Charles Oprian

3.8k total citations · 1 hit paper
29 papers, 2.7k citations indexed

About

Charles Oprian is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Epidemiology. According to data from OpenAlex, Charles Oprian has authored 29 papers receiving a total of 2.7k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Cardiology and Cardiovascular Medicine, 10 papers in Surgery and 9 papers in Epidemiology. Recurrent topics in Charles Oprian's work include Cardiac Valve Diseases and Treatments (16 papers), Cardiac, Anesthesia and Surgical Outcomes (10 papers) and Infective Endocarditis Diagnosis and Management (8 papers). Charles Oprian is often cited by papers focused on Cardiac Valve Diseases and Treatments (16 papers), Cardiac, Anesthesia and Surgical Outcomes (10 papers) and Infective Endocarditis Diagnosis and Management (8 papers). Charles Oprian collaborates with scholars based in United States, Australia and Belgium. Charles Oprian's co-authors include William G. Henderson, Karl E. Hammermeister, Gulshan K. Sethi, Shahbudin H. Rahimtoola, Frederick L. Grover, Shukri F. Khuri, Jennifer Daley, Katherine S. Virgo, Walter E. Longo and Frank E. Johnson and has published in prestigious journals such as New England Journal of Medicine, Circulation and Journal of the American College of Cardiology.

In The Last Decade

Charles Oprian

28 papers receiving 2.6k 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.

Outcomes 15 years after valve replacement with a mechanical versus a bioprosthetic valve: final report of the Veterans Affairs randomized trial

2000 735 citations Karl E. Hammermeister, Gulshan K. Sethi 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
Charles Oprian United States	18	2.0k	1.3k	1.1k	848	290	29	2.7k
Alan H. Menkis Canada	31	1.0k 0.5×	1.7k 1.3×	366 0.3×	508 0.6×	69 0.2×	86	2.5k
Eric G. Butchart United Kingdom	27	2.8k 1.5×	1.5k 1.1×	1.8k 1.6×	1.4k 1.7×	95 0.3×	74	4.1k
Jan T. Christenson Switzerland	30	1.4k 0.7×	2.0k 1.5×	479 0.4×	656 0.8×	42 0.1×	153	2.9k
W.R. Eric Jamieson Canada	42	4.3k 2.2×	2.5k 1.9×	2.8k 2.5×	1.7k 2.0×	49 0.2×	140	5.4k
Moritz Seiffert Germany	28	1.8k 0.9×	858 0.7×	1.3k 1.2×	550 0.6×	66 0.2×	145	2.4k
J. Scott Rankin United States	34	3.5k 1.8×	2.0k 1.6×	2.0k 1.8×	1.1k 1.3×	83 0.3×	98	4.1k
Joanna Chikwe United States	37	3.6k 1.8×	2.5k 1.9×	1.8k 1.7×	1.3k 1.6×	107 0.4×	177	4.8k
Farzan Filsoufi United States	33	2.5k 1.3×	2.1k 1.6×	1.1k 1.0×	774 0.9×	59 0.2×	109	3.3k
Ibrahim Sultan United States	28	2.1k 1.1×	1.6k 1.2×	806 0.7×	1.4k 1.7×	86 0.3×	352	3.4k
Sandro Gelsomino Italy	31	2.0k 1.0×	1.2k 1.0×	605 0.5×	653 0.8×	66 0.2×	226	3.2k

Countries citing papers authored by Charles Oprian

Since Specialization

Citations

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

Fields of papers citing papers by Charles Oprian

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Charles Oprian

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

Margenthaler, Julie A., Walter E. Longo, Katherine S. Virgo, et al.. (2003). Risk Factors for Adverse Outcomes After the Surgical Treatment of Appendicitis in Adults. Annals of Surgery. 238(1). 59–66. 117 indexed citations

2.

Margenthaler, Julie A., Walter E. Longo, Katherine S. Virgo, et al.. (2003). . Annals of Surgery. 238(1). 59–66. 2 indexed citations

3.

Grossmann, Erik M., Walter E. Longo, Katherine S. Virgo, et al.. (2002). Morbidity and mortality of gastrectomy for cancer in Department of Veterans Affairs Medical Centers. Surgery. 131(5). 484–490. 57 indexed citations

4.

Hammermeister, Karl E., Gulshan K. Sethi, William G. Henderson, et al.. (2000). Outcomes 15 years after valve replacement with a mechanical versus a bioprosthetic valve: final report of the Veterans Affairs randomized trial. Journal of the American College of Cardiology. 36(4). 1152–1158. 735 indexed citations breakdown →

5.

Longo, Walter E., Katherine S. Virgo, Frank E. Johnson, et al.. (2000). Risk factors for morbidity and mortality after colectomy for colon cancer. Diseases of the Colon & Rectum. 43(1). 83–91. 336 indexed citations

6.

Harpole, David H., Malcolm M. DeCamp, Jennifer Daley, et al.. (1999). Prognostic models of thirty-day mortality and morbidity after major pulmonary resection. Journal of Thoracic and Cardiovascular Surgery. 117(5). 969–979. 210 indexed citations

7.

Grover, Frederick L., et al.. (1994). Determinants of the occurrence of and survival from prosthetic valve endocarditis. Journal of Thoracic and Cardiovascular Surgery. 108(2). 207–214. 48 indexed citations

8.

Grover, Frederick L., et al.. (1994). Determinants of the occurrence of and survival from prosthetic valve endocarditis. Journal of Thoracic and Cardiovascular Surgery. 108(2). 207–214. 74 indexed citations

9.

Hwang, Ming H., Cecil M. Burchfiel, Gautam Sethi, et al.. (1994). Comparison of the causes of late death following aortic and mitral valve replacement. VA Co-operative Study on Valvular Heart Disease.. PubMed. 3(1). 17–24. 17 indexed citations

10.

Grover, Frederick L., et al.. (1994). Determinants of the occurrence of and survival from prosthetic valve endocarditis. Experience of the Veterans Affairs Cooperative Study on Valvular Heart Disease.. PubMed. 108(2). 207–14. 92 indexed citations

11.

Hammermeister, Karl E., et al.. (1993). A Comparison of Outcomes in Men 11 Years after Heart-Valve Replacement with a Mechanical Valve or Bioprosthesis. New England Journal of Medicine. 328(18). 1289–1296. 302 indexed citations

12.

Sethi, Gulshan K., Karl E. Hammermeister, Shahbudin H. Rahimtoola, et al.. (1991). Predictors of primary bioprosthetic heart valve failure — Results from the VA randomized trial. Journal of the American College of Cardiology. 17(2). A363–A363. 3 indexed citations

13.

Hammermeister, Karl E., Charles Oprian, Kwan Hur, William G. Henderson, & Gulshan K. Sethi. (1991). Is associated disease or left ventricular dysfunction the more likely explanation for failure of valve replacement to improve survival in aortic regurgitation patients?. Journal of the American College of Cardiology. 17(2). A355–A355. 1 indexed citations

14.

Hammermeister, Karl E., Gulshan K. Sethi, Charles Oprian, & William G. Henderson. (1991). Comparison of occurrence of bleeding, systemic embolism, endocarditis, valve thrombosis and reoperation between patients randomized between a mechanical prosthesis and a bioprosthesis. Results from the VA randomized trial. Journal of the American College of Cardiology. 17(2). A362–A362. 11 indexed citations

15.

Sethi, Gulshan K., Karl E. Hammermeister, Charles Oprian, & William G. Henderson. (1991). Impact of resident training on postoperative morbidity in patients undergoing single valve replacement. Journal of Thoracic and Cardiovascular Surgery. 101(6). 1053–1059. 39 indexed citations

16.

Folland, Edward D., Charles Oprian, John C. Giacomini, et al.. (1989). Complications of cardiac catheterization and angiography in patients with valvular heart disease. Catheterization and Cardiovascular Diagnosis. 17(1). 15–21. 18 indexed citations

17.

Khuri, Shukri F., Edward D. Folland, Gulshan K. Sethi, et al.. (1988). Six month postoperative hemodynamics of the Hancock heterograft and the Björk-Shiley prosthesis: Results of a Veterans Administration Cooperative prospective randomized trial. Journal of the American College of Cardiology. 12(1). 8–18. 27 indexed citations

18.

Sethi, Gulshan K., D. Craig Miller, Julianne Souchek, et al.. (1987). Clinical, hemodynamic, and angiographic predictors of operative mortality in patients undergoing single valve replacement. Journal of Thoracic and Cardiovascular Surgery. 93(6). 884–897. 58 indexed citations

19.

Hammermeister, Karl E., William G. Henderson, Cecil M. Burchfiel, et al.. (1987). Comparison of outcome after valve replacement with a bioprosthesis versus a mechanical prosthesis: Initial 5 year results of a randomized trial. Journal of the American College of Cardiology. 10(4). 719–732. 69 indexed citations

20.

Oprian, Charles. (1970). On the exact power functions of some rank tests for the trend alternative /. OhioLink ETD Center (Ohio Library and Information Network).

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.

Explore authors with similar magnitude of impact