Keizo Nishiyama

902 total citations
27 papers, 756 citations indexed

About

Keizo Nishiyama is a scholar working on Cardiology and Cardiovascular Medicine, Epidemiology and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Keizo Nishiyama has authored 27 papers receiving a total of 756 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Cardiology and Cardiovascular Medicine, 5 papers in Epidemiology and 5 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Keizo Nishiyama's work include Heart Failure Treatment and Management (9 papers), Cardiovascular Function and Risk Factors (5 papers) and Adipokines, Inflammation, and Metabolic Diseases (5 papers). Keizo Nishiyama is often cited by papers focused on Heart Failure Treatment and Management (9 papers), Cardiovascular Function and Risk Factors (5 papers) and Adipokines, Inflammation, and Metabolic Diseases (5 papers). Keizo Nishiyama collaborates with scholars based in Japan. Keizo Nishiyama's co-authors include Takayoshi Tsutamoto, Minoru Horie, Takashi Yamamoto, Masanori Fujii, Masayuki Yamaji, Chiho Kawahara, Toshinari Tanaka, Hiroshi Sakai, Hiroshi Sakai and Atsuyuki Wada and has published in prestigious journals such as American Heart Journal, European Journal of Heart Failure and Circulation Heart Failure.

In The Last Decade

Keizo Nishiyama

27 papers receiving 739 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keizo Nishiyama Japan 17 532 167 109 104 98 27 756
Masayuki Yamaji Japan 14 481 0.9× 167 1.0× 128 1.2× 80 0.8× 89 0.9× 27 685
Chiho Kawahara Japan 12 440 0.8× 166 1.0× 117 1.1× 74 0.7× 81 0.8× 18 619
Claudia Agabiti-Rosei Italy 15 515 1.0× 158 0.9× 267 2.4× 87 0.8× 94 1.0× 27 889
André Duvinage Germany 14 867 1.6× 182 1.1× 92 0.8× 85 0.8× 81 0.8× 24 1.1k
Satomi Iwashita Japan 12 592 1.1× 196 1.2× 175 1.6× 72 0.7× 105 1.1× 21 842
M. Frenneaux United Kingdom 11 430 0.8× 114 0.7× 80 0.7× 70 0.7× 65 0.7× 28 779
P Pietri Greece 16 421 0.8× 124 0.7× 223 2.0× 78 0.8× 102 1.0× 46 893
Hans‐Dirk Düngen Germany 14 301 0.6× 85 0.5× 70 0.6× 104 1.0× 52 0.5× 22 546
Cosimo Sacra Italy 13 350 0.7× 146 0.9× 134 1.2× 126 1.2× 94 1.0× 29 604
Chen Chi China 15 402 0.8× 202 1.2× 103 0.9× 115 1.1× 50 0.5× 49 753

Countries citing papers authored by Keizo Nishiyama

Since Specialization
Citations

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

Fields of papers citing papers by Keizo Nishiyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keizo Nishiyama

This figure shows the co-authorship network connecting the top 25 collaborators of Keizo Nishiyama. A scholar is included among the top collaborators of Keizo Nishiyama 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 Keizo Nishiyama. Keizo Nishiyama 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.
Matsui, Toshiki, Keizo Nishiyama, Akashi Miyamoto, et al.. (2019). Indolent primary effusion lymphoma-like lymphoma in the pericardium: A case report and review of the literature. Journal of Cardiology Cases. 19(5). 148–152. 2 indexed citations
2.
Kawahara, Chiho, Takayoshi Tsutamoto, Hiroshi Sakai, et al.. (2011). Prognostic value of serial measurements of highly sensitive cardiac troponin I in stable outpatients with nonischemic chronic heart failure. American Heart Journal. 162(4). 639–645. 32 indexed citations
3.
Kawahara, Chiho, Takayoshi Tsutamoto, Keizo Nishiyama, et al.. (2010). Prognostic Role of High-Sensitivity Cardiac Troponin T in Patients With Nonischemic Dilated Cardiomyopathy. Circulation Journal. 75(3). 656–661. 65 indexed citations
4.
Yamaji, Masayuki, Takayoshi Tsutamoto, Chiho Kawahara, et al.. (2010). Effect of eplerenone versus spironolactone on cortisol and hemoglobin A1c levels in patients with chronic heart failure. American Heart Journal. 160(5). 915–921. 95 indexed citations
5.
Tsutamoto, Takayoshi, Masayuki Yamaji, Chiho Kawahara, et al.. (2009). Effect of Simvastatin vs. Rosuvastatin on Adiponectin and Haemoglobin A1c Levels in Patients with Non-Ischaemic Chronic Heart Failure. European Journal of Heart Failure. 11(12). 1195–1201. 29 indexed citations
6.
Tsutamoto, Takayoshi, Chiho Kawahara, Masayuki Yamaji, et al.. (2009). Relationship Between Renal Function and Serum Cardiac Troponin T in Patients with Chronic Heart Failure. European Journal of Heart Failure. 11(7). 653–658. 61 indexed citations
7.
Tsutamoto, Takayoshi, Keizo Nishiyama, Masayuki Yamaji, et al.. (2009). Comparison of the long-term effects of candesartan and olmesartan on plasma angiotensin II and left ventricular mass index in patients with hypertension. Hypertension Research. 33(2). 118–122. 25 indexed citations
8.
Tsutamoto, Takayoshi, Toshinari Tanaka, Keizo Nishiyama, et al.. (2009). Long-term effect of efonidipine therapy on plasma aldosterone and left ventricular mass index in patients with essential hypertension. Hypertension Research. 32(8). 670–674. 11 indexed citations
9.
Tsutamoto, Takayoshi, Chiho Kawahara, Keizo Nishiyama, et al.. (2009). Prognostic role of highly sensitive cardiac troponin I in patients with systolic heart failure. American Heart Journal. 159(1). 63–67. 83 indexed citations
10.
Yamaji, Masayuki, Takayoshi Tsutamoto, Toshinari Tanaka, et al.. (2009). Effect of Carvedilol on Plasma Adiponectin Concentration in Patients With Chronic Heart Failure. Circulation Journal. 73(6). 1067–1073. 22 indexed citations
11.
Yamaji, Masayuki, Takayoshi Tsutamoto, Toshinari Tanaka, et al.. (2009). Effect of Carperitide on Plasma Adiponectin Levels in Acute Decompensated Heart Failure Patients With Diabetes Mellitus. Circulation Journal. 73(12). 2264–2269. 10 indexed citations
12.
Yamaji, Masayuki, Takayoshi Tsutamoto, Chiho Kawahara, et al.. (2009). Serum Cortisol as a Useful Predictor of Cardiac Events in Patients With Chronic Heart Failure. Circulation Heart Failure. 2(6). 608–615. 98 indexed citations
13.
Nishiyama, Keizo, Takayoshi Tsutamoto, Masayuki Yamaji, et al.. (2009). Dose-Dependent Prognostic Effect of Carvedilol in Patients With Chronic Heart Failure Special Reference to Ranscardiac Gradient of Norepinephrine. Circulation Journal. 73(12). 2270–2275. 19 indexed citations
14.
Tanaka, Toshinari, Takayoshi Tsutamoto, Hiroshi Sakai, et al.. (2008). Effect of Atrial Natriuretic Peptide on Adiponectin in Patients with Heart Failure. European Journal of Heart Failure. 10(4). 360–366. 43 indexed citations
15.
Tsutamoto, Takayoshi, Keizo Nishiyama, Hiroshi Sakai, et al.. (2008). Transcardiac Increase in Norepinephrine and Prognosis in Patients with Chronic Heart Failure. European Journal of Heart Failure. 10(12). 1208–1214. 19 indexed citations
16.
Nishiyama, Keizo, Takayoshi Tsutamoto, Toshinari Tanaka, et al.. (2008). Transcardiac Increase in Norepinephrine and Prognosis in Patients with Chronic Heart Failure. Journal of Cardiac Failure. 14(7). S157–S157. 1 indexed citations
17.
Tsutamoto, Takayoshi, Toshinari Tanaka, Hiroshi Sakai, et al.. (2007). Plasma Level of Cardiotrophin-1 as a Prognostic Predictor in Patients with Chronic Heart Failure. European Journal of Heart Failure. 9(10). 1032–1037. 34 indexed citations
18.
Tanaka, Toshinari, Takayoshi Tsutamoto, Keizo Nishiyama, et al.. (2007). Impact of Oxidative Stress on Plasma Adiponectin in Patients With Chronic Heart Failure. Circulation Journal. 72(4). 563–568. 22 indexed citations
19.
Nishiyama, Keizo. (1992). Glycosaminoglycans of Trabecular Meshwork and Adjacent Tissues of the Rabbit Eye. Ophthalmologica. 204(1). 27–34. 2 indexed citations
20.
Nishiyama, Keizo. (1992). Glycosaminoglycans of Organ-Cultured Rabbit Trabecular Meshwork. Ophthalmologica. 204(1). 35–43. 1 indexed citations

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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