Ken Nagao

8.0k total citations · 2 hit papers
243 papers, 4.8k citations indexed

About

Ken Nagao is a scholar working on Emergency Medicine, Cardiology and Cardiovascular Medicine and Surgery. According to data from OpenAlex, Ken Nagao has authored 243 papers receiving a total of 4.8k indexed citations (citations by other indexed papers that have themselves been cited), including 105 papers in Emergency Medicine, 103 papers in Cardiology and Cardiovascular Medicine and 66 papers in Surgery. Recurrent topics in Ken Nagao's work include Cardiac Arrest and Resuscitation (99 papers), Cardiac Imaging and Diagnostics (34 papers) and Mechanical Circulatory Support Devices (30 papers). Ken Nagao is often cited by papers focused on Cardiac Arrest and Resuscitation (99 papers), Cardiac Imaging and Diagnostics (34 papers) and Mechanical Circulatory Support Devices (30 papers). Ken Nagao collaborates with scholars based in Japan, United States and United Kingdom. Ken Nagao's co-authors include Taku Iwami, Takashi Kawamura, Tetsuhisa Kitamura, Hideharu Tanaka, Atsushi Hiraide, Shigemasa Tani, Atsushi Hirayama, Yoshio Tahara, Morimasa Takayama and Naoto Morimura and has published in prestigious journals such as New England Journal of Medicine, The Lancet and Circulation.

In The Last Decade

Ken Nagao

234 papers receiving 4.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Nationwide Public-Access Defibrillation in Japan

2010 435 citations Tetsuhisa Kitamura, Taku Iwami et al. profile →
Extracorporeal cardiopulmonary resuscitation versus conventional cardiopulmonary resuscitation in adults with out-of-hospital cardiac arrest: A prospective observational study

2014 364 citations Tetsuya Sakamoto, Naoto Morimura et al. Resuscitation profile →

Peers

Countries citing papers authored by Ken Nagao

Since Specialization

Citations

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

Fields of papers citing papers by Ken Nagao

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ken Nagao

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Value of plasma D-dimer level for prediction of in-hospital mortality in patients presenting with Takotsubo syndrome 2025 ·European Heart Journal Acute Cardiovascular Care ·(unknown), Tsutomu Yoshikawa, Konomi Sakata, Tetsuo Yamaguchi, (unknown), Yoichi Imori, (unknown), (unknown), (unknown), Toru Egashira, Toshiaki Otsuka, Takeshi Yamamoto, Ken Nagao, Shun Kohsaka, Morimasa Takayama	0
2	Prognostic effect of a vasopressin V2 receptor antagonist in acute congestive heart failure patients with hypoperfusion, the wet–cold pattern 2024 ·European Journal of Clinical Pharmacology ·Kenichi Matsushita, Kazumasa Harada, Takamichi Miyamoto, Kiyoshi Iida, Yoshiya Yamamoto, Yasuyuki Shiraishi, Yuji Nagatomo, Hideaki Yoshino, Takeshi Yamamoto, Ken Nagao, Morimasa Takayama	1
3	Clinical Features of 544 Patients With Ruptured Aortic Aneurysm　― A Report From the Tokyo Acute Aortic Super Network Database ― 2024 ·Circulation Journal ·Koichi Akutsu, Hideaki Yoshino, Tomoki Shimokawa, Hitoshi Ogino, Takashi Kunihara, Toshiyuki Takahashi, (unknown), Kazuhiro Watanabe, (unknown), Takeshiro Fujii, Mitsuhiro Kawata, Yoshinori Watanabe, Takeshi Yamamoto, Shun Kohsaka, Ken Nagao, (unknown)	3
4	A study of takotsubo syndrome over 9 years at the Tokyo Cardiovascular Care Unit Network Registry 2023 ·Journal of Cardiology ·(unknown), Tsutomu Yoshikawa, Toshiaki Isogai, Yoichi Imori, (unknown), Konomi Sakata, (unknown), Tetsuo Yamaguchi, Ken Nagao, Takeshi Yamamoto, Morimasa Takayama	9
5	Long-term prognostic significance of gasping in out-of-hospital cardiac arrest patients undergoing extracorporeal cardiopulmonary resuscitation: a post hoc analysis of a multi-center prospective cohort study 2023 ·Journal of Intensive Care ·Satoshi Nara, Naofumi Bunya, Hirofumi Ohnishi, Keigo Sawamoto, Shuji Uemura, Nobuaki Kokubu, Mamoru Hase, Eichi Narimatsu, (unknown), Yoshio Tahara, Takahiro Atsumi, Ken Nagao, Naoto Morimura, Tetsuya Sakamoto, (unknown)	3
6	Clinical picture of the duration of venoarterial extracorporeal membrane oxygenation: analysis from JROAD-DPC 2022 ·Heart and Vessels ·Kazuo Sakamoto, Tetsuya Matoba, Michikazu Nakai, Yoshio Tahara, Takahiro Nakashima, Hayato Hosoda, Yoshihiro Miyamoto, Kunihiro Nishimura, Yoko Sumita, Tsukasa Yagi, Kenzo Ichimura, Naohiro Yonemoto, Eizo Tachibana, Ken Nagao, Takanori Ikeda, Naoki Sato, Hiroyuki Tsutsui	0
7	Comparison of clinical outcomes between patients with pulseless-ventricular tachycardia and ventricular fibrillation in out-of-hospital cardiac arrest 2021 ·Resuscitation Plus ·(unknown), Shin‐ichiro Miura, Atsushi Hirayama, Chisato Izumi, Satoshi Yasuda, Yoshio Tahara, Naohiro Yonemoto, Hiroshi Nonogi, Ken Nagao, Takanori Ikeda, Naoki Sato, Hiroyuki Tsutsui, Yoshio Kobayashi	4
8	Association of the time to first epinephrine administration and outcomes in out-of-hospital cardiac arrest: SOS-KANTO 2012 study 2018 ·The American Journal of Emergency Medicine ·(unknown), Takashi Shiga, Hiraku Funakoshi, Dai Miyazaki, Atsushi Sakurai, Yoshio Tahara, Ken Nagao, Naohiro Yonemoto, Arino Yaguchi, Naoto Morimura	14
9	Association between cardiopulmonary resuscitation duration and one-month neurological outcomes for out-of-hospital cardiac arrest: a prospective cohort study 2017 ·BMC Anesthesiology ·(unknown), Masahiro Kashiura, Yuichi Hamabe, (unknown), Atsushi Sakurai, Yoshio Tahara, Naohiro Yonemoto, Ken Nagao, Arino Yaguchi, Naoto Morimura	14
10	Applying the termination of resuscitation rules to out-of-hospital cardiac arrests of both cardiac and non-cardiac etiologies: a prospective cohort study 2016 ·Critical Care ·Masahiro Kashiura, Yuichi Hamabe, (unknown), Atsushi Sakurai, Yoshio Tahara, Naohiro Yonemoto, Ken Nagao, Arino Yaguchi, Naoto Morimura, (unknown)	30
11	Acute Type B Aortic Dissection With Communicating vs. Non-Communicating False Lumen:– Analysis of 502 Patients From the Tokyo CCU-Network Database – 2015 ·Japanese Circulation Journal-english Edition ·Koichi Akutsu, Hideaki Yoshino, (unknown), (unknown), Yusuke Watanabe, Keiji Tanaka, Nobuya Koyama, Takeshi Yamamoto, Ken Nagao, Morimasa Takayama	4
12	拡張型心筋症患者におけるQGSによるTime to Maximum Thickening(TTMT)の診断能 2013 ·Circulation ·Naoya Matsumoto, Yasuyuki Suzuki, (unknown), (unknown), (unknown), Shunichi Yoda, Ken Nagao, Atsushi Hirayama, Yuichi Satoh	1
13	Chest Compression–Only Cardiopulmonary Resuscitation for Out-of-Hospital Cardiac Arrest With Public-Access Defibrillation 2012 ·Circulation ·Taku Iwami, Tetsuhisa Kitamura, Takashi Kawamura, Hideo Mitamura, Ken Nagao, Morimasa Takayama, Yoshihiko Seino, Hideharu Tanaka, Hiroshi Nonogi, Naohiro Yonemoto, Takeshi Kimura	79
14	低密度リポ蛋白質コレステロール/アポリポ蛋白質B比は冠動脈疾患を伴う及び伴わないスタチン治療患者で異なる有益な指標と考えられる症例対照研究 2011 ·International Heart Journal ·Shigemasa Tani, (unknown), Takeo Anazawa, Hirofumi Kawamata, (unknown), Hiroshi Takahashi, Kiyoshi Iida, (unknown), (unknown), (unknown), Ken Nagao, Atsushi Hirayama	0
15	Abstract 108: A Physician Onboard the Advanced Life Support Unit Has a Clinical Impact on Outcome of Witnessed Patients With Out-of-Hospital Cardiac Arrest 2010 ·Circulation ·Sunao Kojima, Kunihiko Matsui, Yoshihiko Seino, Hisao Ogawa, Naohiro Yonemoto, Hiroshi Nonogi, Takeshi Kimura, Ken Nagao, (unknown)	1
16	Extracorporeal cardiopulmonary resuscitation for out-of-hospital cardiac arrest 2010 ·Resuscitation ·Tetsuya Sakamoto, (unknown), Ken Nagao, (unknown), (unknown), Naoto Morimura, Takahiro Atsumi, Satoshi Nara, Mamoru Hase	2
17	病院外での心停止後、自発的循環が回復(ROSC)した患者でのアドレナリン濃度と蘇生後症候群との関係 2007 ·Circulation ·K Nishikawa, Ken Nagao, (unknown), Kenji Watanabe, Eizo Tachibana, (unknown), Yuichi Tominaga, Keiichi Tada, Noriyuki Chiba, (unknown), (unknown), (unknown), (unknown), Hisami Ikeda, (unknown), Tomoko Yagi	1
18	Abstract 7: Mild Therapeutic Hypothermia Using Extracorporeal Cooling Method In Comatose Survivors After Out-Of-Hospital Cardiac Arrest 2006 ·Circulation ·(unknown), Ken Nagao, Kimio Kikushima, Kazuhiro Watanabe, Eizo Tachibana, (unknown), (unknown), (unknown), Nobutaka Chiba, (unknown), (unknown)	1
19	Human Heart-Type Cytoplasmic Fatty Acid-Binding Protein (H-FABP) Threshold in the Emergency Diagnosis of Acute Myocardial Infarction (AMI) 2003 ·Japanese Circulation Journal-english Edition ·Kiyoshi Iida, Ken Nagao, (unknown), Kazuhiro Watanabe, (unknown), (unknown), (unknown), (unknown), Shigemasa Tani, Ikuyoshi Watanabe, Katsuo Kanmatsuse	1
20	Relationship Between Fractional Myocardial Flow Reserve and Myocardial Residual Viability in Recent Myocardial Infarction 2002 ·Japanese Circulation Journal-english Edition ·Michiaki Matsumoto, Shigemasa Tani, (unknown), (unknown), (unknown), Kimio Kikushima, Kazuhiro Watanabe, Hirofumi Kawamata, Eizo Tachibana, (unknown), Hiroaki Suzuki, Hiroshi Takahashi, Kazumiki Nomoto, (unknown), Kiyoshi Iida, (unknown), (unknown), Ikuyoshi Watanabe, Ken Nagao, Katsuo Kanmatsuse	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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