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H. Ishiyama · SciRah

Researcher profile · Semantic Scholar

H. Ishiyama

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H. Ishiyama — researcher profile on SciRah

h-index: 11
Works: 56
Citations: 700

Most-cited papers

Moyamoya disease: diagnosis and interventions.
M. Ihara, Yumi Yamamoto, Yorito Hattori, Wan-Yang Liu +9 more
2022Lancet Neurology316 citations
Semantic Scholar
Detrimental Effect of Chronic Hypertension on Leptomeningeal Collateral Flow in Acute Ischemic Stroke.
Kyohei Fujita, Kanta Tanaka, H. Yamagami, Toshihiro Ide +8 more
2019Stroke50 citations Open access
Semantic Scholar
Oral Carriage of Streptococcus mutans Harboring the cnm Gene Relates to an Increased Incidence of Cerebral Microbleeds
Satoshi Hosoki, S. Saito, S. Tonomura, H. Ishiyama +16 more
2020Stroke43 citations Open access
Semantic Scholar
Antiseizure medications for post‐stroke epilepsy: A real‐world prospective cohort study
Tomotaka Tanaka, Kazuki Fukuma, Soichiro Abe, Soichiro Matsubara +20 more
2021Brain and Behavior35 citations Open access
Semantic Scholar
Association of Cortical Superficial Siderosis with Post‐Stroke Epilepsy
Tomotaka Tanaka, Kazuki Fukuma, Soichiro Abe, Soichiro Matsubara +15 more
2022Annals of Neurology32 citations Open access
Semantic Scholar
Disease Severity Staging System for NOTCH3-Associated Small Vessel Disease, Including CADASIL
Gido Gravesteijn, J. Rutten, Minne N. Cerfontaine, Remco J. Hack +46 more
2024JAMA Neurology22 citations Open access
Semantic Scholar
Statin treatment can reduce incidence of early seizure in acute ischemic stroke: A propensity score analysis
Soichiro Matsubara, Tomotaka Tanaka, S. Tomari, Kazuki Fukuma +10 more
2020Scientific Reports22 citations Open access
Semantic Scholar
Interictal epileptiform discharges as a predictive biomarker for recurrence of poststroke epilepsy
Soichiro Abe, Tomotaka Tanaka, Kazuki Fukuma, Soichiro Matsubara +29 more
2022Brain Communications19 citations Open access
Semantic Scholar
Tmax Mismatch Ratio to Identify Intracranial Atherosclerotic Stenosis‐Related Large‐Vessel Occlusion Before Endovascular Therapy
T. Yoshimoto, M. Inoue, Kanta Tanaka, Junpei Koge +9 more
2023Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease18 citations Open access
Semantic Scholar
Pro‐Hemorrhagic Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy Associated with NOTCH3 p.R75P Mutation with Low Vascular NOTCH3 Aggregation Property
H. Ishiyama, Hyunjin Kim, S. Saito, S. Takeda +21 more
2024Annals of Neurology17 citations Open access
Semantic Scholar
RNF213 p.R4810K Variant Increases the Risk of Vasospastic Angina
H. Ishiyama, Tomotaka Tanaka, T. Yoshimoto, Atsushi Takahashi +6 more
2023JACC: Asia14 citations Open access
Semantic Scholar
Electroencephalographic findings in Bickerstaff’s brainstem encephalitis: A possible reflection of the dysfunction of the ascending reticular activating system
H. Yoshimura, M. Togo, J. Ishii, H. Ishiyama +6 more
2020Clinical Neurophysiology Practice10 citations Open access
Semantic Scholar
A multicenter, single-arm, phase II clinical trial of adrenomedullin in patients with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
K. Washida, S. Saito, Tomotaka Tanaka, Y. Nakaoku +16 more
2024Cerebral Circulation - Cognition and Behavior9 citations Open access
Semantic Scholar
Plasma mid‐regional pro‐adrenomedullin: A biomarker of the ischemic penumbra in hyperacute stroke
H. Ishiyama, Tomotaka Tanaka, S. Saito, Teruhide Koyama +9 more
2022Brain Pathology9 citations Open access
Semantic Scholar
Association of thyroid peroxidase antibody with the RNF213 p.R4810K variant in ischemic stroke/transient ischemic attack.
T. Yoshimoto, H. Ishiyama, Yorito Hattori, Kunihiro Nishimura +16 more
2023Atherosclerosis8 citations Open access
Semantic Scholar
Neurological Manifestations and Long-term Sequelae in Hospitalized Patients with COVID-19
H. Ishiyama, J. Ishii, H. Yoshimura, Marie Tsunogae +12 more
2021Internal medicine8 citations Open access
Semantic Scholar
Detrimental effect of anemia after mechanical thrombectomy on functional outcome in patients with ischemic stroke
R. Inui, Junpei Koge, Kanta Tanaka, T. Yoshimoto +9 more
2023Frontiers in Neurology7 citations Open access
Semantic Scholar
Stent Retriever Angioplasty for Intracranial Atherosclerotic Disease-Related Medium Vessel Occlusion: A Case Report and Literature Review
R. Inui, Soichiro Abe, H. Ishiyama, Takeyoshi Tsutsui +6 more
2024Journal of Neuroendovascular Therapy6 citations Open access
Semantic Scholar
Periodic discharges plus fast activity on electroencephalogram predict worse outcomes in poststroke epilepsy
Kazuki Fukuma, Maya Tojima, Tomotaka Tanaka, K. Kobayashi +16 more
2023Epilepsia6 citations
Semantic Scholar
A Noonan‐like pediatric patient with a de novo CBL pathogenic variant and an RNF213 polymorphism p.R4810K presenting with cardiopulmonary arrest due to left main coronary artery ostial atresia
Ayako Chida-Nagai, H. Tonoki, N. Makita, H. Ishiyama +11 more
2023American Journal of Medical Genetics. Part A6 citations
Semantic Scholar
CYP2C19 Polymorphism and Clopidogrel Efficacy in Long-Term Outcomes of Large-Artery Atherosclerotic Stroke
T. Yoshimoto, Yorito Hattori, H. Ishiyama, Y. Nakaoku +5 more
2025JACC: Asia5 citations
Semantic Scholar
High pillow and spontaneous vertebral artery dissection: A case-control study implicating “Shogun pillow syndrome”
Shuhei Egashira, Tomotaka Tanaka, Takayuki Yamashiro, S. Saito +12 more
2024European Stroke Journal5 citations Open access
Semantic Scholar
Efficacy and safety of adrenomedullin for acute ischemic stroke (AMFIS): a phase 2, randomized, double-blinded, placebo-controlled, clinical trial
T. Yoshimoto, S. Saito, K. Omae, Kenta Tanaka +15 more
2024EClinicalMedicine5 citations Open access
Semantic Scholar
Harboring Cnm‐expressing Streptococcus mutans in the oral cavity relates to both deep and lobar cerebral microbleeds
S. Ikeda, S. Saito, Satoshi Hosoki, S. Tonomura +16 more
2021European Journal of Neurology5 citations Open access
Semantic Scholar
Leuconostoc lactis- A Rare Cause of Bacterial Meningitis in an Immunocompromised Host
R. Omori, S. Fujiwara, H. Ishiyama, H. Kuroda +1 more
2020Internal medicine5 citations Open access
Semantic Scholar
Blended Phenotype of NOTCH3 and RNF213 Variants With Accelerated Large and Small Artery Crosstalk
S. Saito, Satoshi Hosoki, Eriko Yamaguchi, H. Ishiyama +9 more
2024Neurology: Genetics4 citations Open access
Semantic Scholar
Case report: Near-complete cortical hearing loss caused by sequential development of bilateral putaminal hemorrhage
Yoshito Arakaki, T. Yoshimoto, H. Ishiyama, Tomotaka Tanaka +2 more
2022eNeurologicalSci3 citations Open access
Semantic Scholar
Rolling stones sign as hard and fast evidence of calcified cerebral emboli
H. Ishiyama, S. Okazaki, Kozue Saito, H. Yamagami +1 more
2018Neurology3 citations
Semantic Scholar
Long-term outcomes in the pre-moyamoya stage of RNF213-related vasculopathy presenting with ischaemic stroke or transient ischaemic attack: insights from the NCVC Genome Registry
T. Yoshimoto, Yorito Hattori, H. Ishiyama, E. Kiyoshige +11 more
2026The Lancet Regional Health - Western Pacific2 citations Open access
Semantic Scholar
Thrombus Age in Ischemic Stroke With Atrial Fibrillation: Impact on Mechanical Thrombectomy
Junpei Koge, Kinta Hatakeyama, Kanta Tanaka, T. Yoshimoto +13 more
2024Stroke2 citations Open access
Semantic Scholar
Cardioembolism after thoracoscopic left atrial appendage clipping in a patient on oral anticoagulation therapy.
R. Inui, T. Yoshimoto, H. Ishiyama, Shinichi Kurashima +4 more
2023Journal of Cardiology Cases2 citations Open access
Semantic Scholar
Predictive Value of Midregional Pro–Atrial Natriuretic Peptide for Cardioembolic Stroke in Hyperacute Ischemic Stroke
H. Ikenouchi, S. Saito, H. Ishiyama, Akihiro Kitamura +9 more
2024Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease1 citations Open access
Semantic Scholar
Optimizing endovascular therapy for large vessel occlusion using CYP2C19 genotype-guided antiplatelet therapy: a case report
R. Inui, H. Ishiyama, Soichiro Abe, T. Yoshimoto +5 more
2023Journal of Laboratory and Precision Medicine1 citations Open access
Semantic Scholar
Uncovering the genetic architecture of paediatric moyamoya angiopathy: implications for disease pathogenesis
H. Ishiyama, M. Ihara
2023European Journal of Human Genetics1 citations Open access
Semantic Scholar
Clinical and imaging features of nonmotor onset seizure in poststroke epilepsy
Kazuki Fukuma, S. Ikeda, Tomotaka Tanaka, Naruhiko Kamogawa +12 more
2022Epilepsia1 citations Open access
Semantic Scholar
Differential impact of smoking on intracerebral haemorrhage based on cerebral microbleed status: a case-control study
T. Kuroda, Tomotaka Tanaka, S. Saito, S. Bhaskar +13 more
2026BMJ Open0 citations Open access
Semantic Scholar
Prognostic Implications of Poststroke Aphasia: A Multicenter Cohort Study in Tertiary Hospitals.
Tomotaka Tanaka, Kwan-Ju Song, S. Saito, S. Bhaskar +12 more
2026Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease0 citations Open access
Semantic Scholar
Abstract A086: Classification of territorial reperfusion pattern of the middle cerebral artery after mechanical thrombectomy: a latent class analysis
Kohei Takikawa, Satoru Fujiwara, H. Ishiyama, Naruhiko Kamogawa +10 more
2026Stroke0 citations
Semantic Scholar
Abstract DP228: Impact of Balloon Sizing and Procedural Factors in Emergent Angioplasty for Intracranial Atherosclerotic Large Vessel Occlusion
Satsuki Nakajima, Tomohide Yoshie, Hirotoshi Imamura, Naruhiko Kamogawa +10 more
2026Stroke0 citations
Semantic Scholar
Vasospastic Angina (Coronary Spastic Angina) in the Left Main Trunk in a Patient With RNF213 p.R4810K Variant and a History of Moyamoya Disease.
Tasuku Kurokawa, Takeshi Niizeki, Aoi Takahata, J. Goto +6 more
2026Circulation Journal0 citations Open access
Semantic Scholar
Serum NOTCH3 Extracellular Domain in Patients With CADASIL
Hyesung Kim, Yumi Yamamoto, Y. Kim, Keon-Joo Lee +18 more
2025Neurology: Genetics0 citations Open access
Semantic Scholar
Utility of Psychological Tests in Non-demented Japanese CADASIL Patients
S. Saito, Chikage Kakuta, H. Ishiyama, Tomotaka Tanaka +1 more
2025Cerebral Circulation - Cognition and Behavior0 citations Open access
Semantic Scholar
[A Novel Subtype of Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL): Pro-hemorrhagic CADASIL].
H. Ishiyama, S. Saito, M. Ihara
2025Brain and nerve = Shinkei kenkyu no shinpo0 citations
Semantic Scholar
[Early-onset cerebral infarction with psoriasis vulgaris and thromboangiitis obliterans as an athterosclerotic risk factor: a case report].
Yasunobu Inagaki, Soichiro Abe, H. Ishiyama, T. Yoshimoto +2 more
2025Rinshō shinkeigaku Clinical neurology0 citations Open access
Semantic Scholar
Differential Impact of Smoking on Intracerebral Hemorrhage Based on Cerebral Microbleed Status: A Case-Control Study
T. Kuroda, T. Tanaka, S. Saito, S. Bhaskar +13 more
2025medRxiv0 citations Open access
Semantic Scholar
Abstract TP175: Hidden Core: Unveiling the Clinical Impact of CTP-Invisible Ischemic Lesions in Large Vessel Occlusion Stroke Treated with Thrombectomy
M. Inoue, Naruhiko Kamogawa, Tomohide Yoshie, Soichiro Abe +9 more
2025Stroke0 citations
Semantic Scholar
Abstract TMP87: Thrombus Age in Ischemic Stroke With Atrial Fibrillation
Junpei Koge, Kinta Hatakeyama, Kanta Tanaka, T. Yoshimoto +10 more
2024Stroke0 citations
Semantic Scholar
Abstract WMP2: A Randomized, Double-Blind, Placebo-Controlled, Phase II Trial in Acute Non-Cardioembolic Ischemic Stroke With Adrenomedullin
T. Yoshimoto, S. Saito, K. Omae, Toshihiro Kita +14 more
2024Stroke0 citations
Semantic Scholar
Preservation of Dopamine Transporters in a Patient With Micrographia Due to Cerebral Infarction: A Case Report
Yoshito Arakaki, T. Yoshimoto, H. Ishiyama, Tomotaka Tanaka +2 more
2023Journal of Movement Disorders0 citations Open access
Semantic Scholar
Abstract WP182: Association Of The RNF213 p.R4810k Variant With Thyroid Disease And Autoantibodies In Ischemic Stroke
T. Yoshimoto, Yorito Hattori, Eriko Yamaguchi, Tetsuya Chiba +7 more
2022Stroke0 citations
Semantic Scholar

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M. Ihara×25
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M. Ihara — researcher profile on SciRah
Soichiro Abe×24
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Soichiro Abe — researcher profile on SciRah
T. Yoshimoto×21
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T. Yoshimoto — researcher profile on SciRah
M. Koga×20
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M. Koga — researcher profile on SciRah

×18

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S. Saito — researcher profile on SciRah

Yorito Hattori×13

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Tomotaka Tanaka×11

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Tomotaka Tanaka — researcher profile on SciRah

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M. Ihara — researcher profile on SciRah

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