Ulrich Schäfer

17.5k total citations · 3 hit papers
278 papers, 8.5k citations indexed

About

Ulrich Schäfer is a scholar working on Cardiology and Cardiovascular Medicine, Epidemiology and Surgery. According to data from OpenAlex, Ulrich Schäfer has authored 278 papers receiving a total of 8.5k indexed citations (citations by other indexed papers that have themselves been cited), including 142 papers in Cardiology and Cardiovascular Medicine, 92 papers in Epidemiology and 67 papers in Surgery. Recurrent topics in Ulrich Schäfer's work include Cardiac Valve Diseases and Treatments (125 papers), Infective Endocarditis Diagnosis and Management (79 papers) and Cardiovascular Function and Risk Factors (29 papers). Ulrich Schäfer is often cited by papers focused on Cardiac Valve Diseases and Treatments (125 papers), Infective Endocarditis Diagnosis and Management (79 papers) and Cardiovascular Function and Risk Factors (29 papers). Ulrich Schäfer collaborates with scholars based in Germany, United States and Switzerland. Ulrich Schäfer's co-authors include Christian Frerker, Oliver Micke, Günther Maier, Rudolf Matusch, Gert Richardt, Stephan Pfriem, Christian Rübe, Karl T. Beer, Stephan Mose and H Frommhold and has published in prestigious journals such as Cell, The Lancet and JAMA.

In The Last Decade

Ulrich Schäfer

267 papers receiving 8.2k 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.

Erythropoietin to treat head and neck cancer patients with anaemia undergoing radiotherapy: randomised, double-blind, placebo-controlled trial

2003 930 citations Ulrich Schäfer et al. profile →
Percutaneous Mitral Valve Interventions in the Real World

2013 575 citations Francesco Maisano, Olaf Franzen et al. Journal of the American College of Cardiology profile →
Comparison of Balloon-Expandable vs Self-expandable Valves in Patients Undergoing Transcatheter Aortic Valve Replacement

2014 463 citations Christian Frerker, Ulrich Schäfer et al. profile →

Peers

Countries citing papers authored by Ulrich Schäfer

Since Specialization

Citations

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

Fields of papers citing papers by Ulrich Schäfer

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ulrich Schäfer

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Transcatheter Aortic Valve Implantation for Failed Surgical Aortic Bioprostheses Using a Self-Expanding Device (from the Prospective VIVA Post Market Study) 2020 ·The American Journal of Cardiology ·Ran Kornowski, Bernard Chevalier, Jean‐Philippe Verhoye, David Holzhey, Axel Harnath, Ulrich Schäfer, Emmanuel Teíger, Thibaut Manigold, Thomas Modine, Géraud Souteyrand, Didier Champagnac, Jae K. Oh, Shuzhen Li, Didier Tchétché	0
2	Transcatheter aortic valve implantation with the ACURATE neo valve: indications, procedural aspects and clinical outcomes 2020 ·EuroIntervention ·Won‐Keun Kim, Christian Hengstenberg, Michael Hilker, Ulrich Schäfer, Tanja K. Rudolph, Stefan Toggweiler, Andreas Rück, Lars Søndergaard, Lenard Conradi, Christian W. Hamm, Thomas Walther, Helge Möllmann, (unknown), (unknown), (unknown), (unknown), (unknown)	6
3	Novel Transcatheter Mitral Valve Prosthesis for Patients With Severe Mitral Annular Calcification 2019 ·Journal of the American College of Cardiology ·Paul Sorajja, Mario Gössl, Vasilis Babaliaros, David G. Rizik, Lenard Conradi, Richard Bae, Robert F. Burke, Ulrich Schäfer, John Lisko, Robert D. Riley, Robert A. Guyton, Nicolas Dumonteil, Pierre Berthoumieu, Didier Tchétché, Philipp Blanke, João L. Cavalcante, Benjamin Sun	57
4	Valve‐in‐valve‐in‐valve: Balloon expandable transcatheter heart valve in failing self‐expandable transcatheter heart valve in deteriorated surgical bioprosthesis 2018 ·Catheterization and Cardiovascular Interventions ·Andreas Schaefer, Florian Deuschl, Lenard Conradi, Ulrich Schäfer	2
5	Long-term outcome, survival and predictors of mortality after MitraClip therapy: Results from the German Transcatheter Mitral Valve Interventions (TRAMI) registry 2018 ·International Journal of Cardiology ·Daniel Kalbacher, Ulrich Schäfer, Ralph Stephan von Bardeleben, Holger Eggebrecht, Horst Sievert, Georg Nickenig, Christian Butter, Andreas E. May, Raffi Bekeredjian, Taoufik Ouarrak, Karl‐Heinz Kück, Björn Plicht, Ralf Zahn, Stephan Baldus, Hüseyin İnce, Wolfgang Schillinger, Peter Boekstegers, Jochen Senges, Edith Lubos	65
6	First‐in‐human implantation of a novel self‐expanding supra‐annular transcatheter heart valve for transcatheter aortic valve implantation inside a small degenerated aortic surgical bioprosthesis 2018 ·Catheterization and Cardiovascular Interventions ·Ulrich Schäfer, Daniel Kalbacher, Lisa Voigtländer, Lenard Conradi	5
7	Comparative analysis of balloon- versus mechanically-expandable transcatheter heart valves considering landing zone calcification 2018 ·Journal of Cardiology ·Niklas Schofer, Florian Deuschl, Gerhard Schön, Moritz Seiffert, Matthias Linder, Andreas Schaefer, Johannes Schirmer, Edith Lubos, Hermann Reichenspurner, Stefan Blankenberg, Lenard Conradi, Ulrich Schäfer	7
8	Direct percutaneous transaxillary implantation of a novel self‐expandable transcatheter heart valve for aortic stenosis 2017 ·Catheterization and Cardiovascular Interventions ·Florian Deuschl, Niklas Schofer, Moritz Seiffert, Samer Hakmi, Isamu Mizote, Andreas Schaefer, Johannes Schirmer, Hermann Reichenspurner, Stefan Blankenberg, Lenard Conradi, Ulrich Schäfer	13
9	Safety and efficacy of the percutaneous transaxillary access for transcatheter aortic valve implantation using various transcatheter heart valves in 100 consecutive patients 2017 ·International Journal of Cardiology ·Ulrich Schäfer, Florian Deuschl, Niklas Schofer, Christian Frerker, Tobias Schmidt, Karl‐Heinz Kück, Felix Kreidel, Johannes Schirmer, Isamu Mizote, H. Reichenspurner, Stefan Blankenberg, Hendrik Treede, Lenard Conradi	85
10	Impact of Preprocedural Left Ventricular Ejection Fraction on 1-Year Outcomes After MitraClip Implantation (from the ACCESS-EU Phase I, a Prospective, Multicenter, Nonrandomized Postapproval Study of the MitraClip Therapy in Europe) 2016 ·The American Journal of Cardiology ·Ulrich Schäfer, Francesco Maisano, Christian Butter, Olaf Franzen, Stephan Baldus, Jörg Hausleiter, Gian Paolo Ussia, Horst Sievert, Volker Geist, Julian D. Widder, Tiziano Moccetti, Wolfgang Schillinger	37
11	New Evidence for Favourable Effects on Haemodynamics and Ventricular Performance after Parachute® Implantation in Humans 2014 ·European Journal of Heart Failure ·Tobias Schmidt, Christian Frerker, Thomas Thielsen, (unknown), Peter Wohlmuth, Karl‐Heinz Kück, Ulrich Schäfer	12
12	TCT-692 Multicentre clinical study evaluating a novel resheatable self-expanding transcatheter aortic valve system 2014 ·Journal of the American College of Cardiology ·Ganesh Manoharan, Axel Linke, Helge Moellmann, Martyn Thomas, Ulrich Schäfer, Karl‐Heinz Kück, Stephen G. Worthley, Alexander Lauten, Gerhard Schymik, Ad J. van Boven, Christian Butter, Lars Søndergaard, Thomas Walther	1
13	Percutaneous Mitral Valve Interventions in the Real World breakdown → 2013 ·Journal of the American College of Cardiology ·Francesco Maisano, Olaf Franzen, Stephan Baldus, Ulrich Schäfer, Jörg Hausleiter, Christian Butter, Gian Paolo Ussia, Horst Sievert, Gert Richardt, Julian D. Widder, Tiziano Moccetti, Wolfgang Schillinger	575
14	Strahlentherapie bei schmerzhafter Kniegelenkarthrose (Gonarthrose) Ergebnisse einer deutschen Patterns-of-Care-Studie* 2010 ·Strahlentherapie und Onkologie ·Ralph Mücke, M. Heinrich Seegenschmiedt, Reinhard Heyd, Ulrich Schäfer, Franz‐Josef Prott, Michael Glatzel, Oliver Micke	6
15	Complementary and Alternative Medicine in Lung Cancer Patients: A Neglected Phenomenon? 2009 ·Frontiers of radiation therapy and oncology ·Oliver Micke, Jens Büntzel, Klaus Kisters, Ulrich Schäfer, Patrick Micke, Ralph Mücke	26
16	Recent progress in exploring the essentiality of the non-metallic ultratrace element arsenic to the nutrition of animals and man 2005 ·M. Anke, (unknown), Ulrich Schäfer	4
17	Recent progress on essentiality of the ultratrace element vanadium in the nutrition of animal and man 2005 ·M. Anke, (unknown), Ulrich Schäfer	12
18	Is there cause for concern about the environmental exposure of humans to manganese 2005 ·Journal of Elementology ·Ulrich Schäfer, (unknown)	1
19	Essentiality and toxicity of lithium 1997 ·Ulrich Schäfer	8
20	Oogenese und Spermatogenese 1978 ·Fischer eBooks ·Werner Kunz, Ulrich Schäfer	3

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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