Ralf Köster

2.6k total citations
25 papers, 1.0k citations indexed

About

Ralf Köster is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Cardiology and Cardiovascular Medicine. According to data from OpenAlex, Ralf Köster has authored 25 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Surgery, 6 papers in Pulmonary and Respiratory Medicine and 5 papers in Cardiology and Cardiovascular Medicine. Recurrent topics in Ralf Köster's work include Coronary Interventions and Diagnostics (7 papers), Nitric Oxide and Endothelin Effects (4 papers) and Cardiac Imaging and Diagnostics (4 papers). Ralf Köster is often cited by papers focused on Coronary Interventions and Diagnostics (7 papers), Nitric Oxide and Endothelin Effects (4 papers) and Cardiac Imaging and Diagnostics (4 papers). Ralf Köster collaborates with scholars based in Germany, Netherlands and United States. Ralf Köster's co-authors include Thomas Meinertz, Jan Kähler, Stephan Baldus, Dieter Vieluf, M. Sommerauer, C Hamm, Margret Kiehn, Thomas Münzel, Clemens Mittmann and Martin Paul and has published in prestigious journals such as The Lancet, Circulation and Journal of the American College of Cardiology.

In The Last Decade

Ralf Köster

23 papers receiving 989 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ralf Köster Germany 11 392 370 200 187 123 25 1.0k
Eric Chong Singapore 21 342 0.9× 607 1.6× 161 0.8× 206 1.1× 31 0.3× 47 1.8k
Ming‐Jer Hsieh Taiwan 18 374 1.0× 456 1.2× 91 0.5× 143 0.8× 32 0.3× 85 1.2k
Hiroshi Nakajima Japan 16 262 0.7× 347 0.9× 227 1.1× 311 1.7× 11 0.1× 53 1.5k
Sheng Liu China 19 312 0.8× 108 0.3× 75 0.4× 492 2.6× 35 0.3× 191 1.6k
Lakshmana Pendyala United States 22 740 1.9× 749 2.0× 70 0.3× 346 1.9× 18 0.1× 65 1.3k
Toshihiko Nishioka Japan 24 804 2.1× 998 2.7× 119 0.6× 442 2.4× 158 1.3× 77 2.1k
A.J. Mortimer United Kingdom 17 267 0.7× 206 0.6× 63 0.3× 383 2.0× 105 0.9× 40 1.3k
Monika Pávková Goldbergová Czechia 18 122 0.3× 304 0.8× 46 0.2× 37 0.2× 89 0.7× 81 974
S. Sheehan Ireland 15 257 0.7× 208 0.6× 86 0.4× 346 1.9× 30 0.2× 51 808
Keiji Oi Japan 14 290 0.7× 389 1.1× 199 1.0× 400 2.1× 17 0.1× 52 1.2k

Countries citing papers authored by Ralf Köster

Since Specialization
Citations

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

Fields of papers citing papers by Ralf Köster

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ralf Köster

This figure shows the co-authorship network connecting the top 25 collaborators of Ralf Köster. A scholar is included among the top collaborators of Ralf Köster 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 Ralf Köster. Ralf Köster 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.
Köster, Ralf, Johan Bussink, Lara Barazzuol, et al.. (2025). Development and validation of cost-effective multi-sample hypoxia chambers for proton ultra-high dose rate organoid irradiations. Clinical and Translational Radiation Oncology. 53. 100970–100970.
2.
Werdan, Karl, Stefan Perings, Ralf Köster, et al.. (2016). Effectiveness of Ivabradine Treatment in Different Subpopulations with Stable Angina in Clinical Practice: A Pooled Analysis of Observational Studies. Cardiology. 135(3). 141–150. 12 indexed citations
3.
Rudolph, Volker, Thomas Hofmann, Christian W. Hamm, et al.. (2014). Predictors of recurrent stroke after percutaneous closure of patent foramen ovale. EuroIntervention. 9(12). 1418–1422. 10 indexed citations
4.
Rudolph, Tanja K., Anna Klinke, Britta Goldmann, et al.. (2013). Liberation of vessel-adherent myeloperoxidase reflects plaque burden in patients with stable coronary artery disease. Atherosclerosis. 231(2). 354–358. 10 indexed citations
5.
Köster, Ralf, Jan Kaehler, & Thomas Meinertz. (2009). Treatment of stable angina pectoris by ivabradine in every day practice: The REDUCTION Study. American Heart Journal. 158(4). e51–e57. 29 indexed citations
6.
Mortensen, Kai, Tim Risius, Muhammet Ali Aydin, et al.. (2008). Biphasic versus Monophasic Shock for External Cardioversion of Atrial Flutter. Cardiology. 111(1). 57–62. 8 indexed citations
7.
Baldus, Stephan, Kai Müllerleile, Daniel Steven, et al.. (2006). Inhibition of xanthine oxidase improves myocardial contractility in patients with ischemic cardiomyopathy. Free Radical Biology and Medicine. 41(8). 1282–1288. 53 indexed citations
8.
Yamamura, Jin, et al.. (2006). Experimental 16-Row CT Evaluation of In-Stent Restenosis using New Stationary and Moving Cardiac Stent Phantoms: Experimental Examination. RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 178(11). 1079–1085. 1 indexed citations
9.
Baldus, Stephan, Ralf Köster, Phillip Chumley, et al.. (2005). Oxypurinol improves coronary and peripheral endothelial function in patients with coronary artery disease. Free Radical Biology and Medicine. 39(9). 1184–1190. 83 indexed citations
10.
Münzel, Thomas, et al.. (2003). Peptide-treated stent graft for the treatment of saphenous vein graft lesions: first clinical results.. PubMed. 15(10). 557–60. 4 indexed citations
11.
Schächinger, Volker, Christian W. Hamm, Thomas Münzel, et al.. (2003). A randomized trial of polytetrafluoroethylene-membrane-covered stents compared with conventional stents in aortocoronary saphenous vein grafts. Journal of the American College of Cardiology. 42(8). 1360–1369. 70 indexed citations
12.
Baldus, Stephan, Ralf Köster, R. Küchler, et al.. (2002). Perkutane Revaskularisation der koronaren Mehrgefäßerkrankung nach Einführung von Stents. DMW - Deutsche Medizinische Wochenschrift. 127(11). 547–552. 2 indexed citations
13.
Kähler, Jan, Clemens Mittmann, Ralf Köster, et al.. (2001). Oxidative Stress Increases Endothelin-1 Synthesis in Human Coronary Artery Smooth Muscle Cells. Journal of Cardiovascular Pharmacology. 38(1). 49–57. 135 indexed citations
14.
Köster, Ralf, et al.. (2001). Allergy in coronary in-stent restenosis. The Lancet. 357(9263). 1206–1207. 3 indexed citations
15.
Köster, Ralf, Dieter Vieluf, Margret Kiehn, et al.. (2000). Nickel and molybdenum contact allergies in patients with coronary in-stent restenosis. The Lancet. 356(9245). 1895–1897. 392 indexed citations
16.
Kähler, Jan, Hans‐Dieter Orzechowski, Clemens Mittmann, et al.. (2000). Oxidative Stress Increases Synthesis of Big Endothelin-1 by Activation of the Endothelin-1 Promoter. Journal of Molecular and Cellular Cardiology. 32(8). 1429–1437. 126 indexed citations
17.
Sievert, H., Carlos Macaya, E. Fleck, et al.. (1998). Laser angioplasty for within stent restenosis — final results of the LARS surveillance study. Journal of the American College of Cardiology. 31. 143–143. 2 indexed citations
18.
Kähler, Jan, et al.. (1997). Endotheline bei kardiovaskulären Erkrankungen (Endothelins in cardiovascular disease). Zeitschrift für Kardiologie. 86(6). 406–416. 2 indexed citations
19.
Kähler, Jan, Stephan Baldus, Ralf Köster, et al.. (1996). Captopril reduces endothelin-1 release from human umbilical vein endothelial cells by reduction of angiotensin II synthesis. Journal of the American College of Cardiology. 27(2). 104–104. 1 indexed citations
20.
Šrámek, Martin, et al.. (1990). [Criteria for differential diagnosis in cardial symptoms; left- or right-sided chest pain?].. PubMed. 134(46). 2249–52. 2 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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