John A. Callahan

2.3k total citations
49 papers, 1.5k citations indexed

About

John A. Callahan is a scholar working on Cardiology and Cardiovascular Medicine, Epidemiology and Surgery. According to data from OpenAlex, John A. Callahan has authored 49 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Cardiology and Cardiovascular Medicine, 12 papers in Epidemiology and 10 papers in Surgery. Recurrent topics in John A. Callahan's work include Pericarditis and Cardiac Tamponade (9 papers), Cardiac Valve Diseases and Treatments (8 papers) and Infective Endocarditis Diagnosis and Management (6 papers). John A. Callahan is often cited by papers focused on Pericarditis and Cardiac Tamponade (9 papers), Cardiac Valve Diseases and Treatments (8 papers) and Infective Endocarditis Diagnosis and Management (6 papers). John A. Callahan collaborates with scholars based in United States, United Kingdom and Vietnam. John A. Callahan's co-authors include A. Jamil Tajik, James B. Seward, Henry C. Pitot, J B Seward, Bijoy K. Khandheria, Larry K. Kvols, Patricia A. Pellikka, Guy S. Reeder, Clarence Shub and Thomas T. Schattenberg and has published in prestigious journals such as New England Journal of Medicine, JAMA and Circulation.

In The Last Decade

John A. Callahan

47 papers receiving 1.4k citations

Peers

John A. Callahan

CCM

EPIDE

NEURO

SURGE

PRM

K. Koppenhagen Germany

Marc Schwartz United States

Herbert E. Cohn United States

Sven Martens Germany

Jean Morin Canada

Brian C. Gulack United States

Peter C. Spittell United States

M. J. Raphael United Kingdom

S C Lennox United Kingdom

L Diethelm United States

K. Koppenhagen Germany

John A. Callahan

501 ×0.6

CCM

328 ×0.5

EPIDE

185 ×0.4

NEURO

260 ×0.6

SURGE

151 ×0.5

PRM

Citations per year, relative to John A. Callahan John A. Callahan (= 1×) peers K. Koppenhagen

Countries citing papers authored by John A. Callahan

Since Specialization

Citations

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

Fields of papers citing papers by John A. Callahan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John A. Callahan

This figure shows the co-authorship network connecting the top 25 collaborators of John A. Callahan. A scholar is included among the top collaborators of John A. Callahan 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 John A. Callahan. John A. Callahan 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

Warner, Daniel L., et al.. (2023). Reducing vertical bias and error in tidal marsh digital elevation models with machine learning and LiDAR derivatives. Estuarine Coastal and Shelf Science. 291. 108442–108442. 2 indexed citations

Firestone, Jeremy, et al.. (2014). Changing vessel routes could significantly reduce the cost of future offshore wind projects. Journal of Environmental Management. 141. 146–154. 23 indexed citations

Firestone, Jeremy, et al.. (2012). Delaware Marine Spatial Planning Offshore Wind Context. 1 indexed citations

Callahan, John A. & James B. Seward. (1997). Pericardiocentesis Guided by Two‐Dimensional Echocardiography. Echocardiography. 14(5). 497–504. 32 indexed citations

Son, Jacques A.M. van, Gordon K. Danielson, & John A. Callahan. (1993). Congenital absence of the pericardium: Displacement of the heart associated with tricuspid insufficiency. The Annals of Thoracic Surgery. 56(6). 1405–1406. 7 indexed citations

Callahan, John A.. (1988). Medical history and the cardiologist. International Journal of Cardiology. 19(1). 1–4. 3 indexed citations

Kopecky, Stephen L., John A. Callahan, A. Jamil Tajik, & James B. Seward. (1986). Percutaneous pericardial catheter drainage: Report of 42 consecutive cases. The American Journal of Cardiology. 58(7). 633–635. 86 indexed citations

Fyke, F. Earl, James B. Seward, William D. Edwards, et al.. (1985). Primary cardiac tumors: Experience with 30 consecutive patients since the introduction of two-dimensional echocardiography. Journal of the American College of Cardiology. 5(6). 1465–1473. 102 indexed citations

Callahan, John A., James B. Seward, & A. Jamil Tajik. (1985). Cardiac Tamponade: Pericardiocentesis Directed by Two-Dimensional Echocardiography. Mayo Clinic Proceedings. 60(5). 344–347. 49 indexed citations

10.

Shub, Clarence, James B. Seward, John A. Callahan, et al.. (1983). Sensitivity of two-dimensional echocardiography in the direct visualization of atrial septal defect utilizing the subcostal approach: Experience with 154 patients. Journal of the American College of Cardiology. 2(1). 127–135. 83 indexed citations

11.

Callahan, John A., James B. Seward, A. Jamil Tajik, et al.. (1983). Pericardiocentesis assisted by two-dimensional echocardiography. Journal of Thoracic and Cardiovascular Surgery. 85(6). 877–879. 61 indexed citations

12.

Callahan, John A., et al.. (1982). Echocardiographic features of carcinoid heart disease. The American Journal of Cardiology. 50(4). 762–768. 28 indexed citations

13.

Callahan, John A., et al.. (1981). Adult-onset familial infra-Hisian block. American Heart Journal. 102(3). 447–452. 3 indexed citations

14.

Cunha, Cláudio L. Pereira da, Enrico Giuliani, John A. Callahan, & James R. Pluth. (1980). Echophonocardiographic Findings in Patients With Prosthetic Heart Valve Malfunction. Mayo Clinic Proceedings. 55(4). 231–242. 30 indexed citations

15.

Callahan, John A., et al.. (1979). Historical development of concept of blood circulation. The American Journal of Cardiology. 43(5). 1026–1032. 11 indexed citations

16.

Vlietstra, R E, et al.. (1978). Prinzmetal’s Variant Angina—Response to Verapamil. Mayo Clinic Proceedings. 53(4). 256–259. 51 indexed citations

17.

Ritter, Donald G., et al.. (1969). Unusual hemodynamic findings of diagnostic value in a case of left atrial myxoma∗. The American Journal of Cardiology. 23(4). 592–596. 8 indexed citations

18.

Broadbent, James C., John A. Callahan, Owings W. Kincaid, & F. Henry Ellis. (1966). Congenital Deficiency of the Pericardium * *From the Mayo Clinic and Mayo Foundation: Section of Medicine (Drs. Broadbent and Callahan), of Roentgenology (Dr. Kincaid), and of Surgery (Dr. Ellis).. Diseases of the Chest. 50(3). 237–244. 23 indexed citations

19.

Osmundson, Philip J., et al.. (1958). MITRAL INSUFFICIENCY FROM RUPTURED CHORDAE TENDINEAE SIMULATING AORTIC STENOSIS. Mayo Clinic Proceedings. 33(9). 235–244.

20.

Ellis, F. Henry, John W. Kirklin, John A. Callahan, & Earl H. Wood. (1956). PATENT DUCTUS ARTERIOSUS WITH PULMONARY HYPERTENSION. Journal of Thoracic Surgery. 31(3). 268–285. 32 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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