends in oral anticoagulant choice for acute stroke patients with nonvalvular atrial fibrillation in Japan: the SAMURAI-NVAF study. Int J Stroke. 2015 Aug;10(6):836-42. doi: 10.1111/ijs.12452. Epub 2015 Jan 12.
Toyoda K. Is anticoagulant therapy unnecessary for lower-risk Japanese patients with atrial fibrillation? Lessons from the SAMURAI-NVAF and BAT studies. Circ J. 2015;79(2):307-9. doi: 10.1253/circj.CJ-14-1350. Epub 2014 Dec 24. No abstract available.
Tanaka K, Miwa K, Takagi M, Sasaki M, Yakushiji Y, Kudo K, Shiozawa M, Tanaka J, Nishihara M, Yamaguchi Y, Fujita K, Honda Y, Kawano H, Ide T, Yoshimura S, Koga M, Hirano T, Toyoda K. Increased Cerebral Small Vessel Disease Burden With Renal Dysfunction and Albuminuria in Patients Taking Antithrombotic Agents: The Bleeding With Antithrombotic Therapy 2. J Am Heart Assoc. 2022 Mar 15;11(6):e024749. doi: 10.1161/JAHA.121.024749. Epub 2022 Mar 5.
Tanaka K, Koga M, Lee KJ, Kim BJ, Mizoguchi T, Park EL, Lee J, Yoshimura S, Cha JK, Lee BC, Koge J, Bae HJ, Toyoda K; CRCS-K Investigators, the SAMURAI Study Investigators. Transesophageal Echocardiography in Ischemic Stroke With Atrial Fibrillation. J Am Heart Assoc. 2021 Nov 16;10(22):e022242. doi: 10.1161/JAHA.121.022242. Epub 2021 Nov 6.
Tanaka K, Koga M, Lee KJ, Kim BJ, Park EL, Lee J, Mizoguchi T, Yoshimura S, Cha JK, Lee BC, Nakahara J, Suzuki N, Bae HJ, Toyoda K; CRCS-K Investigators and the SAMURAI Study Investigators. Atrial Fibrillation-Associated Ischemic Stroke Patients With Prior Anticoagulation Have Higher Risk for Recurrent Stroke. Stroke. 2020 Apr;51(4):1150-1157. doi: 10.1161/STROKEAHA.119.027275. Epub 2020 Feb 26.
Mizoguchi T, Tanaka K, Toyoda K, Yoshimura S, Itabashi R, Takagi M, Todo K, Shiozawa M, Yagita Y, Yoshimoto T, Terasaki T, Yamagami H, Takizawa S, Inoue M, Kamiyama K, Ihara M, Okada Y, Kitazono T, Koga M; SAMURAI Study Investigators. Early Initiation of Direct Oral Anticoagulants After Onset of Stroke and Short- and Long-Term Outcomes of Patients With Nonvalvular Atrial Fibrillation. Stroke. 2020 Mar;51(3):883-891. doi: 10.1161/STROKEAHA.119.028118. Epub 2020 Jan 22.
Tokunaga K, Koga M, Itabashi R, Yamagami H, Todo K, Yoshimura S, Kimura K, Sato S, Terasaki T, Inoue M, Shiokawa Y, Takagi M, Kamiyama K, Tanaka K, Takizawa S, Shiozawa M, Okuda S, Okada Y, Kameda T, Nagakane Y, Hasegawa Y, Shibuya S, Ito Y, Matsuoka H, Takamatsu K, Nishiyama K, Kario K, Yagita Y, Fujita K, Ando D, Kumamoto M, Arihiro S, Toyoda K; SAMURAI Study Investigators. Prior Anticoagulation and Short- or Long-Term Clinical Outcomes in Ischemic Stroke or Transient Ischemic Attack Patients With Nonvalvular Atrial Fibrillation. J Am Heart Assoc. 2019 Feb 5;8(3):e010593. doi: 10.1161/JAHA.118.010593.
Koga M, Yoshimura S, Hasegawa Y, Shibuya S, Ito Y, Matsuoka H, Takamatsu K, Nishiyama K, Todo K, Kimura K, Furui E, Terasaki T, Shiokawa Y, Kamiyama K, Takizawa S, Okuda S, Okada Y, Kameda T, Nagakane Y, Yagita Y, Kario K, Shiozawa M, Sato S, Yamagami H, Arihiro S, Toyoda K; SAMURAI Study Investigators. Higher Risk of Ischemic Events in Secondary Prevention for Patients With Persistent Than Those With Paroxysmal Atrial Fibrillation. Stroke. 2016 Oct;47(10):2582-8. doi: 10.1161/STROKEAHA.116.013746. Epub 2016 Aug 16.
Other Identifiers
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samurai nvaf 2011
Identifier Type: REGISTRY
Identifier Source: secondary_id
samurai2011
Identifier Type: -
Identifier Source: org_study_id
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