Keiji Hirooka

103 total papers · 1.4k total citations
35 papers, 369 citations indexed

About

Keiji Hirooka is a scholar working on Cardiology and Cardiovascular Medicine, Pulmonary and Respiratory Medicine and Surgery. According to data from OpenAlex, Keiji Hirooka has authored 35 papers receiving a total of 369 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Cardiology and Cardiovascular Medicine, 9 papers in Pulmonary and Respiratory Medicine and 7 papers in Surgery. Recurrent topics in Keiji Hirooka’s work include Heart Failure Treatment and Management (8 papers), Cardiovascular Function and Risk Factors (8 papers) and Cardiac pacing and defibrillation studies (6 papers). Keiji Hirooka is often cited by papers focused on Heart Failure Treatment and Management (8 papers), Cardiovascular Function and Risk Factors (8 papers) and Cardiac pacing and defibrillation studies (6 papers). Keiji Hirooka collaborates with scholars based in Japan, Belgium and United States. Keiji Hirooka's co-authors include Yoshio Yasumura, Kunio Miyatake, Satoshi Nakatani, Akihisa Hanatani, Masakazu Yamagishi, Mayu Nishio, Hideo Kusuoka, Doi Y, Yukihiro Koretsune and Hiroshi Kuwahara and has published in prestigious journals such as Circulation, European Heart Journal and Journal of the American Society of Echocardiography.

Co-authorship network of co-authors of Keiji Hirooka

This figure shows the co-authorship network connecting the top 25 collaborators of Keiji Hirooka. A scholar is included among the top collaborators of Keiji Hirooka 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 Hirooka. Keiji Hirooka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

Keiji Hirooka

32 papers receiving 364 citations

Fields of papers citing papers by Keiji Hirooka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Keiji Hirooka

Since Specialization
Citations

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

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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2026