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S. Okuda · SciRah

Researcher profile · Semantic Scholar

S. Okuda

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S. Okuda — researcher profile on SciRah

h-index: 23
Works: 98
Citations: 2,091

Most-cited papers

Routine Use of Intravenous Low-Dose Recombinant Tissue Plasminogen Activator in Japanese Patients: General Outcomes and Prognostic Factors From the SAMURAI Register
K. Toyoda, M. Koga, M. Naganuma, Y. Shiokawa +10 more
2009Stroke141 citations Open access
Semantic Scholar
Systolic Blood Pressure After Intravenous Antihypertensive Treatment and Clinical Outcomes in Hyperacute Intracerebral Hemorrhage: The Stroke Acute Management With Urgent Risk-Factor Assessment and Improvement-Intracerebral Hemorrhage Study
Y. Sakamoto, M. Koga, H. Yamagami, S. Okuda +14 more
2013Stroke133 citations Open access
Semantic Scholar
Reduced Estimated Glomerular Filtration Rate Is Associated with Stroke Outcome after Intravenous rt-PA: The Stroke Acute Management with Urgent Risk-Factor Assessment and Improvement (SAMURAI) rt-PA Registry
M. Naganuma, M. Koga, Y. Shiokawa, J. Nakagawara +10 more
2010Cerebrovascular Diseases115 citations Open access
Semantic Scholar
Trends in oral anticoagulant choice for acute stroke patients with nonvalvular atrial fibrillation in Japan: The SAMURAI‐NVAF Study
K. Toyoda, Arihiro Shoji, Kenichi Todo, H. Yamagami +44 more
2015International Journal of Stroke110 citations Open access
Semantic Scholar
Blood Pressure Variability on Antihypertensive Therapy in Acute Intracerebral Hemorrhage: The Stroke Acute Management With Urgent Risk-Factor Assessment and Improvement-Intracerebral Hemorrhage Study
E. Tanaka, M. Koga, J. Kobayashi, K. Kario +15 more
2014Stroke109 citations Open access
Semantic Scholar
Pretreatment ASPECTS on DWI predicts 3-month outcome following rt-PA
T. Nezu, M. Koga, K. Kimura, Y. Shiokawa +11 more
2010Neurology107 citations
Semantic Scholar
Early Neurological Deterioration within 24 Hours after Intravenous rt-PA Therapy for Stroke Patients: The Stroke Acute Management with Urgent Risk Factor Assessment and Improvement rt-PA Registry
Mayumi Mori, M. Naganuma, Yasushi Okada, Y. Hasegawa +10 more
2012Cerebrovascular Diseases103 citations Open access
Semantic Scholar
Early Ischemic Change on CT Versus Diffusion-Weighted Imaging for Patients With Stroke Receiving Intravenous Recombinant Tissue-Type Plasminogen Activator Therapy: Stroke Acute Management With Urgent Risk-factor Assessment and Improvement (SAMURAI) rt-PA Registry
T. Nezu, M. Koga, J. Nakagawara, Y. Shiokawa +11 more
2011Stroke103 citations
Semantic Scholar
Impact of Early Blood Pressure Variability on Stroke Outcomes After Thrombolysis: The SAMURAI rt-PA Registry
K. Endo, K. Kario, M. Koga, J. Nakagawara +12 more
2013Stroke98 citations Open access
Semantic Scholar
Three-month risk-benefit profile of anticoagulation after stroke with atrial fibrillation: The SAMURAI-Nonvalvular Atrial Fibrillation (NVAF) study
Arihiro Shoji, Kenichi Todo, M. Koga, E. Furui +26 more
2016International Journal of Stroke87 citations Open access
Semantic Scholar
Relationship between brainstem MRI and pathological findings in progressive supranuclear palsy--study in autopsy cases.
I. Aiba, Y. Hashizume, Mari Yoshida, S. Okuda +2 more
1997Journal of Neurological Sciences86 citations
Semantic Scholar
The Effect of Weekends and Holidays on Stroke Outcome in Acute Stroke Units
Y. Hasegawa, Y. Yoneda, S. Okuda, Ryuzo Hamada +6 more
2005Cerebrovascular Diseases83 citations
Semantic Scholar
Hospital cost of ischemic stroke and intracerebral hemorrhage in Japanese stroke centers.
Y. Yoneda, S. Okuda, R. Hamada, A. Toyota +6 more
2005Health Policy79 citations
Semantic Scholar
Systolic blood pressure lowering to 160 mmHg or less using nicardipine in acute intracerebral hemorrhage: a prospective, multicenter, observational study (the Stroke Acute Management with Urgent Risk-factor Assessment and Improvement-Intracerebral Hemorrhage study)
M. Koga, K. Toyoda, H. Yamagami, S. Okuda +12 more
2012Journal of Hypertension63 citations
Semantic Scholar
Two-Year Outcomes of Anticoagulation for Acute Ischemic Stroke With Nonvalvular Atrial Fibrillation - SAMURAI-NVAF Study.
S. Yoshimura, M. Koga, S. Sato, Kenichi Todo +36 more
2018Circulation Journal46 citations Open access
Semantic Scholar
Locomotion outcome in hemiplegic patients with middle cerebral artery infarction: the difference between right- and left-sided lesions.
Atsuko Goto, S. Okuda, S. Ito, Y. Matsuoka +3 more
2009Journal of Stroke & Cerebrovascular Diseases43 citations
Semantic Scholar
Blood glucose levels during the initial 72 h and 3-month functional outcomes in acute intracerebral hemorrhage: the SAMURAI-ICH study.
M. Koga, H. Yamagami, S. Okuda, Yasushi Okada +14 more
2015Journal of Neurological Sciences41 citations
Semantic Scholar
Higher Risk of Ischemic Events in Secondary Prevention for Patients With Persistent Than Those With Paroxysmal Atrial Fibrillation
M. Koga, S. Yoshimura, Y. Hasegawa, S. Shibuya +22 more
2016Stroke40 citations Open access
Semantic Scholar
Effect of Serum Lipid Levels on Stroke Outcome after rt-PA Therapy: SAMURAI rt-PA Registry
N. Makihara, Yasushi Okada, M. Koga, Y. Shiokawa +9 more
2012Cerebrovascular Diseases33 citations
Semantic Scholar
The acceleration of reproductive aging in Nrg1 flox/flox ;Cyp19‐Cre female mice
T. Umehara, T. Kawai, Ikko Kawashima, Katsuhiro Tanaka +4 more
2017Aging Cell32 citations Open access
Semantic Scholar
NIHSS-time score easily predicts outcomes in rt-PA patients: the SAMURAI rt-PA registry.
Junya Aoki, K. Kimura, M. Koga, K. Kario +10 more
2013Journal of Neurological Sciences32 citations
Semantic Scholar
Nationwide survey of neuro-specialists' opinions on anticoagulant therapy after intracerebral hemorrhage in patients with atrial fibrillation.
K. Maeda, M. Koga, Yasushi Okada, K. Kimura +10 more
2012Journal of Neurological Sciences30 citations
Semantic Scholar
Relative systolic blood pressure reduction and clinical outcomes in hyperacute intracerebral hemorrhage: the SAMURAI-ICH observational study
Y. Sakamoto, M. Koga, Kenichi Todo, S. Okuda +14 more
2015Journal of Hypertension23 citations
Semantic Scholar
Reduced estimated glomerular filtration rate affects outcomes 3 months after intracerebral hemorrhage: the stroke acute management with urgent risk-factor assessment and improvement-intracerebral hemorrhage study.
T. Miyagi, M. Koga, H. Yamagami, S. Okuda +11 more
2015Journal of Stroke & Cerebrovascular Diseases23 citations
Semantic Scholar
Conjugate Eye Deviation in Acute Intracerebral Hemorrhage: Stroke Acute Management With Urgent Risk-Factor Assessment and Improvement–ICH (SAMURAI-ICH) Study
S. Sato, M. Koga, H. Yamagami, S. Okuda +11 more
2012Stroke21 citations Open access
Semantic Scholar
Nationwide survey of antihypertensive treatment for acute intracerebral hemorrhage in Japan
M. Koga, K. Toyoda, M. Naganuma, K. Kario +9 more
2009Hypertension Research21 citations Open access
Semantic Scholar
Continuous Antihypertensive Therapy Throughout the Initial 24 Hours of Intracerebral Hemorrhage: The Stroke Acute Management With Urgent Risk-Factor Assessment and Improvement–Intracerebral Hemorrhage Study
J. Kobayashi, M. Koga, E. Tanaka, Yasushi Okada +14 more
2014Stroke17 citations
Semantic Scholar
国内多施設共同登録研究Stroke Acute Management with Urgent Risk-factor Assessment and Improvement (SAMURAI) rt-PA Registry：全体成績とサブ研究の紹介
K. Toyoda, M. Koga, Y. Shiokawa, J. Nakagawara +10 more
201017 citations Open access
Semantic Scholar
Early Achievement of Blood Pressure Lowering and Hematoma Growth in Acute Intracerebral Hemorrhage: Stroke Acute Management with Urgent Risk-Factor Assessment and Improvement-Intracerebral Hemorrhage Study
Yoshitaka Yamaguchi, M. Koga, S. Sato, H. Yamagami +20 more
2018Cerebrovascular Diseases16 citations
Semantic Scholar
Low-Dose Intravenous Recombinant Tissue-Type Plasminogen Activator Therapy for Patients With Stroke Outside European Indications: Stroke Acute Management with Urgent Risk-factor Assessment and Improvement (SAMURAI) rtPA Registry
M. Koga, Y. Shiokawa, J. Nakagawara, E. Furui +11 more
2012Stroke16 citations Open access
Semantic Scholar
The Mechanism of Distinct Diurnal Variations of Renin-Angiotensin System in Aorta and Heart of Spontaneously Hypertensive Rats
Y. Naito, T. Tsujino, Mika Matsumoto, S. Okuda +3 more
2009Clinical and experimental hypertension16 citations
Semantic Scholar
The relationships between three-axis accelerometer measures of physical activity and motor symptoms in patients with Parkinson’s disease: a single-center pilot study
Hiroto Ito, D. Yokoi, R. Kobayashi, H. Okada +2 more
2020BMC Neurology15 citations Open access
Semantic Scholar
Anti-ganglioside complex antibody profiles in a recurrent complicated case of GQ1b-seronegative miller fisher syndrome and Bickerstaff brainstem encephalitis: a case report
Hiroto Ito, Y. Hatanaka, Yuki Fukami, Y. Harada +5 more
2018BMC Neurology15 citations Open access
Semantic Scholar
Prior Anticoagulation and Short‐ or Long‐Term Clinical Outcomes in Ischemic Stroke or Transient Ischemic Attack Patients With Nonvalvular Atrial Fibrillation
K. Tokunaga, M. Koga, R. Itabashi, H. Yamagami +60 more
2019Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease14 citations Open access
Semantic Scholar
CHADS2 score is associated with 3-month clinical outcomes after intravenous rt-PA therapy in stroke patients with atrial fibrillation: SAMURAI rt-PA Registry.
M. Koga, K. Kimura, K. Shibazaki, Y. Shiokawa +12 more
2011Journal of Neurological Sciences13 citations
Semantic Scholar
Sex differences in blood pressure-lowering therapy and outcomes following intracerebral hemorrhage: Results from ATACH-2
Mayumi Fukuda‐Doi, H. Yamamoto, M. Koga, Y. Palesch +11 more
2020Stroke12 citations Open access
Semantic Scholar
Progressive stenosis and radiological findings of vasculitis over the entire internal carotid artery in moyamoya vasculopathy associated with graves’ disease: a case report and review of the literature
Hiroto Ito, Syunsuke Yokoi, Kinya Yokoyama, T. Asai +6 more
2019BMC Neurology12 citations Open access
Semantic Scholar
Intravenous nicardipine dosing for blood pressure lowering in acute intracerebral hemorrhage: the Stroke Acute Management with Urgent Risk-factor Assessment and Improvement-Intracerebral Hemorrhage study.
M. Koga, Arihiro Shoji, Y. Hasegawa, Y. Shiokawa +14 more
2014Journal of Stroke & Cerebrovascular Diseases12 citations
Semantic Scholar
A multicenter, prospective, observational study of warfarin-associated intracerebral hemorrhage: The SAMURAI-WAICH study.
M. Osaki, M. Koga, K. Maeda, Y. Hasegawa +12 more
2015Journal of Neurological Sciences11 citations
Semantic Scholar
The wide-ranging clinical and genetic features in Japanese families with valosin-containing protein proteinopathy.
T. Ando, R. Nakamura, S. Kuru, D. Yokoi +21 more
2020Neurobiology of Aging10 citations Open access
Semantic Scholar
Intravenous alteplase at 0.6 mg/kg for acute stroke patients with basilar artery occlusion: the stroke acute management with urgent risk factor assessment and improvement (SAMURAI) Recombinant tissue plasminogen activator registry.
T. Miyagi, M. Koga, Y. Shiokawa, J. Nakagawara +12 more
2013Journal of Stroke & Cerebrovascular Diseases10 citations
Semantic Scholar
Left Atrial Size and Ischemic Events after Ischemic Stroke or Transient Ischemic Attack in Patients with Nonvalvular Atrial Fibrillation
K. Tokunaga, M. Koga, S. Yoshimura, Yasushi Okada +31 more
2020Cerebrovascular Diseases8 citations
Semantic Scholar
Circadian Expression of Plasminogen Activator Inhibitor-1 in Angiotensin II Type 1a Receptor Knockout Mice
T. Tsujino, Y. Naito, Daizo Kawasaki, S. Okuda +4 more
2005Clinical and experimental hypertension8 citations
Semantic Scholar
Extraction of peripheral endobronchial foreign body using an ultrathin flexible bronchoscope
Masahide Oki, H. Saka, A. Kumazawa, C. Sako +2 more
20048 citations Open access
Semantic Scholar
Blood pressure during long-term cilostazol-based dual antiplatelet therapy after stroke: a post hoc analysis of the CSPS.com trial
K. Toyoda, M. Koga, Kenta Tanaka, S. Uchiyama +308 more
2024Hypertension Research6 citations Open access
Semantic Scholar
Circadian expression of plasminogen activator inhibitor-1 in angiotensin II type 1a receptor knockout mice.
T. Tsujino, Y. Naito, Daizo Kawasaki, S. Okuda +4 more
20056 citations
Semantic Scholar
Intravenous thrombolysis for patients with reverse magnetic resonance angiography and diffusion‐weighted imaging mismatch: SAMURAI and NCVC rt‐PA Registries
Y. Sakamoto, M. Koga, K. Kimura, K. Nagatsuka +13 more
2014European Journal of Neurology5 citations
Semantic Scholar
[Effects of statin use on intracranial hemorrhage and clinical outcome after intravenous rt-PA for acute ischemic stroke: SAMURAI rt-PA registry].
N. Makihara, Yasushi Okada, M. Koga, Y. Shiokawa +9 more
2010Rinshō shinkeigaku Clinical neurology5 citations Open access
Semantic Scholar
Palinopsia as an initial symptom of cerebral amyloid angiopathy-related inflammation
Hitomi Onomura, Takahiro Shimizu, R. Kobayashi, J. Suzuki +3 more
2021eNeurologicalSci4 citations Open access
Semantic Scholar
Associations between Pre-Admission Risk Scores and Two-Year Clinical Outcomes in Ischemic Stroke or Transient Ischemic Attack Patients with Non-Valvular Atrial Fibrillation
K. Tokunaga, H. Yamagami, M. Koga, Kenichi Todo +26 more
2018Cerebrovascular Diseases4 citations Open access
Semantic Scholar

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M. Koga×36
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M. Koga — researcher profile on SciRah
Yasushi Okada×35
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Yasushi Okada — researcher profile on SciRah
K. Toyoda×34
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K. Toyoda — researcher profile on SciRah
H. Yamagami×34
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Y. Hasegawa — researcher profile on SciRah

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K. Kario — researcher profile on SciRah

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Y. Shiokawa×32

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J. Nakagawara×26

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