Koichiro Ejima

1.1k total citations
69 papers, 618 citations indexed

About

Koichiro Ejima is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Epidemiology. According to data from OpenAlex, Koichiro Ejima has authored 69 papers receiving a total of 618 indexed citations (citations by other indexed papers that have themselves been cited), including 64 papers in Cardiology and Cardiovascular Medicine, 6 papers in Surgery and 6 papers in Epidemiology. Recurrent topics in Koichiro Ejima's work include Cardiac Arrhythmias and Treatments (46 papers), Cardiac pacing and defibrillation studies (32 papers) and Atrial Fibrillation Management and Outcomes (32 papers). Koichiro Ejima is often cited by papers focused on Cardiac Arrhythmias and Treatments (46 papers), Cardiac pacing and defibrillation studies (32 papers) and Atrial Fibrillation Management and Outcomes (32 papers). Koichiro Ejima collaborates with scholars based in Japan and United States. Koichiro Ejima's co-authors include Morio Shoda, Nobuhisa Hagiwara, Daigo Yagishita, Tetsuyuki Manaka, Kotaro Arai, Kyomi Ashihara, Satoshi Higuchi, Keiko Fukushima, Yuji Iwanami and Noritoshi Fukushima and has published in prestigious journals such as Circulation, The American Journal of Cardiology and Progress of Theoretical Physics.

In The Last Decade

Koichiro Ejima

65 papers receiving 609 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Koichiro Ejima Japan 14 572 58 55 37 34 69 618
Ziad F. Issa United States 12 438 0.8× 76 1.3× 43 0.8× 75 2.0× 44 1.3× 32 504
Osman Balta Germany 8 492 0.9× 25 0.4× 61 1.1× 44 1.2× 17 0.5× 15 504
Verena Tscholl Germany 13 322 0.6× 35 0.6× 19 0.3× 34 0.9× 37 1.1× 40 397
Tetsuyuki Manaka Japan 14 417 0.7× 44 0.8× 49 0.9× 31 0.8× 18 0.5× 32 455
Martin Bernier Canada 12 435 0.8× 25 0.4× 42 0.8× 41 1.1× 14 0.4× 36 520
Parag Barwad India 6 279 0.5× 54 0.9× 31 0.6× 73 2.0× 28 0.8× 53 363
António Creta United Kingdom 13 410 0.7× 27 0.5× 25 0.5× 37 1.0× 15 0.4× 52 498
Pierre Mondoly France 15 704 1.2× 70 1.2× 33 0.6× 80 2.2× 36 1.1× 80 762
Jayaprakash Shenthar India 16 764 1.3× 34 0.6× 78 1.4× 150 4.1× 34 1.0× 70 820
Nathalie Béhar France 14 664 1.2× 33 0.6× 30 0.5× 69 1.9× 16 0.5× 53 708

Countries citing papers authored by Koichiro Ejima

Since Specialization
Citations

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

Fields of papers citing papers by Koichiro Ejima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koichiro Ejima

This figure shows the co-authorship network connecting the top 25 collaborators of Koichiro Ejima. A scholar is included among the top collaborators of Koichiro Ejima 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 Koichiro Ejima. Koichiro Ejima 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.
Shoda, Morio, Koichiro Ejima, Daigo Yagishita, et al.. (2023). Impact of fracture‐prone implantable cardioverter defibrillator leads on long‐term patient mortality. Journal of Arrhythmia. 39(3). 454–463. 2 indexed citations
2.
Ejima, Koichiro, et al.. (2022). Prognostic significance of diastolic dysfunction in patients with systolic dysfunction undergoing atrial fibrillation ablation. IJC Heart & Vasculature. 41. 101079–101079. 1 indexed citations
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Yagishita, Daigo, et al.. (2021). Clinical outcomes of upgrade to versus de novo cardiac resynchronization therapy in mild heart failure patients with atrioventricular block. Journal of Cardiology. 79(1). 6–14. 3 indexed citations
6.
Shoda, Morio, Satoshi Saito, Daigo Yagishita, et al.. (2020). Transvenous lead extraction in a patient with polysplenia and inferior vena cava defect. Journal of Cardiology Cases. 23(1). 41–44. 3 indexed citations
7.
Higuchi, Satoshi, Koichiro Ejima, Yuichiro Minami, et al.. (2018). Long-term clinical course after catheter ablation of atrial fibrillation in patients with hypertrophic cardiomyopathy. Heart and Vessels. 34(3). 527–537. 9 indexed citations
8.
Higuchi, Satoshi, Koichiro Ejima, Morio Shoda, et al.. (2018). Impact of a prolonged interatrial conduction time for predicting the recurrence of atrial fibrillation after circumferential pulmonary vein isolation of persistent atrial fibrillation. Heart and Vessels. 34(4). 616–624. 9 indexed citations
9.
Suzuki, Atsushi, Tsuyoshi Suzuki, Koichiro Ejima, et al.. (2016). Isolated cardiac sarcoidosis diagnosed by electroanatomic voltage mapping-guided endomyocardial biopsy combined with magnetic resonance imaging and positron emission tomography. Journal of Cardiology Cases. 14(4). 107–110. 7 indexed citations
10.
Fukushima, Keiko, Noritoshi Fukushima, Koichiro Ejima, et al.. (2015). Correlation between left atrial appendage morphology and flow velocity in patients with paroxysmal atrial fibrillation. European Heart Journal - Cardiovascular Imaging. 17(1). jev117–jev117. 76 indexed citations
11.
Ejima, Koichiro, Yuji Iwanami, Daigo Yagishita, et al.. (2015). Impact of an Empiric Isolation of the Superior Vena Cava in Addition to Circumferential Pulmonary Vein Isolation on the Outcome of Paroxysmal Atrial Fibrillation Ablation. The American Journal of Cardiology. 116(11). 1711–1716. 39 indexed citations
12.
Higuchi, Satoshi, Koichiro Ejima, Tetsuyuki Manaka, Morio Shoda, & Nobuhisa Hagiwara. (2014). Catheter ablation of ventricular tachycardia associated with cardiac sarcoidosis: Targeting a low-voltage area with strict voltage criteria. Journal of Cardiology Cases. 10(4). 159–161. 1 indexed citations
13.
Ejima, Koichiro, et al.. (2013). Left brachiocephalic vein occlusion in a patient with an aortic arch aneurysm: Rare cause of obstraction for a pacemaker implantation. Journal of Cardiology Cases. 9(1). 32–34. 2 indexed citations
14.
Ejima, Koichiro, et al.. (2013). Unusual “ratchet syndrome”: spontaneous lead retraction after a generator exchange. Heart and Vessels. 29(4). 550–553. 3 indexed citations
15.
Ejima, Koichiro, Morio Shoda, Shinsuke Miyazaki, et al.. (2012). Localized reentrant tachycardia in the aorta contiguity region mimicking perimitral atrial flutter in the context of atrial fibrillation ablation. Heart and Vessels. 28(4). 546–549. 4 indexed citations
16.
Ejima, Koichiro, Morio Shoda, Tetsuyuki Manaka, & Nobuhisa Hagiwara. (2010). Successful Catheter Ablation and Documentation of the Activation and Propagation Pattern During a Left Atrial Focal Tachycardia in a Patient with Cor Triatriatum Sinister. Journal of Cardiovascular Electrophysiology. 21(9). 1050–1054. 8 indexed citations
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Ejima, Koichiro, et al.. (2007). Bi‐focal Atrial Tachycardia Mimicking Atrial Fibrillation: Fusion and Interference Between Two Distinct Tachycardias. Journal of Cardiovascular Electrophysiology. 18(11). 1210–1212. 1 indexed citations
19.
Manaka, Tomoya, Morio Shoda, T. Sato, et al.. (2005). Surgery. EP Europace. 7(s1). 77–77. 1 indexed citations
20.
Satoh, Toru, et al.. (2005). Methicillin Resistant Staphylococcus Aureus Infection of Implantable Antiarrhythmic Device. Circulation. 69. 617. 16 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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