John C. Spears

3.6k total citations · 1 hit paper
8 papers, 1.6k citations indexed

About

John C. Spears is a scholar working on Cardiology and Cardiovascular Medicine, Surgery and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, John C. Spears has authored 8 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Cardiology and Cardiovascular Medicine, 5 papers in Surgery and 2 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in John C. Spears's work include Cardiovascular Issues in Pregnancy (5 papers), Cardiac Structural Anomalies and Repair (5 papers) and Cardiac Arrhythmias and Treatments (3 papers). John C. Spears is often cited by papers focused on Cardiovascular Issues in Pregnancy (5 papers), Cardiac Structural Anomalies and Repair (5 papers) and Cardiac Arrhythmias and Treatments (3 papers). John C. Spears collaborates with scholars based in Canada and United States. John C. Spears's co-authors include Jack M. Colman, Mathew Sermer, Dan Farine, Kofi S. Amankwah, Samuel C. Siu, Jeffrey F. Smallhorn, Lise‐Andrée Mercier, Dylan A. Taylor, James W. Tam and Catherine Kells and has published in prestigious journals such as Circulation, Journal of the American College of Cardiology and Circulation Research.

In The Last Decade

John C. Spears

8 papers receiving 1.5k 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.

Prospective Multicenter Study of Pregnancy Outcomes in Women With Heart Disease

2001 829 citations Samuel C. Siu, Mathew Sermer et al. Circulation profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John C. Spears Canada	8	1.4k	1.0k	465	282	105	8	1.6k
Amber Khanna United States	14	1.2k 0.8×	382 0.4×	679 1.5×	714 2.5×	49 0.5×	42	1.4k
Daniel Tobler Switzerland	19	749 0.5×	417 0.4×	773 1.7×	440 1.6×	80 0.8×	64	1.1k
James D. Fett United States	22	2.0k 1.4×	1.7k 1.6×	58 0.1×	114 0.4×	21 0.2×	45	2.1k
Chizuko Kamiya Japan	17	634 0.4×	397 0.4×	105 0.2×	184 0.7×	11 0.1×	49	784
H A Fleming United Kingdom	17	333 0.2×	172 0.2×	103 0.2×	306 1.1×	37 0.4×	48	879
Benjamin Zeevi Israel	11	299 0.2×	139 0.1×	447 1.0×	268 1.0×	97 0.9×	36	594
Fabio V. Lima United States	14	449 0.3×	270 0.3×	68 0.1×	142 0.5×	28 0.3×	25	527
Thomas E. Fagan United States	17	284 0.2×	232 0.2×	431 0.9×	370 1.3×	144 1.4×	38	707
Padmini Varadarajan United States	21	1.5k 1.1×	392 0.4×	673 1.4×	548 1.9×	354 3.4×	76	1.7k
Peter R. Bream United States	13	182 0.1×	240 0.2×	180 0.4×	257 0.9×	131 1.2×	41	588

Countries citing papers authored by John C. Spears

Since Specialization

Citations

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

Fields of papers citing papers by John C. Spears

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of John C. Spears

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

8 of 8 papers shown

1.

Siu, Samuel C., Jack M. Colman, Jeffrey F. Smallhorn, et al.. (2002). Adverse Neonatal and Cardiac Outcomes Are More Common in Pregnant Women With Cardiac Disease. Circulation. 105(18). 2179–2184. 225 indexed citations

2.

Siu, Samuel C., Mathew Sermer, Jack M. Colman, et al.. (2002). Prospective Multicenter Study of Pregnancy Outcomes in Women With Heart Disease. Obstetrical & Gynecological Survey. 57(1). 3–4. 193 indexed citations

3.

Siu, Samuel C., Mathew Sermer, Jack M. Colman, et al.. (2001). Prospective Multicenter Study of Pregnancy Outcomes in Women With Heart Disease. Circulation. 104(5). 515–521. 829 indexed citations breakdown →

4.

Sermer, Mathew, David A. Harrison, Elizabeth Grigoriadis, et al.. (1997). Risk and Predictors for Pregnancy-Related Complications in Women With Heart Disease. Circulation. 96(9). 2789–2794. 196 indexed citations

5.

Siu, Samuel C., Matthew Sermer, David A Harrison, et al.. (1996). Risk and predictors for pregnancy-related complications in women with heart disease. Journal of the American College of Cardiology. 27(2). 43–43. 20 indexed citations

6.

Spears, John C.. (1975). The prevalence of allergic disease in young British-born schoolchildren of different ethnic origin. PubMed Central. 25(153). 282–285. 7 indexed citations

7.

Evans, John R., R. W. Gunton, R. Baker, Donald S. Beanlands, & John C. Spears. (1965). Use of Radioiodinated Fatty Acid for Photoscans of the Heart. Circulation Research. 16(1). 1–10. 87 indexed citations

8.

Gunton, R. W., John R. Evans, R. Baker, John C. Spears, & Donald S. Beanlands. (1965). Demonstration of myocardial infarction by photoscans of the heart in man. The American Journal of Cardiology. 16(4). 482–487. 21 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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