Torsten Ryman

642 total citations
19 papers, 505 citations indexed

About

Torsten Ryman is a scholar working on Neurology, Physiology and Pharmacology. According to data from OpenAlex, Torsten Ryman has authored 19 papers receiving a total of 505 indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Neurology, 6 papers in Physiology and 3 papers in Pharmacology. Recurrent topics in Torsten Ryman's work include Intracranial Aneurysms: Treatment and Complications (7 papers), Traumatic Brain Injury and Neurovascular Disturbances (7 papers) and Nitric Oxide and Endothelin Effects (6 papers). Torsten Ryman is often cited by papers focused on Intracranial Aneurysms: Treatment and Complications (7 papers), Traumatic Brain Injury and Neurovascular Disturbances (7 papers) and Nitric Oxide and Endothelin Effects (6 papers). Torsten Ryman collaborates with scholars based in Sweden, Belgium and United States. Torsten Ryman's co-authors include Douglas G MacMahon, Bent Indredavik, Nils Wahlgren, Jacques De Keyser, Edward D. Högestätt, Peter M. Zygmunt, Karl‐Erik Andersson, Olof Beck, Lennart Brandt and L. Brandt and has published in prestigious journals such as Hypertension, Journal of Pharmacy and Pharmacology and Naunyn-Schmiedeberg s Archives of Pharmacology.

In The Last Decade

Torsten Ryman

19 papers receiving 467 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Torsten Ryman Sweden 12 170 162 109 81 70 19 505
A. Famulari Argentina 12 93 0.5× 84 0.5× 73 0.7× 167 2.1× 62 0.9× 24 479
Léo Berger Canada 10 185 1.1× 168 1.0× 62 0.6× 26 0.3× 77 1.1× 13 546
Cheng-Kuei Chang Taiwan 17 133 0.8× 65 0.4× 51 0.5× 156 1.9× 36 0.5× 31 774
О. А. Гребенчиков Russia 11 46 0.3× 122 0.8× 71 0.7× 44 0.5× 54 0.8× 85 648
H J Augustin Germany 7 37 0.2× 137 0.8× 171 1.6× 159 2.0× 29 0.4× 8 649
Altura Bm United States 10 27 0.2× 57 0.4× 69 0.6× 93 1.1× 71 1.0× 26 535
Ge Tan China 14 106 0.6× 96 0.6× 20 0.2× 27 0.3× 27 0.4× 36 534
Norbert Watzinger Austria 19 89 0.5× 43 0.3× 407 3.7× 91 1.1× 147 2.1× 49 970
Lloyd B. Witkin United States 5 37 0.2× 135 0.8× 54 0.5× 46 0.6× 47 0.7× 9 384

Countries citing papers authored by Torsten Ryman

Since Specialization
Citations

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

Fields of papers citing papers by Torsten Ryman

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Torsten Ryman

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

All Works

19 of 19 papers shown
1.
Petersson, Jesper, Torsten Ryman, & Edward D. Högestätt. (2000). Vasodilator effects of KRN2391, levcromakalim and 3-morpholino-sydnonimin in human pial and omental arteries. Naunyn-Schmiedeberg s Archives of Pharmacology. 362(1). 68–73. 5 indexed citations
2.
Landmark, Knud, et al.. (1995). Nitrendipine and mefruside in elderly hypertensives: effects on blood pressure, cardiac output, cerebral blood flow and metabolic parameters.. PubMed. 9(4). 281–5. 10 indexed citations
3.
Zygmunt, Peter M., Torsten Ryman, & Edward D. Högestätt. (1995). Regional differences in endothelium‐dependent relaxation in the rat: contribution of nitric oxide and nitric oxide‐independent mechanisms. Acta Physiologica Scandinavica. 155(3). 257–266. 65 indexed citations
4.
Wahlgren, Nils, Douglas G MacMahon, Jacques De Keyser, Bent Indredavik, & Torsten Ryman. (1994). Intravenous Nimodipine West European Stroke Trial (INWEST) of Nimodipine in the Treatment of Acute Ischaemic Stroke. Cerebrovascular Diseases. 4(3). 204–210. 199 indexed citations
5.
Ryman, Torsten, et al.. (1993). Effects of pinacidil on cerebral and mesenteric arteries ?influence of the endothelium. Naunyn-Schmiedeberg s Archives of Pharmacology. 348(3). 298–304. 13 indexed citations
6.
Petersson, Jesper, Torsten Ryman, & Edward D. Högestätt. (1993). Enhancement of depolarization‐induced contractions after endothelium denudation is not related to an impaired production of nitric oxide or prostacyclin in the rabbit basilar artery. Acta Physiologica Scandinavica. 149(4). 467–474. 5 indexed citations
7.
Brandt, Lennart, Hans Säveland, Bertil Romner, & Torsten Ryman. (1991). Does Nimodipine eliminate arterial hypertension as a prognostic risk factor in subarachnoid haemorrhage?. British Journal of Neurosurgery. 5(5). 485–489. 13 indexed citations
8.
Ryman, Torsten, L. Brandt, Karl‐Erik Andersson, & Pekka Mellergård. (1989). Regional and species differences in vascular reactivity to extracellular potassium. Acta Physiologica Scandinavica. 136(2). 151–159. 15 indexed citations
9.
Brandt, L., Karl‐Erik Andersson, B. Ljunggren, Hans Säveland, & Torsten Ryman. (1988). Cerebrovascular and Cerebral Effects of Nimodipine — an Update. Acta neurochirurgica. Supplementum. 45. 11–20. 17 indexed citations
10.
Säveland, Hans, Β. Sonesson, B. Ljunggren, Torsten Ryman, & L. Brandt. (1988). Does intravenous nimodipine treatment influence cognition in patients subjected to early aneurysm operation?. Acta Neurologica Scandinavica. 77(1). 54–59. 2 indexed citations
11.
Tettenborn, D, et al.. (1987). Survey of clinical experience with nimodipine in patients with subarachnoid hemorrhage. Neurosurgical Review. 10(2). 77–84. 7 indexed citations
12.
Ljunggren, Bengt, Lennart Brandt, Hans Säveland, et al.. (1987). Aneurysmal subarachnoid hemorrhage: Prevention of delayed ischemic dysfunction with intravenous nimodipine. Neurosurgical Review. 10(4). 255–263. 6 indexed citations
13.
Brandt, Lennart, Β. Sonesson, Stefan Zygmunt, et al.. (1987). Management of Ruptured Intracranial Aneurysm: A review. British Journal of Neurosurgery. 1(1). 9–32. 26 indexed citations
14.
Andersson, Karl‐Erik, Lennart Brandt, Bengt Hindfelt, & Torsten Ryman. (1986). Migraine Treatment with Calcium Channel Blockers. Acta Pharmacologica et Toxicologica. 58(S2). 161–167. 10 indexed citations
15.
Beck, Olof & Torsten Ryman. (1985). Quantification of nitrendipine in plasma by a capillary column gas chromatographic-mass spectrometric method. Journal of Chromatography B Biomedical Sciences and Applications. 337(2). 402–407. 20 indexed citations
16.
Hansson, L., et al.. (1983). Pharmacokinetic and pharmacodynamic parameters in patients treated with nitrendipine.. Hypertension. 5(4_pt_2). II25–8. 27 indexed citations
17.
Hansson, Lennart, et al.. (1982). Experience with Nitrendipine???A New Calcium Antagonist???in Hypertension. Journal of Cardiovascular Pharmacology. 4(Supplement 3). S387–S387. 26 indexed citations
18.
Ohlsson, A, et al.. (1980). Plasma and Brain Levels of Δ6‐THC and Seven Monooxygenated Metabolites Correlated to the Cataleptic Effect in the Mouse. Acta Pharmacologica et Toxicologica. 47(4). 308–317. 26 indexed citations
19.
Nordqvist, Marianne, et al.. (1979). More acidic metabolites of Δ1-tetrahydrocannabinol isolated from rabbit urine. Journal of Pharmacy and Pharmacology. 31(1). 238–243. 13 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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