Knut Bjørnstad

542 total citations
18 papers, 415 citations indexed

About

Knut Bjørnstad is a scholar working on Cardiology and Cardiovascular Medicine, Radiology, Nuclear Medicine and Imaging and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Knut Bjørnstad has authored 18 papers receiving a total of 415 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Cardiology and Cardiovascular Medicine, 8 papers in Radiology, Nuclear Medicine and Imaging and 4 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Knut Bjørnstad's work include Cardiovascular Function and Risk Factors (9 papers), Cardiac Imaging and Diagnostics (8 papers) and Cardiac Valve Diseases and Treatments (5 papers). Knut Bjørnstad is often cited by papers focused on Cardiovascular Function and Risk Factors (9 papers), Cardiac Imaging and Diagnostics (8 papers) and Cardiac Valve Diseases and Treatments (5 papers). Knut Bjørnstad collaborates with scholars based in Norway, Saudi Arabia and Sweden. Knut Bjørnstad's co-authors include Hans Torp, Asbjørn Støylen, Terje Skjærpe, Å. Heimdal, Harald Osmundsen, Bjørn Angelsen, Svend Aakhus, Harald Vik‐Mo, Rune Wiseth and Carlos M.G. Durán and has published in prestigious journals such as Biochemical Journal, American Heart Journal and The Annals of Thoracic Surgery.

In The Last Decade

Knut Bjørnstad

18 papers receiving 405 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Knut Bjørnstad Norway 9 270 149 69 63 62 18 415
Iris Schuster France 15 736 2.7× 177 1.2× 88 1.3× 37 0.6× 64 1.0× 29 972
Steven J. Lavine United States 8 230 0.9× 77 0.5× 78 1.1× 37 0.6× 71 1.1× 14 339
John F. Keefe United States 10 283 1.0× 81 0.5× 92 1.3× 47 0.7× 34 0.5× 14 410
Louis I. Fink United States 6 481 1.8× 60 0.4× 78 1.1× 72 1.1× 21 0.3× 6 660
Karl La Rosée Germany 11 346 1.3× 133 0.9× 56 0.8× 61 1.0× 36 0.6× 20 482
Gary L. Pellom United States 12 238 0.9× 80 0.5× 121 1.8× 49 0.8× 20 0.3× 24 428
László Csiba Hungary 11 163 0.6× 59 0.4× 23 0.3× 168 2.7× 107 1.7× 31 382
Gregory D. Tilton United States 8 397 1.5× 194 1.3× 98 1.4× 32 0.5× 42 0.7× 8 504
Gordon H. Templeton United States 12 228 0.8× 123 0.8× 52 0.8× 21 0.3× 10 0.2× 17 433
Pavlos K. Toutouzas Greece 8 650 2.4× 108 0.7× 80 1.2× 75 1.2× 28 0.5× 16 779

Countries citing papers authored by Knut Bjørnstad

Since Specialization
Citations

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

Fields of papers citing papers by Knut Bjørnstad

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Knut Bjørnstad

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

All Works

18 of 18 papers shown
1.
Langeland, Halvor, Daniel Bergum, Magnus Løberg, et al.. (2022). Characteristics of circulatory failure after out-of-hospital cardiac arrest: a prospective cohort study. Open Heart. 9(1). e001890–e001890. 6 indexed citations
2.
Langeland, Halvor, Daniel Bergum, Trond Nordseth, et al.. (2021). Circulatory trajectories after out-of-hospital cardiac arrest: a prospective cohort study. BMC Anesthesiology. 21(1). 219–219. 6 indexed citations
3.
Langeland, Halvor, Daniel Bergum, Magnus Løberg, et al.. (2018). Transitions Between Circulatory States After Out-of-Hospital Cardiac Arrest: Protocol for an Observational, Prospective Cohort Study. JMIR Research Protocols. 7(1). e17–e17. 7 indexed citations
4.
Bjørnstad, Knut, et al.. (2003). [Training effects on pain in rheumatoid arthritis].. PubMed. 123(11). 1508–10. 2 indexed citations
5.
Rabben, Stein Inge, Asbjørn Støylen, Stig A. Slørdahl, et al.. (2000). Semiautomatic contour detection in ultrasound M-mode images. Ultrasound in Medicine & Biology. 26(2). 287–296. 26 indexed citations
6.
Støylen, Asbjørn, Å. Heimdal, Knut Bjørnstad, et al.. (2000). Strain Rate Imaging by Ultrasonography in the Diagnosis of Coronary Artery Disease. Journal of the American Society of Echocardiography. 13(12). 1053–1064. 95 indexed citations
7.
Støylen, Asbjørn, Å. Heimdal, Knut Bjørnstad, Hans Torp, & Terje Skjærpe. (1999). Strain Rate Imaging by Ultrasound in the Diagnosis of Regional Dysfunction of the Left Ventricle. Echocardiography. 16(4). 321–329. 78 indexed citations
8.
Bjørnstad, Knut, Svend Aakhus, & Hans Torp. (1997). How does computer-assisted digital wall motion analysis influence observer agreement and diagnostic accuracy during stress echocardiography?. International journal of cardiac imaging. 13(2). 105–114. 9 indexed citations
9.
10.
Aadahl, Petter, et al.. (1996). The importance of transesophageal echocardiography during surgery of the thoracic aorta. European Journal of Vascular and Endovascular Surgery. 12(4). 401–406. 8 indexed citations
11.
Bjørnstad, Knut, et al.. (1996). Clinical and echocardiographic follow-up after aortic valve reconstruction with bovine or autologous pericardium. American Heart Journal. 132(6). 1173–1178. 9 indexed citations
12.
Ali, Md Liakat, S. Pravin Kumar, Knut Bjørnstad, & Carlos M.G. Durán. (1996). The Sheep as an Animal Model for Heart Valve Research. Cardiovascular Surgery. 4(4). 543–549. 3 indexed citations
13.
Bjørnstad, Knut, et al.. (1996). Evaluation of reference systems for quantitative wall motion analysis from three-dimensional endocardial surface reconstruction: an echocardiographic study in subjects with and without myocardial infarction.. PubMed. 10(4). 244–53. 8 indexed citations
14.
Aakhus, Svend, Knut Bjørnstad, & Liv Hatle. (1995). Cardiovascular response in patients with and without myocardial ischaemia during dobutamine echocardiography stress test for coronary artery disease. Clinical Physiology. 15(3). 249–263. 3 indexed citations
15.
Durán, Carlos M.G., Begonia Gometza, Naresh Kumar, Ricardo Gallo, & Knut Bjørnstad. (1995). From aortic cusp extension to valve replacement with stentless pericardium. The Annals of Thoracic Surgery. 60. S428–S432. 38 indexed citations
16.
Aakhus, Svend, Knut Bjørnstad, & Liv Hatle. (1994). Noninvasive study of left ventricular function and systemic haemodynamics during dipyridamole echocardiography stress test. Clinical Physiology. 14(5). 581–594. 4 indexed citations
17.
Juul, Roar, Svend Aakhus, Knut Bjørnstad, et al.. (1994). Calcitonin gene-related peptide (human α-CGRP) counteracts vasoconstriction in human subarachnoid haemorrhage. Neuroscience Letters. 170(1). 67–70. 48 indexed citations
18.

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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2026