Thomas Ryan

30.1k total citations · 4 hit papers
214 papers, 19.5k citations indexed

About

Thomas Ryan is a scholar working on Cardiology and Cardiovascular Medicine, Radiology, Nuclear Medicine and Imaging and Surgery. According to data from OpenAlex, Thomas Ryan has authored 214 papers receiving a total of 19.5k indexed citations (citations by other indexed papers that have themselves been cited), including 118 papers in Cardiology and Cardiovascular Medicine, 66 papers in Radiology, Nuclear Medicine and Imaging and 54 papers in Surgery. Recurrent topics in Thomas Ryan's work include Cardiac Imaging and Diagnostics (62 papers), Cardiovascular Function and Risk Factors (42 papers) and Cardiac, Anesthesia and Surgical Outcomes (36 papers). Thomas Ryan is often cited by papers focused on Cardiac Imaging and Diagnostics (62 papers), Cardiovascular Function and Risk Factors (42 papers) and Cardiac, Anesthesia and Surgical Outcomes (36 papers). Thomas Ryan collaborates with scholars based in United States, Ireland and Canada. Thomas Ryan's co-authors include Neil J. Weissman, Sanjiv Kaul, Mario S. Verani, Vasken Dilsizian, Warren K. Laskey, Alice K. Jacobs, Manuel D. Cerqueira, Dudley J. Pennell, John A. Rumberger and Vance G. Fowler and has published in prestigious journals such as New England Journal of Medicine, Circulation and Immunity.

In The Last Decade

Thomas Ryan

205 papers receiving 18.8k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Standardized Myocardial Segmentation and Nomenclature for Tomographic Imaging of the Heart

2002 5.4k citations Neil J. Weissman, Thomas Ryan et al. profile →
Proposed Modifications to the Duke Criteria for the Diagnosis of Infective Endocarditis

2000 2.9k citations Thomas Ryan et al. profile →
Standardized myocardial segmentation and nomenclature for tomographic imaging of the heart: A statement for healthcare professionals from the Cardiac Imaging Committee of the Council on Clinical Cardiology of the American Heart Association

2002 565 citations Neil J. Weissman, Thomas Ryan et al. profile →
Guidelines for perioperative cardiovascular evaluation for noncardiac surgery

1996 501 citations Bernard Chaitman, Thomas Ryan et al. Journal of the American College of Cardiology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Thomas Ryan United States	57	11.2k	8.1k	5.0k	4.9k	2.2k	214	19.5k
David A. Morrow United States	100	29.5k 2.6×	9.2k 1.1×	12.8k 2.6×	5.0k 1.0×	1.2k 0.6×	592	45.0k
Thomas M. Bashore United States	48	7.4k 0.7×	2.0k 0.2×	4.2k 0.8×	6.6k 1.4×	1.6k 0.7×	213	13.8k
Grover M. Hutchins United States	79	8.4k 0.7×	3.2k 0.4×	7.2k 1.4×	3.4k 0.7×	805 0.4×	417	20.5k
Patrizio Lancellotti Belgium	83	46.9k 4.2×	14.3k 1.8×	12.3k 2.5×	12.7k 2.6×	1.8k 0.8×	481	56.4k
Markku S. Nieminen Finland	81	23.4k 2.1×	2.3k 0.3×	8.0k 1.6×	4.0k 0.8×	318 0.1×	414	37.3k
Ernst Rietzschel Belgium	46	19.8k 1.8×	5.5k 0.7×	4.4k 0.9×	3.0k 0.6×	241 0.1×	125	25.4k
Arthur E. Weyman United States	74	21.5k 1.9×	7.1k 0.9×	5.5k 1.1×	5.1k 1.1×	230 0.1×	316	25.8k
Gerald Maurer Austria	75	10.7k 1.0×	3.6k 0.4×	5.3k 1.1×	3.6k 0.7×	229 0.1×	493	19.4k
Duane M. Ilstrup United States	95	5.0k 0.4×	2.1k 0.3×	14.8k 3.0×	8.5k 1.7×	683 0.3×	308	31.8k
Chirag R. Parikh United States	85	4.8k 0.4×	945 0.1×	6.5k 1.3×	4.4k 0.9×	917 0.4×	511	29.1k

Countries citing papers authored by Thomas Ryan

Since Specialization

Citations

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

Fields of papers citing papers by Thomas Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Thomas Ryan

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

1.

Wilson, Eve, et al.. (2025). Successful embolisation of a ruptured splenic artery aneurysm in a high-risk pregnancy. Obstetric Medicine. 1753495X251358949–1753495X251358949.

2.

Breen, Eamon P., Alhanouf I. Al-Harbi, Ashanty M. Melo, et al.. (2020). Innate Lymphocyte Th1 and Th17 Responses in Elderly Hospitalised Patients with Infection and Sepsis. Vaccines. 8(2). 311–311. 9 indexed citations

3.

Ryan, Thomas, et al.. (2019). Tramadol as an adjunct to intra‐articular local anaesthetic infiltration in knee arthroscopy: a systematic review and meta‐analysis. ANZ Journal of Surgery. 89(7-8). 827–832. 4 indexed citations

4.

Vlok, Ruan, et al.. (2018). Intra-articular Alpha-2 Agonists as an Adjunct to Local Anesthetic in Knee Arthroscopy: A Systematic Review and Meta-Analysis. The Journal of Knee Surgery. 32(2). 138–145. 4 indexed citations

5.

Ahmed, Bina, Thomas Ryan, Peter Ver Lee, et al.. (2018). RECENT TEMPORAL TRENDS AND SEX DIFFERENCES IN BLEEDING COMPLICATIONS AFTER CORONARY INTERVENTION: A REPORT FROM THE NORTHERN NEW ENGLAND CARDIOVASCULAR DISEASE STUDY GROUP. Journal of the American College of Cardiology. 71(11). A1185–A1185. 2 indexed citations

6.

Ryan, Thomas, et al.. (2017). Adjuncts to Local Anaesthetics in Total Knee Arthroplasty. Journal of Anesthesia & Critical Care Open Access. 7(6). 1 indexed citations

7.

Williams, Eric S., Jonathan L. Halperin, James A. Arrighi, et al.. (2016). 2016 ACC Lifelong Learning Competencies for General Cardiologists. Journal of the American College of Cardiology. 67(22). 2656–2695. 26 indexed citations

8.

Ryan, Thomas. (2016). Jesus – ‘Our Wisest and Dearest Friend’: Aquinas and Moral Transformation. New Blackfriars. 97(1071). 575–590. 1 indexed citations

9.

Conroy, Melissa J., J A Otegbayo, F Mulcahy, et al.. (2014). Circulating CD56^dim natural killer cells and CD56⁺ T cells that produce interferon‐γ or interleukin‐10 are expanded in asymptomatic, E antigen‐negative patients with persistent hepatitis B virus infection. Journal of Viral Hepatitis. 22(3). 335–345. 19 indexed citations

10.

Thavendiranathan, Paaladinesh, Shizhen Liu, Saurabh Datta, et al.. (2012). ACCURATE QUANTIFICATION OF CHRONIC MITRAL REGURGITATION BY AUTOMATED TRUE 3-D PROXIMAL ISOVELOCITY SURFACE AREA USING REAL-TIME VOLUME COLOR FLOW DOPPLER TRANSTHORACIC ECHOCARDIOGRAPHY: IN VITRO AND CLINICAL VALIDATION. Journal of the American College of Cardiology. 59(13). E1366–E1366. 2 indexed citations

11.

Mahabeleshwar, Ganapati H., Daiji Kawanami, Nikunj Sharma, et al.. (2011). The Myeloid Transcription Factor KLF2 Regulates the Host Response to Polymicrobial Infection and Endotoxic Shock. Immunity. 35(1). 146–146. 4 indexed citations

12.

Mahabeleshwar, Ganapati H., Daiji Kawanami, Nikunj Sharma, et al.. (2011). The Myeloid Transcription Factor KLF2 Regulates the Host Response to Polymicrobial Infection and Endotoxic Shock. Immunity. 34(5). 715–728. 111 indexed citations

13.

Ahmed, Bina, Winthrop D. Piper, David J. Malenka, et al.. (2009). Significantly Improved Vascular Complications Among Women Undergoing Percutaneous Coronary Intervention. Circulation Cardiovascular Interventions. 2(5). 423–429. 114 indexed citations

14.

Smith, William T., T. Bruce Ferguson, Thomas Ryan, Carolyn Landolfo, & Eric D. Peterson. (2004). Should coronary artery bypass graft surgery patients with mild or moderate aortic stenosis undergo concomitant aortic valve replacement?. Journal of the American College of Cardiology. 44(6). 1241–1247. 51 indexed citations

15.

Weyman, Arthur E., Ravin Davidoff, Julius M. Gardin, et al.. (2002). Echocardiographic evaluation of pulmonary artery pressure with clinical correlates in predominantly obese adults. Journal of the American Society of Echocardiography. 15(5). 454–462. 20 indexed citations

16.

Davis, Kathryn, Bernard Chaitman, Thomas Ryan, Vera Bittner, & John W. Kennedy. (1995). Comparison of 15-year survival for men and women after initial medical or surgical treatment for coronary artery disease: A CASS registry study. Journal of the American College of Cardiology. 25(5). 1000–1009. 139 indexed citations

17.

Ryan, Thomas. (1990). Optimizing Cache Performance.. Int. CMG Conference. 26–37. 1 indexed citations

18.

Broderick, Thomas M., Stephen G. Sawada, William F. Armstrong, et al.. (1990). Improvement in rest and exercise-induced wall motion abnormalities after coronary angioplasty: An exercise echocardiographic study. Journal of the American College of Cardiology. 15(3). 591–599. 43 indexed citations

19.

Presti, Charles F., Harvey Feigenbaum, William F. Armstrong, Thomas Ryan, & James C. Dillon. (1987). Digital two-dimensional echocardiographic imaging of the proximal left anterior descending coronary artery. The American Journal of Cardiology. 60(16). 1254–1259. 27 indexed citations

20.

Ryan, Thomas. (1973). Value Conflict in Elementary Schools in Hawaii.. Cancer. 116(5). 1291–7. 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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