Keiji Hirooka
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 384 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 Cardiovascular Function and Risk Factors (8 papers), Heart Failure Treatment and Management (8 papers) and Cardiac pacing and defibrillation studies (6 papers). Keiji Hirooka is often cited by papers focused on Cardiovascular Function and Risk Factors (8 papers), Heart Failure Treatment and Management (8 papers) and Cardiac pacing and defibrillation studies (6 papers). Keiji Hirooka collaborates with scholars based in Japan, United States and Belgium. Keiji Hirooka's co-authors include Yoshio Yasumura, Kunio Miyatake, Satoshi Nakatani, Akihisa Hanatani, Masakazu Yamagishi, Hideo Kusuoka, Mayu Nishio, Doi Y, Hiroshi Kuwahara and Makoto Noshiro and has published in prestigious journals such as Circulation, European Heart Journal and Journal of the American Society of Echocardiography.
In The Last Decade
Keiji Hirooka
32 papers receiving 378 citations
Peers
Keiji Hirooka
Lene Helleskov Madsen Denmark
Mikhail Vaynblat United States
Carlo Bonanno Italy
Arnaud Pellissier France
Mahwash Kassi United States
Madhu Reddy United States
Mao-Jen Lin Taiwan
D Obrador Spain
K. Endresen Norway
Daniel Pereda Spain
Citations per year, relative to Keiji Hirooka Keiji Hirooka (= 1×)
peers
Lene Helleskov Madsen
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).
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.
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.
All Works
1.
Nakatani, Satoshi, Keiko Ohta‐Ogo, Kisaki Amemiya, et al.. (2022). Microthrombosis as a cause of fulminant myocarditis-like presentation with COVID-19 proven by endomyocardial biopsy. Cardiovascular Pathology. 60. 107435–107435.
2.
Nishio, Mayu, et al.. (2020). Takotsubo syndrome triggered by coronary artery embolism in a patient with chronic atrial fibrillation. Journal of Cardiology Cases. 22(2). 45–47.
3.
Watanabe, Tetsuya, Koichi Inoue, Kazunori Kashiwase, et al.. (2018). Differences in amiodarone efficacy in relation to ejection fraction and basal rhythm in patients with implantable cardioverter defibrillators. Journal of Electrocardiology. 51(6). 1111–1115.
4.
Watanabe, Tetsuya, Keiji Hirooka, Yoshio Furukawa, et al.. (2018). Continuous ST‐Monitoring Function of Implantable Cardioverter Defibrillator Detects Silent Ischemia in Patients With Coronary Artery Disease. Journal of the American Heart Association. 7(13).
5.
Nishio, Mayu, Keiji Hirooka, & Doi Y. (2016). Chinese herbal drug natural indigo may cause pulmonary artery hypertension. European Heart Journal. 37(25). 1992–1992.
6.
Taniguchi, Tatsunori, Keiji Hirooka, Yukihiro Koretsune, et al.. (2015). Abdominal admittance helps to predict the amount of fluid accumulation in patients with acute heart failure syndromes. Journal of Cardiology. 67(4). 352–357.
7.
Sakaguchi, Taiki, Hiroki Nishida, Hiroyuki Inoue, et al.. (2015). Quantitative Assessment of Fluid Accumulation Using Bioelectrical Impedance Analysis in Patients With Acute Decompensated Heart Failure. Circulation Journal. 79(12). 2616–2622.
8.
Naito, Johji, et al.. (2009). Right atrial spontaneous echo contrast indicates a high incidence of perfusion defects in pulmonary scintigraphy in patients with atrial fibrillation. Heart and Vessels. 24(1). 32–36.
9.
Hirooka, Keiji, Tatsunori Taniguchi, Genya Hamano, et al.. (2008). Successful catheter ablation to accessory atrioventricular pathway as cardiac resynchronization therapy in a patient with dilated cardiomyopathy. EP Europace. 11(1). 121–123.
10.
Iwasaku, Toshihiro, Hideaki Kataiwa, Kenichi Komukai, et al.. (2007). PJ-483 Hemodynamic Effect Lasts for 2 Days after Short-term Infusion of Atrial Natriuretic Peptide in Patients with Chronic Heart Failure(Heart failure, clinical-12, The 71st Annual Scientific Meeting of the Japanese Circulation Society). Japanese Circulation Journal-english Edition. 71. 592–593.
11.
Saito, Makoto, Daisuke Nakayama, Mitsutaka Takada, Keiji Hirooka, & Yoshio Yasumura. (2006). Carvedilol accelerate elevation of serum potassium in chronic heart failure patients administered spironolactone plus furosemide and either enalapril maleate or candesartan cilexetil. Journal of Clinical Pharmacy and Therapeutics. 31(6). 535–540.
12.
Saito, Makoto, Mitsutaka Takada, Keiji Hirooka, F Isobe, & Yoshio Yasumura. (2005). Serum concentration of potassium in chronic heart failure patients administered spironolactone plus furosemide and either enalapril maleate, losartan potassium or candesartan cilexetil. Journal of Clinical Pharmacy and Therapeutics. 30(6). 603–610.
13.
Lazarević, Aleksandar, Satoshi Nakatani, Yutaka Okita, et al.. (2005). Determinants of rapid progression of aortic root dilatation and complications in Marfan syndrome. International Journal of Cardiology. 106(2). 177–182.
14.
Hirooka, Keiji, Johji Naito, Yukihiro Koretsune, et al.. (2003). Analysis of transmural trends in myocardial integrated backscatter in patients with progressive systemic sclerosis. Journal of the American Society of Echocardiography. 16(4). 340–346.
15.
Hirooka, Keiji, Yukihiro Koretsune, Sachiko Yoshimoto, et al.. (2003). Twice-Daily Administration of a Long-Acting Angiotensin-Converting Enzyme Inhibitor Has Greater Effects on Neurohumoral Factors than a Once-Daily Regimen in Patients with Chronic Congestive Heart Failure. Journal of Cardiovascular Pharmacology. 43(1). 56–60.
16.
Hirooka, Keiji, Yoshio Yasumura, Akihisa Hanatani, et al.. (2002). Enhanced method for predicting left ventricular reverse remodeling after surgical repair of aortic regurgitation: Application of ultrasonic tissue characterization. Journal of the American Society of Echocardiography. 15(7). 695–701.
17.
Nakatani, Satoshi, Keiji Hirooka, Izuru Nakasone, et al.. (2002). Bicuspid aortic valve stenosis complicated by descending aortic dissection mimicking coarctation of the aorta. Journal of the American Society of Echocardiography. 15(9). 994–996.
18.
Hirooka, Keiji, Akihisa Hanatani, Satoshi Nakatani, et al.. (2000). Validity and Reproducibility of Echocardiographic Measurement of Left Ventricular Ejection Fraction by Acoustic Quantification with Tissue Harmonic Imaging Technique. Journal of the American Society of Echocardiography. 13(4). 300–305.
19.
Hirooka, Keiji, et al.. (2000). Enhanced methods for visualizing myocardial perfusion with peripheral venous injection of Levovist®: Application of triggered harmonic imaging and triggered harmonic power Doppler imaging techniques. International journal of cardiac imaging. 16(4). 233–246.
20.
Ito, Ken‐ichi, Atsushi Taguchi, Nagato Sato, et al.. (2000). Intracoronary Positive and Negative Contrast Jets at a ‘Napkin Ring’ Coronary Stenosis. Japanese Circulation Journal. 64(10). 800–801.
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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