Yasushi Koyama

5.1k total citations
208 papers, 3.9k citations indexed

About

Yasushi Koyama is a scholar working on Cardiology and Cardiovascular Medicine, Molecular Biology and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Yasushi Koyama has authored 208 papers receiving a total of 3.9k indexed citations (citations by other indexed papers that have themselves been cited), including 68 papers in Cardiology and Cardiovascular Medicine, 60 papers in Molecular Biology and 44 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Yasushi Koyama's work include Photosynthetic Processes and Mechanisms (42 papers), Cardiac Imaging and Diagnostics (37 papers) and Spectroscopy and Quantum Chemical Studies (34 papers). Yasushi Koyama is often cited by papers focused on Photosynthetic Processes and Mechanisms (42 papers), Cardiac Imaging and Diagnostics (37 papers) and Spectroscopy and Quantum Chemical Studies (34 papers). Yasushi Koyama collaborates with scholars based in Japan, United States and United Kingdom. Yasushi Koyama's co-authors include Michitaka Kuki, Hideki Hashimoto, Kiyoshi Tsukida, Kayoko Saiki, Teruhito Mochizuki, Hiroyoshi Nagae, Katsuomi Iwakura, Kenshi Fujii, Koichi Inoue and Atsunori Okamura and has published in prestigious journals such as Journal of Biological Chemistry, Circulation and The Journal of Chemical Physics.

In The Last Decade

Yasushi Koyama

196 papers receiving 3.7k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Yasushi Koyama Japan 35 1.3k 913 799 744 503 208 3.9k
Qian Pu China 37 2.1k 1.7× 530 0.6× 809 1.0× 62 0.1× 174 0.3× 147 4.0k
William W. Mantulin United States 36 1.0k 0.8× 213 0.2× 318 0.4× 1.2k 1.6× 43 0.1× 84 3.8k
Hideyuki Hara Japan 28 816 0.6× 521 0.6× 324 0.4× 163 0.2× 43 0.1× 144 3.0k
Matthias Müller Germany 37 1.6k 1.3× 149 0.2× 210 0.3× 309 0.4× 57 0.1× 233 5.8k
Yanjun Zhang China 34 1.5k 1.2× 364 0.4× 257 0.3× 65 0.1× 184 0.4× 154 3.9k
R. Kaufmann Germany 39 1.8k 1.5× 1.1k 1.2× 155 0.2× 108 0.1× 65 0.1× 121 4.7k
Thomas W. Smith United States 37 2.7k 2.2× 748 0.8× 73 0.1× 247 0.3× 34 0.1× 69 5.4k
R.G. Gosling United Kingdom 26 1.1k 0.9× 1.6k 1.8× 130 0.2× 512 0.7× 26 0.1× 58 4.1k
Keiji Iriyama Japan 28 1.2k 1.0× 64 0.1× 624 0.8× 93 0.1× 66 0.1× 221 3.5k
T. Horio Japan 34 529 0.4× 809 0.9× 1.1k 1.3× 123 0.2× 21 0.0× 147 3.4k

Countries citing papers authored by Yasushi Koyama

Since Specialization
Citations

This map shows the geographic impact of Yasushi Koyama'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 Yasushi Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Yasushi Koyama more than expected).

Fields of papers citing papers by Yasushi Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Yasushi Koyama. 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 Yasushi Koyama. The network helps show where Yasushi Koyama may publish in the future.

Co-authorship network of co-authors of Yasushi Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Yasushi Koyama. A scholar is included among the top collaborators of Yasushi Koyama 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 Yasushi Koyama. Yasushi Koyama 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.
Tanaka, Kota, Atsunori Okamura, Etsuo Tsuchikane, et al.. (2024). Tip Detection–Antegrade Dissection and Re-Entry With New Puncture Wire in CTO Intervention. JACC Asia. 4(5). 359–372. 12 indexed citations
2.
Okada, Masato, Nobuaki Tanaka, Toshinari Onishi, et al.. (2023). Impact of Residual Functional Mitral Regurgitation After Atrial Fibrillation Ablation on Clinical Outcomes in Patients With Left Ventricular Systolic Dysfunction. The American Journal of Cardiology. 191. 66–75. 5 indexed citations
3.
4.
Inoue, Koichi, Naoya Oketani, Hitoshi Ichiki, et al.. (2021). Decrease in red cell distribution width as a useful predictor of success after catheter ablation for atrial fibrillation: a retrospective multi-center study. Heart and Vessels. 37(1). 99–109. 1 indexed citations
5.
Ninomiya, Yuichi, Koichi Inoue, Nobuaki Tanaka, et al.. (2021). Absence of first‐pass isolation is associated with poor pulmonary vein isolation durability and atrial fibrillation ablation outcomes. Journal of Arrhythmia. 37(6). 1468–1476. 24 indexed citations
6.
Nakamaru, Ryo, Masato Okada, Nobuaki Tanaka, et al.. (2019). Outcomes After Atrial Fibrillation Ablation in Patients With Premature Atrial Contractions Originating From Non-Pulmonary Veins. JACC. Clinical electrophysiology. 5(11). 1319–1327. 15 indexed citations
7.
Oka, Takafumi, Koichi Inoue, Koji Tanaka, et al.. (2018). Left Atrial Reverse Remodeling After Catheter Ablation of Nonparoxysmal Atrial Fibrillation in Patients With Heart Failure With Reduced Ejection Fraction. The American Journal of Cardiology. 122(1). 89–96. 22 indexed citations
8.
Tanaka, Nobuaki, Koichi Inoue, Koji Tanaka, et al.. (2017). Abstract 18922: Is Treatment for Paroxysmal Atrial Fibrillation With Second-generation Cryoballoon Ablation More Reproducible Than That With Contact Force Guided Radiofrequency Ablation?. Circulation. 1 indexed citations
9.
Sato, Shinji, et al.. (2016). A Case of Dermatomyositis and Anti-EJ Autoantibody with Chronic Intestinal Pseudoobstruction Successfully Treated with Octreotide. SHILAP Revista de lepidopterología. 2016. 1–5. 5 indexed citations
10.
11.
Iwakura, Katsuomi, Atsunori Okamura, Yasushi Koyama, et al.. (2013). Abstract 15306: Detection of Left Ventricular Diastolic Dysfunction Using P Wave Morphology on Electrocardiography. Circulation. 128. 1 indexed citations
12.
Kurotobi, Toshiya, Hiroshi Ito, Katsuomi Iwakura, et al.. (2008). OE-036 Residual Non-pulmonary Vein arrhthmogenic Foci Predict the Recurrence of Tachyarrhythmia in Patients with Atrial Fibrillation Undergoing Catheter Ablation(Arrhythmia, diagnosis/Pathophysiology/EPS(01)(A),Oral Presentation(English),The 72nd Annual Scientific Meeting of the Japanese Circulation Society). Japanese Circulation Journal-english Edition. 72. 189–190. 6 indexed citations
13.
Sato, Yuichi, Naoya Matsumoto, Shunichi Yoda, et al.. (2006). Left ventricular aneurysm associated with isolated noncompaction of the ventricular myocardium. Heart and Vessels. 21(3). 192–194. 13 indexed citations
14.
Aono, Jun, et al.. (2003). RADIUS Stent Treatment for Saphenous Vein Graft Stenosis. 18(3). 268–272.
15.
Hamada, Mareomi, Yuji Shigematsu, Yuji Hara, et al.. (2003). Relationship between Myocardial Fibrosis Using Gadolinium-DTPA Enhanced Magnetic Resonance Imaging and Left Ventricular Function in Hypertrophic Cardiomyopathy. Japanese Circulation Journal-english Edition. 67. 391. 5 indexed citations
16.
Lugtenburg, Johan, et al.. (1996). RESONANCE RAMAN OF DEUTERATED SPHEROIDENES RECONSTITUTED INTO THE REACTION CENTER OF R SPHAEROIDES R26. Plant and Cell Physiology. 37. 50. 1 indexed citations
17.
Mizoguchi, Tadashi, et al.. (1996). ANALYSIS OF CAROTENOIDS IN THE CAROTENOID GENES MUTANT, Rhodospirillum rubrum ST4. Plant and Cell Physiology. 37. 47. 1 indexed citations
18.
Koyama, Yasushi & Susumu Yoshida. (1994). Still Image Transmission over a Fading Channel Using ARQ Error Control. International Symposium on Information Theory and its Applications. 401. 1 indexed citations
19.
Koyama, Yasushi, et al.. (1984). Light-induced pH change inside the chromatophores of Rhodopseudomonas spheroides G1C as revealed by 31P-NMR. Photobiochemistry and photobiophysics.. 7(3). 163–174. 3 indexed citations
20.

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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