Author + information
- Received January 21, 2020
- Revision received May 1, 2020
- Accepted May 2, 2020
- Published online August 17, 2020.
- Dominic Millenaar, MDa,∗ (, )
- Tobias Fehlmann, MSb,
- Sean Scholz, MDa,
- Valérie Pavlicek, MDa,
- Alexander Flohr, BSb,
- Markus Dillmann, BSb,
- Michael Böhm, MDa,
- Andreas Keller, PhDb,
- Felix Mahfoud, MDa and
- Christian Ukena, MDa
- aKlinik für Innere Medizin III, Kardiologie, Angiologie und Internistische Intensivmedizin, Universitätsklinikum des Saarlandes, Homburg/Saar, Germany
- bZentrum für Bioinformatik Saar, Abteilung für klinische Bioinformatik, Universität des Saarlandes, Saarbrücken, Germany
- ↵∗Address for correspondence:
Dr. Dominic Millenaar, Department of Internal Medicine III, Cardiology, Angiology, Intensive Care Medicine, Saarland University Hospital, Kirrberger Strasse 1, IMED, building 41, 66421 Homburg/Saar, Germany.
Objectives This study sought to determine the quantity and quality of publications in AF research using large-scale scientometric data analyses.
Background Research in atrial fibrillation (AF) has increased over time. The increasing number of research papers makes it harder to identify relevant research work.
Methods All 21,603 publications from 1945 to 2018 were retrieved from Web of Science and analyzed regarding geographical distribution of scientific output and international research cooperation.
Results The total number of AF publications has significantly increased since the millennium change, from 3,063 (14.2%) in 1945 to 1999 to 18,540 (85.8%) publications in 2000 to 2018. AF research grew 10-fold compared with overall medical research since 1990 (ratio of AF publications to all publications: 0.02% (n = 99 of 410,701) in 1990 vs. 0.2% (n = 1,967 of 1,172,649) in 2018; p < 0.05). Quantitatively, the United States contributed 25.9% of AF research, followed by Japan (8.0%), Germany (7.8%), China (7.3%), and the United Kingdom (5.9%). In the all-time modified h-index, the United States ranked first (13.3% of all nations), followed by Canada (8.5%) and the United Kingdom (6.3%). In relation to population, Denmark was the best-rated nation, with the lowest number of inhabitants per publication (11,457), followed by Sweden (18,426) and the Netherlands (25,749), and per modified h-index (90,746), followed by Sweden (170,602) and the Netherlands (218,203). Measuring publications per research institute, Denmark again ranked first, with 19.2 publications per institute, followed by Italy (14.9) and Sweden (13.8). An intensive cooperation between nations was apparent.
Conclusions This study showed an increase in publication activity in AF research. The United States was the leading country in quantity of research efforts. Related to population and research institutes, Denmark ranked first.
Drs. Böhm and Mahfoud are supported by Deutsche Forschungsgemeinschaft (SFB TRR219). Dr. Mahfoud is supported by Deutsche Hochdruckliga and Deutsche Gesellschaft für Kardiologie. Dr. Millenaar has received honoraria from Bayer, Boston Scientific, and Daiichi-Sankyo. Dr. Scholz has received speaker honoraria from Pfizer. Dr. Pavlicek has received honoraria from Bayer. Dr. Böhm has received lecture honoraria and consulting fees from Amgen, Abbott, AstraZeneca, Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Medtronic, Novartis, Servier, and Vifor. Dr. Mahfoud has received scientific support and speaker honoraria from Medtronic and ReCor Medical. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
The authors attest they are in compliance with human studies committees and animal welfare regulations of the authors’ institutions and Food and Drug Administration guidelines, including patient consent where appropriate. For more information, visit the JACC: Clinical Electrophysiology author instructions page.
- Received January 21, 2020.
- Revision received May 1, 2020.
- Accepted May 2, 2020.
- 2020 American College of Cardiology Foundation
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