Kouichi Tokunaga

1.1k total citations
65 papers, 861 citations indexed

About

Kouichi Tokunaga is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Epidemiology. According to data from OpenAlex, Kouichi Tokunaga has authored 65 papers receiving a total of 861 indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Cardiology and Cardiovascular Medicine, 24 papers in Surgery and 24 papers in Epidemiology. Recurrent topics in Kouichi Tokunaga's work include Cardiac Valve Diseases and Treatments (19 papers), Infective Endocarditis Diagnosis and Management (15 papers) and Cardiac Ischemia and Reperfusion (15 papers). Kouichi Tokunaga is often cited by papers focused on Cardiac Valve Diseases and Treatments (19 papers), Infective Endocarditis Diagnosis and Management (15 papers) and Cardiac Ischemia and Reperfusion (15 papers). Kouichi Tokunaga collaborates with scholars based in Japan, United States and Poland. Kouichi Tokunaga's co-authors include Toshihide Asou, Hisataka Yasui, Yoshito Kawachi, Ryuji Tominaga, K Kinoshita, Hiroyuki Kohno, Jiro Tanaka, K Yonenaga, Munetaka Masuda and Motoomi Nakamura and has published in prestigious journals such as Circulation, CHEST Journal and The American Journal of Cardiology.

In The Last Decade

Kouichi Tokunaga

59 papers receiving 838 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kouichi Tokunaga Japan 17 388 373 238 216 212 65 861
Vincent R. Conti United States 13 292 0.8× 270 0.7× 100 0.4× 214 1.0× 96 0.5× 46 675
Munetaka Masuda Japan 19 520 1.3× 487 1.3× 268 1.1× 207 1.0× 280 1.3× 60 949
Shigeaki Ohtake Japan 16 276 0.7× 426 1.1× 225 0.9× 128 0.6× 171 0.8× 84 837
G. William‐Olsson Sweden 18 467 1.2× 374 1.0× 284 1.2× 202 0.9× 68 0.3× 79 1.1k
P. Satter Germany 15 297 0.8× 287 0.8× 124 0.5× 215 1.0× 89 0.4× 89 711
Ara K. Pridjian United States 15 234 0.6× 285 0.8× 293 1.2× 157 0.7× 353 1.7× 29 670
Pankaj S. Mankad United Kingdom 16 279 0.7× 416 1.1× 132 0.6× 213 1.0× 128 0.6× 45 794
Ira M. Nathan United States 18 436 1.1× 669 1.8× 684 2.9× 265 1.2× 213 1.0× 31 1.3k
D. G. Melrose United Kingdom 16 320 0.8× 275 0.7× 157 0.7× 256 1.2× 106 0.5× 46 907
Nobuhiko Hayashida Japan 22 646 1.7× 481 1.3× 181 0.8× 248 1.1× 350 1.7× 74 1.2k

Countries citing papers authored by Kouichi Tokunaga

Since Specialization
Citations

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

Fields of papers citing papers by Kouichi Tokunaga

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kouichi Tokunaga

This figure shows the co-authorship network connecting the top 25 collaborators of Kouichi Tokunaga. A scholar is included among the top collaborators of Kouichi Tokunaga 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 Kouichi Tokunaga. Kouichi Tokunaga 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.
Mayumi, Hisanori, Hiroyuki Kohno, Hisataka Yasui, Yoshito Kawachi, & Kouichi Tokunaga. (1996). Use of Automatic Mode Change Between DDD and AAI to Facilitate Native Atrioventricular Conduction in Patients with Sick Sinus Syndrome or Transient Atrioventricular Block. Pacing and Clinical Electrophysiology. 19(11). 1740–1747. 17 indexed citations
2.
Mayumi, Hisanori, et al.. (1994). Cellular kinetics of posttransfusion graft-versus-host disease after heart operations. Journal of Thoracic and Cardiovascular Surgery. 108(1). 179–182. 5 indexed citations
3.
Tominaga, Ryuji, et al.. (1993). Effects of Pump Flow Rate on Oxygen Use During Moderate Hypothermic Cardiopulmonary Bypass. ASAIO Journal. 39(2). 126–131. 4 indexed citations
4.
Asou, Toshihide, et al.. (1993). Effects of preserving mitral apparatus on ventricular systolic function in mitral valve operations in dogs. Journal of Thoracic and Cardiovascular Surgery. 106(6). 1138–1146. 18 indexed citations
5.
Mayumi, Hisanori & Kouichi Tokunaga. (1992). Constant Intravenous Infusion of Chlorpromazine for Both Sedation and After-Load Reduction in Postcardiotomy Patients under Intraaortic Balloon Pumping.. Japanese Heart Journal. 33(1). 61–71. 4 indexed citations
6.
Kohno, Hiroyuki, et al.. (1992). The myocardial recovery mode after cold storage for transplantation with Collins’ solution and cardioplegic solution. Journal of Thoracic and Cardiovascular Surgery. 104(5). 1320–1328. 5 indexed citations
7.
Kohno, Hiroyuki, et al.. (1992). Collins’ solution for cold storage of the heart for transplantation must be reversed with cardioplegic solution before reperfusion. Journal of Thoracic and Cardiovascular Surgery. 104(6). 1572–1581. 2 indexed citations
8.
Kawachi, Yoshito, et al.. (1992). Excellent durability of the Hancock porcine bioprosthesis in the tricuspid position. Journal of Thoracic and Cardiovascular Surgery. 104(6). 1561–1566. 24 indexed citations
9.
Kawachi, Yoshito, Munetaka Masuda, Ryuji Tominaga, & Kouichi Tokunaga. (1991). Comparative study between St. Jude Madical and bioprosthetic valves in the right side of the heart.. Circulation. 55(6). 553–562.
10.
Asou, Toshihide, et al.. (1991). Beneficial effect of pericardial meshing on left ventricular pump performance in dogs. Journal of Thoracic and Cardiovascular Surgery. 101(2). 260–268. 5 indexed citations
11.
Kawachi, Yoshito, Munetaka Masuda, Ryuji Tominaga, & Kouichi Tokunaga. (1991). Comparative study between St. Jude Madical and bioprosthetic valves in the right side of the heart.. Japanese Circulation Journal. 55(6). 553–562. 26 indexed citations
12.
Kinoshita, K, et al.. (1991). Delayed Time to Peak Serum Myoglobin Level as an Indicator of Cardiac Dysfunction Following Open Heart Surgery. CHEST Journal. 99(6). 1398–1402. 6 indexed citations
13.
Kinoshita, K, et al.. (1991). Superior protective effect of low-calcium, magnesium-free potassium cardioplegic solution on ischemic myocardium. Journal of Thoracic and Cardiovascular Surgery. 101(4). 695–702. 25 indexed citations
14.
Kawachi, Yoshito & Kouichi Tokunaga. (1990). Clinical comparative study between mitral mechanical and bioprosthetic valves. What is the benefit of bioprosthetic valves in the mitral position?. Japanese Circulation Journal. 54(12). 1525–1534. 7 indexed citations
15.
Kohno, Hiroyuki, et al.. (1989). The protective effects of trimetazidine on normothermic ischemic myocardium in rats. Surgery Today. 19(3). 346–350. 8 indexed citations
16.
Kinoshita, K, et al.. (1988). Double valve replacement for infective endocarditis in a hemodialysis patient: A case report. Surgery Today. 18(5). 576–579. 1 indexed citations
17.
Suzuki, Satoshi, et al.. (1988). Isolated Right Heart Purulent Pericarditis forming a Large Mediastinal Mass. CHEST Journal. 93(3). 667–668. 9 indexed citations
18.
Kohno, Hiroyuki, et al.. (1987). Cold storage of the rat heart for transplantation. Journal of Thoracic and Cardiovascular Surgery. 93(1). 86–94. 48 indexed citations
19.
Masuda, Munetaka, et al.. (1986). Myocardial protection in coronary occlusion by retrograde cardioplegic perfusion via the coronary sinus in dogs. Journal of Thoracic and Cardiovascular Surgery. 92(2). 255–263. 40 indexed citations
20.
Tokunaga, Kouichi, et al.. (1983). Development of a Distributed Microcomputer Based Engine Performance Evaluation System. SAE technical papers on CD-ROM/SAE technical paper series. 1.

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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