Friedhelm Sayk

120 total papers · 2.5k total citations
62 papers, 1.5k citations indexed

About

Friedhelm Sayk is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Endocrine and Autonomic Systems. According to data from OpenAlex, Friedhelm Sayk has authored 62 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Cardiology and Cardiovascular Medicine, 15 papers in Surgery and 11 papers in Endocrine and Autonomic Systems. Recurrent topics in Friedhelm Sayk’s work include Heart Rate Variability and Autonomic Control (12 papers), Escherichia coli research studies (7 papers) and Viral gastroenteritis research and epidemiology (6 papers). Friedhelm Sayk is often cited by papers focused on Heart Rate Variability and Autonomic Control (12 papers), Escherichia coli research studies (7 papers) and Viral gastroenteritis research and epidemiology (6 papers). Friedhelm Sayk collaborates with scholars based in Germany, United Kingdom and United States. Friedhelm Sayk's co-authors include Christoph Dodt, Hendrik Lehnert, Peter Wellhöner, Alfred C. Feller, Stefan Krüger, Andreas Böhle, Hartwig Büttner, Daniel Droemann, Christoph R. Becker and J. Struck and has published in prestigious journals such as JAMA, Circulation and SHILAP Revista de lepidopterología.

In The Last Decade

Co-authorship network of co-authors of Friedhelm Sayk

This figure shows the co-authorship network connecting the top 25 collaborators of Friedhelm Sayk. A scholar is included among the top collaborators of Friedhelm Sayk 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 Friedhelm Sayk. Friedhelm Sayk is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

Friedhelm Sayk

58 papers receiving 1.4k citations

Fields of papers citing papers by Friedhelm Sayk

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Friedhelm Sayk

Since Specialization
Citations

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

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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2026