John O. Parker

7.7k total citations
115 papers, 5.5k citations indexed

About

John O. Parker is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Complementary and alternative medicine. According to data from OpenAlex, John O. Parker has authored 115 papers receiving a total of 5.5k indexed citations (citations by other indexed papers that have themselves been cited), including 93 papers in Cardiology and Cardiovascular Medicine, 24 papers in Surgery and 22 papers in Complementary and alternative medicine. Recurrent topics in John O. Parker's work include Cardiovascular Function and Risk Factors (33 papers), Cardiac electrophysiology and arrhythmias (23 papers) and Heart Rate Variability and Autonomic Control (23 papers). John O. Parker is often cited by papers focused on Cardiovascular Function and Risk Factors (33 papers), Cardiac electrophysiology and arrhythmias (23 papers) and Heart Rate Variability and Autonomic Control (23 papers). John O. Parker collaborates with scholars based in Canada, United States and United Kingdom. John O. Parker's co-authors include Roxroy O. West, Udho Thadani, Ho‐Leung Fung, John D. Parker, Salvatore Di Giorgi, Robert B. Case, Miguel A. Chiong, Bernice Farrell, Fareeduddin Khaja and Paul W. Armstrong and has published in prestigious journals such as New England Journal of Medicine, JAMA and Circulation.

In The Last Decade

John O. Parker

114 papers receiving 5.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John O. Parker Canada 41 4.1k 1.3k 1.2k 940 636 115 5.5k
P A Poole-Wilson United Kingdom 39 4.6k 1.1× 973 0.8× 1.5k 1.2× 583 0.6× 974 1.5× 78 6.7k
William B. Hood United States 40 3.8k 0.9× 1.4k 1.1× 880 0.7× 442 0.5× 303 0.5× 149 5.6k
Udho Thadani United States 34 3.1k 0.8× 876 0.7× 844 0.7× 626 0.7× 440 0.7× 172 4.5k
Henry J. Dargie United Kingdom 51 6.9k 1.7× 1.2k 1.0× 1.3k 1.1× 798 0.8× 441 0.7× 172 8.9k
T. Edward Cuddy Canada 18 6.1k 1.5× 745 0.6× 1.1k 0.9× 303 0.3× 462 0.7× 42 7.4k
Finn Waagstein Sweden 49 8.0k 2.0× 1.2k 1.0× 1.6k 1.3× 785 0.8× 599 0.9× 189 10.4k
Carlo Porcellati Italy 41 7.9k 1.9× 815 0.6× 1.6k 1.3× 587 0.6× 396 0.6× 90 9.5k
Michel F. Rousseau Belgium 39 4.2k 1.0× 930 0.7× 1.1k 1.0× 380 0.4× 341 0.5× 161 5.5k
Robert Zelis United States 51 5.8k 1.4× 830 0.6× 1.8k 1.5× 1.6k 1.7× 2.1k 3.4× 253 8.4k
David E. Johnstone Canada 33 4.5k 1.1× 975 0.8× 854 0.7× 331 0.4× 393 0.6× 90 5.9k

Countries citing papers authored by John O. Parker

Since Specialization
Citations

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

Fields of papers citing papers by John O. Parker

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John O. Parker

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

All Works

20 of 20 papers shown
1.
Parker, Barbara M, et al.. (2020). Methotrexate for Cornual Ectopic Pregnancy. Cureus. 12(8). e9642–e9642. 5 indexed citations
2.
Parker, John D. & John O. Parker. (2012). Stable Angina Pectoris: The Medical Management of Symptomatic Myocardial Ischemia. Canadian Journal of Cardiology. 28(2). S70–S80. 11 indexed citations
3.
Parker, John O.. (2004). Chronic Angina Pectoris: Inadequacies of Current Therapy. The American Journal of Geriatric Cardiology. 13(5). 261–266. 3 indexed citations
4.
Kenchaiah, Satish, Marc A. Pfeffer, Martin St. John Sutton, et al.. (2004). Effect of antecedent systemic hypertension on subsequent left ventricular dilation after acute myocardial infarction (from the Survival and Ventricular Enlargement trial). The American Journal of Cardiology. 94(1). 1–8. 33 indexed citations
5.
Parker, John D., et al.. (1998). Diuretic Therapy in Angina Pectoris: Effects on Nitrate Tolerance and Exercise Performance. The American Journal of Cardiology. 81(1). 41A–43A. 1 indexed citations
6.
Seshadri, Pieter A., John O. Parker, & Dana Tomalty. (1998). Congenital arteriovenous fistula of internal thoracic artery: Successfully managed by transcatheter embolization. Catheterization and Cardiovascular Diagnosis. 43(2). 198–200. 3 indexed citations
7.
Parker, John D., Bernice Farrell, & John O. Parker. (1996). The effect of hydralazine on nitroglycerin tolerance. Journal of the American College of Cardiology. 27(2). 132–132. 3 indexed citations
8.
Parker, John D., et al.. (1995). 964-15 Diuretic Therapy Improves Exercise Capacity in Patients with Angina but has no Effect on Nitrate Tolerance. Journal of the American College of Cardiology. 25(2). 221A–221A. 1 indexed citations
9.
Parker, John D., et al.. (1993). Effect of therapy with an angiotensin-converting enzyme inhibitor on hemodynamic and counterregulatory responses during continuous therapy with nitroglycerin. Journal of the American College of Cardiology. 21(6). 1445–1453. 45 indexed citations
10.
Parker, John O.. (1993). The effects of oral ibopamine in patients with mild heart failure — a double blind placebo controlled comparison to furosemide. International Journal of Cardiology. 40(3). 221–227. 35 indexed citations
11.
Saumarez, Richard C., John O. Parker, & A. John Camm. (1992). Geometrically accurate activation mapping of the atrioventricular node region during surgery. Journal of the American College of Cardiology. 19(3). 601–606. 17 indexed citations
12.
Parker, John O.. (1989). Nitrate tolerance in angina pectoris. Cardiovascular Drugs and Therapy. 2(6). 823–829. 13 indexed citations
13.
Pym, John, Peter Brown, Edward J.P. Charrette, John O. Parker, & Roxroy O. West. (1987). Gastroepiploic-coronary anastomosis. Journal of Thoracic and Cardiovascular Surgery. 94(2). 256–259. 173 indexed citations
14.
Parker, John O.. (1987). Nitrate tolerance. The American Journal of Cardiology. 60(15). H44–H48. 12 indexed citations
15.
Rechnitzer, P. A., David A. Cunningham, Carol Buck, et al.. (1983). Relation of exercise to the recurrence rate of myocardial infarction in men. The American Journal of Cardiology. 51(1). 65–69. 74 indexed citations
16.
Oldridge, Neil, John O. Parker, David A. Cunningham, et al.. (1981). Reasons for dropout from exercise programs in post-coronary patients. Medicine & Science in Sports & Exercise. 13(3). 164???168–164???168. 108 indexed citations
17.
Thadani, Udho, et al.. (1980). Subaortic annular left ventricular aneurysm: An unusual cause of aortic regurgitation. Catheterization and Cardiovascular Diagnosis. 6(3). 285–291. 6 indexed citations
18.
Thadani, Udho, et al.. (1978). Submitral Annular Left Ventricular Aneurysm—Unusual Echocardiographic and Angiographic Features. Catheterization and Cardiovascular Diagnosis. 4(2). 163–174. 4 indexed citations
19.
Khaja, Fareeduddin & John O. Parker. (1971). Right and left ventricular performance in chronic obstructive lung disease. American Heart Journal. 82(3). 319–327. 64 indexed citations
20.
Parker, John O., et al.. (1966). Selective coronary arteriography.. PubMed. 94(9). 425–30. 6 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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