Ryan Callahan

55 papers and 374 indexed citations i.

About

Ryan Callahan is a scholar working on Epidemiology, Pulmonary and Respiratory Medicine and Cardiology and Cardiovascular Medicine. According to data from OpenAlex, Ryan Callahan has authored 55 papers receiving a total of 374 indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Epidemiology, 30 papers in Pulmonary and Respiratory Medicine and 25 papers in Cardiology and Cardiovascular Medicine. Recurrent topics in Ryan Callahan’s work include Congenital Heart Disease Studies (42 papers), Pulmonary Hypertension Research and Treatments (11 papers) and Mechanical Circulatory Support Devices (9 papers). Ryan Callahan is often cited by papers focused on Congenital Heart Disease Studies (42 papers), Pulmonary Hypertension Research and Treatments (11 papers) and Mechanical Circulatory Support Devices (9 papers). Ryan Callahan collaborates with scholars based in United States, Canada and Poland. Ryan Callahan's co-authors include Kathy J. Jenkins, Kimberlee Gauvreau, Christopher W. Baird, Christina M. Ireland, Audrey C. Marshall, Sara O. Vargas, Laureen Sena, Diego Porras, Jesse J. Esch and Philip T. Levy and has published in prestigious journals such as Proceedings of the Royal Society B Biological Sciences, The Journal of Pediatrics and American Heart Journal.

In The Last Decade

Co-authorship network of co-authors of Ryan Callahan i

Fields of papers citing papers by Ryan Callahan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Ryan Callahan

Since Specialization
Citations

This map shows the geographic impact of Ryan Callahan'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 Ryan Callahan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryan Callahan 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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2025