Keiji Oi

1.8k total citations
52 papers, 1.2k citations indexed

About

Keiji Oi is a scholar working on Surgery, Cardiology and Cardiovascular Medicine and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Keiji Oi has authored 52 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Surgery, 23 papers in Cardiology and Cardiovascular Medicine and 18 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Keiji Oi's work include Cardiac Valve Diseases and Treatments (14 papers), Cardiac Structural Anomalies and Repair (10 papers) and Cardiac and Coronary Surgery Techniques (7 papers). Keiji Oi is often cited by papers focused on Cardiac Valve Diseases and Treatments (14 papers), Cardiac Structural Anomalies and Repair (10 papers) and Cardiac and Coronary Surgery Techniques (7 papers). Keiji Oi collaborates with scholars based in Japan, Thailand and South Africa. Keiji Oi's co-authors include Toyokazu Uwatoku, Hiroaki Shimokawa, Kohtaro Abe, Yasuharu Matsumoto, Kozo Kaibuchi, Akira Takeshita, Tsuyoshi Hattori, Takehisa Matsuda, Kenji Sunagawa and Takatoshi Hizume and has published in prestigious journals such as Circulation, Circulation Research and Arteriosclerosis Thrombosis and Vascular Biology.

In The Last Decade

Keiji Oi

44 papers receiving 1.2k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Keiji Oi Japan 14 400 389 322 290 199 52 1.2k
Toyokazu Uwatoku Japan 12 368 0.9× 340 0.9× 348 1.1× 235 0.8× 207 1.0× 20 1.2k
Tomohiko Shindo Japan 19 237 0.6× 541 1.4× 297 0.9× 305 1.1× 185 0.9× 48 1.4k
Fan-Yen Lee Taiwan 27 397 1.0× 597 1.5× 559 1.7× 880 3.0× 108 0.5× 95 2.1k
Pei‐Lin Shao Taiwan 22 140 0.3× 142 0.4× 794 2.5× 474 1.6× 95 0.5× 67 1.8k
Ilseon Hwang South Korea 24 546 1.4× 119 0.3× 584 1.8× 753 2.6× 297 1.5× 110 2.2k
Rui Shi China 20 156 0.4× 310 0.8× 507 1.6× 315 1.1× 76 0.4× 113 1.6k
Takanobu Tomaru Japan 19 398 1.0× 1.1k 2.9× 402 1.2× 855 2.9× 148 0.7× 88 2.1k
Anne Lejay France 21 559 1.4× 223 0.6× 307 1.0× 869 3.0× 197 1.0× 140 1.7k
Joseph L. Unthank United States 25 355 0.9× 500 1.3× 529 1.6× 668 2.3× 549 2.8× 74 1.9k
Kun Zhou China 21 453 1.1× 174 0.4× 245 0.8× 456 1.6× 79 0.4× 73 1.3k

Countries citing papers authored by Keiji Oi

Since Specialization
Citations

This map shows the geographic impact of Keiji Oi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keiji Oi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keiji Oi more than expected).

Fields of papers citing papers by Keiji Oi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keiji Oi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keiji Oi. The network helps show where Keiji Oi may publish in the future.

Co-authorship network of co-authors of Keiji Oi

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Oi. A scholar is included among the top collaborators of Keiji Oi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keiji Oi. Keiji Oi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Arai, Hirokuni, Tomoyuki Fujioka, Makoto Tomita, et al.. (2023). A prospective randomized controlled study to assess the effectiveness of super FIXSORB WAVE® for sternal stabilization after sternotomy. General Thoracic and Cardiovascular Surgery. 71(11). 665–673. 2 indexed citations
2.
Mizuno, Tomohiro, et al.. (2023). Efficacy of Thromboelastography-Guided Blood Transfusion Management in Thoracic Aortic Surgery. Annals of Thoracic Surgery Short Reports. 1(2). 349–353.
3.
Arai, Hirokuni, Tatsuki Fujiwara, Kiyoshi Tamura, et al.. (2022). Mid-term results of mitral valve reconstruction with autologous pericardial patch for active infective endocarditis with extensive leaflet destruction. General Thoracic and Cardiovascular Surgery. 70(8). 694–704. 1 indexed citations
4.
Arai, Hirokuni, Tetsuya Yoshida, Keiji Oi, et al.. (2020). Coronary Ostial Patch Angioplasty With Femoral Artery in Takayasu Arteritis. The Annals of Thoracic Surgery. 110(5). e427–e430. 3 indexed citations
5.
Hirasawa, Kensuke, Masaki Izumo, Tomoyuki Umemoto, et al.. (2020). Geometry of Tricuspid Valve Apparatus in Patients with Mitral Regurgitation due to Fibroelastic Deficiency versus Barlow Disease: A Real-Time Three-dimensional Transesophageal Echocardiography Study. Journal of the American Society of Echocardiography. 33(9). 1095–1105. 4 indexed citations
6.
Arai, Hirokuni, et al.. (2019). Safe and Effective Ultrasound-guided Myectomy and Mitral Valve Repair for HCM. The Annals of Thoracic Surgery. 108(6). e369–e371.
7.
Abe, Kohtaro, Kisho Ohtani, Kazuya Hosokawa, et al.. (2016). Optical Frequency Domain Imaging of Covered Stent-Graft for Pulmonary Artery Pseudoaneurysm After Balloon Pulmonary Angioplasty. JACC: Cardiovascular Interventions. 9(21). 2255–2256. 3 indexed citations
8.
Oi, Keiji & Hirokuni Arai. (2015). Stroke associated with coronary artery bypass grafting. General Thoracic and Cardiovascular Surgery. 63(9). 487–495. 23 indexed citations
9.
Mizuno, Tomohiro, et al.. (2015). Easy and Safe Total Debranching of Arch Aneurysms Using Axilloaxillary Arterial Bypass. The Annals of Thoracic Surgery. 100(4). 1476–1478. 3 indexed citations
10.
11.
Arai, Hirokuni, et al.. (2008). New Surgical Procedure for Ischemic/Functional Mitral Regurgitation: Mitral Complex Remodeling. The Annals of Thoracic Surgery. 85(5). 1820–1822. 19 indexed citations
12.
Yasuda, Satoshi, Toyokazu Uwatoku, Keiji Oi, et al.. (2007). In vivo Magnetic Resonance Imaging of Atherosclerotic Lesions with a Newly Developed Evans Blue-DTPA-Gadolinium Contrast Medium in Apolipoprotein-E-Deficient Mice. Journal of Vascular Research. 45(2). 123–128. 8 indexed citations
13.
Uwatoku, Toyokazu, Kenta Ito, Kohtaro Abe, et al.. (2007). Extracorporeal cardiac shock wave therapy improves left ventricular remodeling after acute myocardial infarction in pigs. Coronary Artery Disease. 18(5). 397–404. 77 indexed citations
14.
Abe, Kohtaro, Shunsuke Tawara, Keiji Oi, et al.. (2006). Long-Term Inhibition of Rho-kinase Ameliorates Hypoxia-Induced Pulmonary Hypertension in Mice. Journal of Cardiovascular Pharmacology. 48(6). 280–285. 97 indexed citations
15.
Abe, Kohtaro, et al.. (2004). Rhoキナーゼ長期阻害は内皮性NO合成とは無関係に低酸素誘発肺高血圧を改善する(Long-term Inhibition of Rho-kinase Ameliorates Hypoxia-Induced Pulmonary Hypertension in Mice Independent of Endothelial NO Synthase). Circulation. 68. 468–468. 2 indexed citations
16.
Hizume, Takatoshi, et al.. (2004). コルチゾール慢性投与はブタ冠動脈の過剰収縮を誘発する Rhoキナーゼ関与の可能性(Chronic Administration of Cortisol Induces Hyperconstriction of Porcine Coronary Arteries: Possible Involvement of Rho-Kinas). Circulation. 68. 149–150. 6 indexed citations
17.
Yamamoto, Tatsuhiro, Keiji Oi, Kohtaro Abe, et al.. (2004). In vivo MR detection of vascular endothelial injury using a new class of MRI contrast agent. Bioorganic & Medicinal Chemistry Letters. 14(11). 2787–2790. 13 indexed citations
18.
Yamamoto, Tatsuhiro, Keiji Oi, Kohtaro Abe, et al.. (2004). First Functionalized MRI Contrast Agent Recognizing Vascular Lesions. Analytical Sciences. 20(1). 5–7. 8 indexed citations
19.
Abe, Kohtaro, Toyokazu Uwatoku, Yasuharu Matsumoto, et al.. (2003). Long-Term Inhibition of Rho-Kinase Markedly Ameliorates Monocrotaline-lnduced Pulmonary Hypertension in Rats. Japanese Circulation Journal-english Edition. 67. 245. 2 indexed citations
20.
Matsumoto, Yasuharu, Toyokazu Uwatoku, Tsuyoshi Hattori, et al.. (2003). Rhoキナーゼ長期阻害はステント植込み後のブタ冠動脈における新生内膜形成を抑制する 複雑機序の関与(Long-Term Inhibition of Rho-Kinase Suppresses Neointimal). Circulation. 67. 153–153.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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