Iwao Okai
About
Iwao Okai is a scholar working on Surgery, Cardiology and Cardiovascular Medicine and Radiology, Nuclear Medicine and Imaging.
According to data from OpenAlex, Iwao Okai has authored 58 papers receiving a total of 362 indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Surgery, 33 papers in Cardiology and Cardiovascular Medicine and 18 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Iwao Okai's work include Coronary Interventions and Diagnostics (25 papers), Cardiac Imaging and Diagnostics (18 papers) and Acute Myocardial Infarction Research (14 papers). Iwao Okai is often cited by papers focused on Coronary Interventions and Diagnostics (25 papers), Cardiac Imaging and Diagnostics (18 papers) and Acute Myocardial Infarction Research (14 papers). Iwao Okai collaborates with scholars based in Japan, United States and Israel. Iwao Okai's co-authors include Shinya Okazaki, Hiroyuki Daida, Katsumi Miyauchi, Tomotaka Dohi, Hiroshi Iwata, Yoshiteru Kato, Hiroshi Tamura, Manabu Ogita, Kikuo Isoda and Takatoshi Kasai and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and European Heart Journal.
In The Last Decade
Iwao Okai
48 papers receiving 359 citations
Peers
Iwao Okai
Steven E. Nissen United States
Roger S. Blumenthal United States
Girish Viswanathan United Kingdom
Iosif Koutagiar Greece
Przemysław Trzeciak Poland
Harlan M. Krumholz United States
Takatomo Nakajima Japan
K. Soon Australia
Marcin Protasiewicz Poland
Felipe Díez‐Delhoyo Spain
Citations per year, relative to Iwao Okai Iwao Okai (= 1×)
peers
Steven E. Nissen
Countries citing papers authored by Iwao Okai
Since
Specialization
Citations
This map shows the geographic impact of Iwao Okai'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 Iwao Okai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Iwao Okai more than expected).
Fields of papers citing papers by Iwao Okai
Since
Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences
This network shows the impact of papers produced by Iwao Okai. 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 Iwao Okai. The network helps show where Iwao Okai may publish in the future.
Co-authorship network of co-authors of Iwao Okai
This figure shows the co-authorship network connecting the top 25 collaborators of Iwao Okai. A scholar is included among the top collaborators of Iwao Okai 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 Iwao Okai. Iwao Okai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
1.
Iwata, Hiroshi, Shinichiro Doi, Hideki Wada, et al.. (2025). Prognostic impact of proteinuria in diabetic patients without chronic kidney disease undergoing percutaneous coronary intervention. PubMed. 11(1). 34–34.
2.
Dohi, Tomotaka, Miho Yokoyama, Hirohisa Endo, et al.. (2025). Wearable Devices in Remote Cardiac Rehabilitation With and Without Weekly Online Coaching for Patients With Coronary Artery Disease: Randomized Controlled Trial. JMIR mhealth and uhealth. 13. e63797–e63797.
3.
Takeuchi, Mitsuhiro, Shinichiro Doi, Hiroki Nishiyama, et al.. (2024). Association between apolipoprotein C-III levels and coronary calcification detected by intravascular ultrasound in patients who underwent percutaneous coronary intervention. Frontiers in Cardiovascular Medicine. 11. 1430203–1430203.
4.
Tomizawa, Nobuo, Yui Nozaki, Yuko Kawaguchi, et al.. (2024). Super-resolution deep learning reconstruction to improve image quality of coronary CT angiography. PubMed. 1(1). umae001–umae001.
5.
Moriya, S, Hiroshi Iwata, Shinichiro Doi, et al.. (2023). Synergistic adverse impact of diabetes and chronic kidney disease on cardiovascular mortality in patients underwent percutaneous coronary intervention. European Heart Journal. 44(Supplement_2).
6.
Doi, Shinichiro, Tomotaka Dohi, Hirohisa Endo, et al.. (2023). Impact of Low-Dose Prasugrel on Platelet Reactivity in Chronic Phase of Post-Percutaneous Coronary Intervention (CHAPERON): a Prospective Cohort Study. Cardiovascular Drugs and Therapy. 38(5). 947–957.
7.
Iwata, Hiroshi, Shinichiro Doi, Hirohisa Endo, et al.. (2022). A Prognostic Merit of Statins in Patients with Chronic Hemodialysis after Percutaneous Coronary Intervention—A 10-Year Follow-Up Study. Journal of Clinical Medicine. 11(2). 390–390.
8.
Dohi, Tomotaka, Hirohisa Endo, Shinichiro Doi, et al.. (2022). Combined impacts of low apolipoprotein A-I levels and reduced renal function on long-term prognosis in patients with coronary artery disease undergoing percutaneous coronary intervention. Clinica Chimica Acta. 536. 180–190.
9.
Dohi, Tomotaka, Mitsuaki Matsumura, Hirohisa Endo, et al.. (2022). Relationship Between Optical Coherence Tomography–Derived In‐Stent Neoatherosclerosis and the Extent of Lipid‐Rich Neointima by Near‐Infrared Spectroscopy and Intravascular Ultrasound: A Multimodal Imaging Study. Journal of the American Heart Association. 11(23). e026569–e026569.
10.
Dohi, Tomotaka, Yoshiteru Kato, Hirohisa Endo, et al.. (2021). Long-term impact of high-sensitivity C-reactive protein in patients with intermittent claudication due to peripheral artery disease following endovascular treatment. Heart and Vessels. 36(11). 1670–1678.
11.
Dohi, Tomotaka, Hirohisa Endo, Shinichiro Doi, et al.. (2021). Serum apolipoprotein E levels predict residual cardiovascular risk in patients with chronic coronary syndrome undergoing first percutaneous coronary intervention and on-statin treatment. Atherosclerosis. 333. 9–15.
12.
Dohi, Tomotaka, Hirohisa Endo, Shinichiro Doi, et al.. (2021). Long-Term Impact of β-Blocker in Elderly Patients Without Myocardial Infarction After Percutaneous Coronary Intervention. ESC Heart Failure. 9(1). 545–554.
13.
Fujimoto, Shinichiro, Yui Nozaki, Chihiro Aoshima, et al.. (2021). Incremental Diagnostic Value of CT Fractional Flow Reserve Using Subtraction Method in Patients with Severe Calcification: A Pilot Study. Journal of Clinical Medicine. 10(19). 4398–4398.
14.
Dohi, Tomotaka, Hirohisa Endo, Shinichiro Doi, et al.. (2021). The prognostic implications of chronic kidney disease and anemia on long-term outcomes in patients undergoing percutaneous coronary intervention. Heart and Vessels. 36(8). 1117–1124.
15.
Noguchi, Masahiko, Tomotaka Dohi, Shinya Okazaki, et al.. (2021). Comparison of 6‐month vascular healing response after bioresorbable polymer versus durable polymer drug‐eluting stent implantation in patients with acute coronary syndromes: A randomized serial optical coherence tomography study. Catheterization and Cardiovascular Interventions. 98(5). E677–E686.
16.
Dohi, Tomotaka, Hirohisa Endo, Shinichiro Doi, et al.. (2021). Comparison of clinical outcomes between percutaneous coronary intervention for de novo lesions versus in-stent restenosis lesions. Cardiovascular Intervention and Therapeutics. 37(2). 324–332.
17.
Dohi, Tomotaka, Iwao Okai, Shinya Okazaki, et al.. (2020). Angiographical coronary artery calcification predicts antegrade guidewire crossing during percutaneous coronary intervention of chronic total occlusion. Interventional Cardiology. 12(7). 209.
18.
Dohi, Tomotaka, Yoshiteru Kato, Hirohisa Endo, et al.. (2020). Long-term clinical outcomes and cause of death after endovascular treatment for femoropopliteal artery lesions. Journal of Cardiology. 77(4). 417–423.
19.
Endo, Hirohisa, Tomotaka Dohi, Hideki Wada, et al.. (2019). Clinical indicators and coronary angiographic features of expansive arterial remodelling in patients with abdominal aortic aneurysms. PLoS ONE. 14(7). e0219730–e0219730.
20.
Endo, Hirohisa, Tomotaka Dohi, Katsumi Miyauchi, et al.. (2019). Clinical impact of complex percutaneous coronary intervention in patients with coronary artery disease. Cardiovascular Intervention and Therapeutics. 35(3). 234–241.
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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