1
|
Deschka H, Sindermann J, Martens S, Welp H. The Role of Different Cannulation Strategies for Postcardiotomy Extracorporeal Membrane Oxygenation on Patients’ Outcome. Thorac Cardiovasc Surg 2023. [DOI: 10.1055/s-0043-1761645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Affiliation(s)
- H. Deschka
- Albert-Schweitzer-Campus 1, Münster, Deutschland
| | - J. Sindermann
- Universitätsklinikum Münster—UKM, Münster, Deutschland
| | - S. Martens
- Albert-Schweitzer-Campus 1, Münster, Deutschland
| | - H. Welp
- University Hospital Muenster, Münster, Deutschland
| |
Collapse
|
2
|
Lionberg A, Martens S, Kwak D, Cao D, Nijhawan K, Ahmed O. Abstract No. 31 Comparison of hybrid Angio-CT infused volume and conventional anatomic volume calculation on Y-90 radioembolization dosimetry. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
3
|
Kozmik T, Deschka H, Martens S, Scherer M, Rukosujew A, Goldstein F, Hoffmeier A. Early Results of Minimally Invasive Mitral Valve Repair through Upper Partial Sternotomy, 8 Years’ Single-Center Experience. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- T. Kozmik
- Universitätsklinikum Münster - UKM, Münster, Deutschland
| | - H. Deschka
- Albert-Schweitzer-Campus 1, Münster, Deutschland
| | - S. Martens
- Albert-Schweitzer-Campus 1, Münster, Deutschland
| | - M. Scherer
- University Hospital Muenster, Münster, Deutschland
| | - A. Rukosujew
- Universitätsklinik Münster - Klinik für Herzchirurgie Münster, Münster, Deutschland
| | - F. Goldstein
- University Hospital Münster - UKM, Münster, Deutschland
| | - A. Hoffmeier
- Klinik für Herzchirurgie Münster, Münster, Deutschland
| |
Collapse
|
4
|
Kozmik T, Dell'aquila AM, Wagner NM, Martens S, Scherer M, Rukosujew A, Hoffmeier A. Preliminary Results of Minimally Invasive Triple Valve Surgery through Upper Partial Sternotomy: A Nine-Year Single-Centre Experience. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
5
|
Tie H, Welp H, Martens S, Seiler M, Albers P, Müller KM, Li Z, Martens S. Impact of Cardiac Fibrosis and Collagens on Right Ventricular Failure and Acute Kidney Injury in Patients after Continuous-Flow Left Ventricular Assist Devices. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
6
|
Tie H, Welp H, Martens S, Sindermann J, Martens S. Calcium-Channel Blockers (Amlodipine) Therapy Is Associated with Improved Survival in Patients after Continuous-Flow Left Ventricular Assist Devices. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
7
|
Rukosujew A, Usai MV, Martens S, Ibrahim A, Shakaki M, Bruenen A, Dell'Aquila AM. [Present-day policy of surgical treatment for type A acute aortic dissection]. Angiol Sosud Khir 2020; 26:82-101. [PMID: 33063755 DOI: 10.33529/angio2020217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A surgical intervention for type A acute aortic dissection is the only effective method of treatment making it possible to prevent the development of life-threatening complications and to attain clinical recovery of the patient. Supracoronary replacement of the ascending aorta and the proximal portion of the aortic arch is considered to be the classical and most commonly used method of an open operative intervention. On the one hand, it is technically the simplest and shortest operation, and on the other, this surgical technique is often accompanied by long-term proximal and distal complications, and first of all those caused by a persistent false lumen. The accumulated surgical experience and contemporary operative techniques, as well as advances of intensive therapy in treatment of type A acute aortic dissection make it possible to currently perform more extensive primary resections in order to improve the remote results. Total aortic arch replacement, including the use of the 'frozen elephant trunk' technique leads to fast thrombosis of the false lumen, preventing progression of the disease of the thoracic aorta and promoting its positive remodelling. The article describes the perioperative therapeutic policy accepted and pursued in our medical facility, also presenting the authors' opinion on the role and place of the 'frozen elephant trunk' technique in rendering medical care for patients with type A acute aortic dissection.
Collapse
Affiliation(s)
- A Rukosujew
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - M V Usai
- Department of Vascular and Endovascular Surgery, University Hospital Muenster, Muenster, Germany
| | - S Martens
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - A Ibrahim
- Department of Vascular and Endovascular Surgery, University Hospital Muenster, Muenster, Germany
| | - M Shakaki
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - A Bruenen
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Muenster, Muenster, Germany
| | - A M Dell'Aquila
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| |
Collapse
|
8
|
Welp H, Dell'Aquila A, Hoffmeier A, Martens S, Scherer M. Medical and Economic Consideration Regarding Long Term Mechanical Left Ventricular Support. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
9
|
Motekallemi A, Usai M, Ibrahim A, Martens S, Oberhuber A, Dell 'Aquila A, Rukosujew A. Volume Changes of the True- and False-Lumen in the Descending Aorta after Frozen Elephant Trunk Implantation. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Peivandi A, Martens S, Motekallemi A, Martens S, Hoffmeier A. Integrating 3D Printing in Surgical Teaching: A Novel, Low-Cost Method for Prospective Cardiac Surgeons. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
11
|
Thielmann M, Wendt D, Slottosch I, Welp H, Martens S, Schiller W, Neuhäuser M, Wahlers T, Ruhparwar A, Liakopoulos O. Emergency Coronary Artery Bypass Grafting in Patients with Acute Coronary Syndromes following Primary PCI: A Current Report of the North–Rhine–Westphalia Surgical Myocardial Infarction Registry. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
12
|
Thielmann M, Wendt D, Slottosch I, Welp H, Martens S, Schiller W, Jakob H, Wahlers T, Ruhparwar A, Liakopoulos O. Impact of Preoperative Antiplatelet Therapy and Major Bleeding Complications after Emergency Coronary Artery Bypass Grafting in Patients with Acute Coronary Syndromes: A Current Report of the North-Rhine-Westphalia Surgical Myocardial Infarction Registry. Thorac Cardiovasc Surg 2020. [DOI: 10.1055/s-0040-1705439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
13
|
Martens S, Lefesvre P, Nicolle R, Biankin AV, Puleo F, Van Laethem JL, Rooman I. Different shades of pancreatic ductal adenocarcinoma, different paths towards precision therapeutic applications. Ann Oncol 2019; 30:1428-1436. [PMID: 31161208 DOI: 10.1093/annonc/mdz181] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023] Open
Abstract
BACKGROUND Different histological and molecular subtypes of pancreatic ductal adenocarcinoma (PDAC), with different molecular composition and survival statistics, have recently been recognised. MATERIALS AND METHODS This review describes the currently available studies regarding molecular and histological subtypes in PDAC. Studies from major cohorts such as International Cancer Genome Consortium as well as smaller cohorts are reviewed. We discuss where the described subtypes overlap, where the discrepancies are and which paths forward could be taken regarding diagnosis, ontogeny and therapy. RESULTS Four molecular subtypes with strong overlap among the different studies can be found, next to a list of mixed findings. Two of the four subtypes (epithelial classical and mesenchymal basal-like) were represented in every study and were often discriminated in other solid tumours as well. These two subtypes differ substantially in prognosis. One biomarker has been discovered, only discriminating these two subtypes, and insights into subtype-specific therapeutic vulnerabilities are scarce. CONCLUSION Subtypes can be reproducibly detected in cohorts of PDAC patients and two of them directly relate with prognosis. A consensus on the subtypes is warranted. Further discovery and validation studies are needed to identify strong biomarkers, to comprehend subtype ontogeny and to define strategies for precision medicine.
Collapse
Affiliation(s)
- S Martens
- Laboratory of Medical and Molecular Oncology, Vrije Universiteit Brussel, Brussels
| | - P Lefesvre
- Department of Pathology, UZ Brussel, Brussels, Belgium
| | - R Nicolle
- Programme Cartes d'Identité des Tumeurs (CIT), Ligue Nationale Contre Le Cancer, Paris, France
| | - A V Biankin
- Wolfson Wohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow; West of Scotland Pancreatic Unit, Glasgow Royal Infirmary, Glasgow, UK
| | - F Puleo
- Medical Oncology Department, Institut Jules Bordet; Laboratory of Experimental Gastroenterology
| | - J L Van Laethem
- Laboratory of Experimental Gastroenterology; Department of Gastroenterology and Digestive Oncology, Hospital Erasme, Université Libre de Bruxelles, Brussels, Belgium.
| | - I Rooman
- Laboratory of Medical and Molecular Oncology, Vrije Universiteit Brussel, Brussels.
| |
Collapse
|
14
|
Deschka H, Pogoda C, Martens S, Scherer M, Welp H. Long-Term Results of Calcineurin Inhibitor-Free Immunosuppression Using Everolimus after Heart Transplantation. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1679018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- H. Deschka
- Universitätsklinikum Münster, Department für Herz- und Thoraxchirurgie; Klinik für Herzchiruirgie, Münster, Germany
| | - C. Pogoda
- Department of Cardiology, Universitätsklinikum Münster, Münster, Germany
| | - S. Martens
- Universitätsklinikum Münster, Department für Herz- und Thoraxchirurgie; Klinik für Herzchiruirgie, Münster, Germany
| | - M. Scherer
- Universitätsklinikum Münster, Department für Herz- und Thoraxchirurgie; Klinik für Herzchiruirgie, Münster, Germany
| | - H. Welp
- Universitätsklinikum Münster, Department für Herz- und Thoraxchirurgie; Klinik für Herzchiruirgie, Münster, Germany
| |
Collapse
|
15
|
Wintgen L, Dakkak R, Wisniewski K, Nawrocki P, Martens S, Dell'Aquila M. Incidence, Dynamics, and Determinants of Acute Kidney Injury following CABG and Postoperative Coronary Angiogram: A Comprehensive Analysis of 242 Patients. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- L. Wintgen
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| | - R. Dakkak
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| | - K. Wisniewski
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| | - P. Nawrocki
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| | - S. Martens
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| | - M. Dell'Aquila
- University Hospital Muenster, Cardiac Surgery, Muenster, Germany
| |
Collapse
|
16
|
Deschka H, Schäfers B, Gottschalk A, Scherer M, Martens S, Welp H. The Effect of Different Cannulation Strategies for Extracorporeal Membrane Oxygenation Support in Postcardiotomy Patients. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- H. Deschka
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster, Klinik für Herzchiruirgie, Münster, Germany
| | - B. Schäfers
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster, Klinik für Herzchiruirgie, Münster, Germany
| | - A. Gottschalk
- Department of Anästhesiology and Pain medicine, Universitätsklinikum Münster, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster, Klinik für Herzchiruirgie, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster, Klinik für Herzchiruirgie, Münster, Germany
| | - H. Welp
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster, Klinik für Herzchiruirgie, Münster, Germany
| |
Collapse
|
17
|
Deschka H, Schäfers B, Gottschalk A, Scherer M, Martens S, Welp H. Effects of Levosimendan Therapy in Patients Undergoing Extracorporeal Membrane Oxygenation after Cardiac Surgery. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1679012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- H. Deschka
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster; Klinik für Herzchiruirgie, Münster, Germany
| | - B. Schäfers
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster; Klinik für Herzchiruirgie, Münster, Germany
| | - A. Gottschalk
- Department of Anästhesiology and Pain Medicine, Universitätsklinikum Münster, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster; Klinik für Herzchiruirgie, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster; Klinik für Herzchiruirgie, Münster, Germany
| | - H. Welp
- Department für Herz- und Thoraxchirurgie, Universitätsklinikum Münster; Klinik für Herzchiruirgie, Münster, Germany
| |
Collapse
|
18
|
Burghard A, Schakaki M, Hillebrand J, Hoffmeier A, Imam A, Martens S, Roth J, Austermann J. The Effect of Cardiopulmonary Bypass on the Monocytes’ Tolerance. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- A. Burghard
- Institute of Immunology, University Hospital Muenster, Muenster, Germany
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - M. Schakaki
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - J. Hillebrand
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - A. Hoffmeier
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - A. Imam
- Institute of Immunology, University Hospital Muenster, Muenster, Germany
| | - S. Martens
- Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - J. Roth
- Institute of Immunology, University Hospital Muenster, Muenster, Germany
| | - J. Austermann
- Institute of Immunology, University Hospital Muenster, Muenster, Germany
| |
Collapse
|
19
|
Martens S, Majewska-Pinda A, Benkmann A, Zentek J, Spolders M, Simon A, Schafft H, Steinhöfel O. Influence of soil contamination before and after ensiling on mineral composition of grass silages, feed intake and carry-over to body tissue of goats. J Anim Feed Sci 2018. [DOI: 10.22358/jafs/99863/2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
20
|
Shevelev AB, Isakova EP, Trubnikova EV, La Porta N, Martens S, Medvedeva OA, Trubnikov DV, Akbaev RM, Biryukova YK, Zylkova MV, Lebedeva AA, Smirnova MS, Deryabina YI. A study of antimicrobial activity of polyphenols derived from wood. Bulletin of RSMU 2018. [DOI: 10.24075/brsmu.2018.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Due to the spreading and increasing drug resistance of pathogens, the search for novel antibiotics is becoming ever more important. Plant-derived polyphenols are a vast and promising class of compounds with a potential to fight infectious diseases. Still, they are not routinely used in clinical practice. No reports on the in vivo studies of these compounds have been presented. The aim of our work was to compare the antimicrobial activity of resveratrol (stilbene), dihydroquercetin and dihydromyricetin (flavonols) extracted from the bark and wood of conifers against the dermatophytes Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans. Using the radial diffusion assay, we established that dihydroquercetin, resveratrol and dihydromyricetin exhibit high activity against S. aureus even at the smallest possible concentrations of 0.22, 0.15, and 0.15 mM, respectively. In contrast, the highest achievable concentrations of these compounds in the solutions (21.5, 15.5 and 15.0 mM for dihydroquercetin, resveratrol and dihydromyricetin, respectively) have no effect on the growth of P. aeruginosa and C. albicans. These findings suggest that polyphenols derived from conifers could have a potential to be used as a medicine for topical application to treat bacterial infections of the skin caused by S. aureus.
Collapse
Affiliation(s)
- A. B. Shevelev
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
| | - E. P. Isakova
- Bakh Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | | | - N. La Porta
- Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - S. Martens
- Fondazione Edmund Mach, San Michele all'Adige, Italy
| | | | - D. V. Trubnikov
- Prof. Ivanov Kursk State Agricultural Academy, Kursk, Russia
| | - R. M. Akbaev
- Skryabin Moscow State Academy of Veterinary Medicine and Biotechnology, Moscow, Russia
| | - Yu. K. Biryukova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, Moscow, Russia
| | - M. V. Zylkova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of Russian Academy of Sciences, Moscow, Russia
| | - A. A. Lebedeva
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow
| | - M. S. Smirnova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow
| | - Y. I. Deryabina
- Bakh Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow
| |
Collapse
|
21
|
Martens S, Matheis G, Wimmer-Greinecker G, Feuerbach J, Jakob A, Mierdl S, Moritz A. Heparin Coating of the Extracorporeal Circuit Combined with Leukocyte Filtration Reduces Coagulation Activity, Blood Loss and Blood Product Substitution. Int J Artif Organs 2018. [DOI: 10.1177/039139880102400709] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background Cardiopulmonary bypass is associated with activation of the coagulation cascade. Occasionally, this results in postoperative hemorrhage and consequently the need for blood products associated with increasing costs and risk of infection. Contact activation of the intrinsic coagulation pathway, and damage to cellular blood components with the release of proteolytic substances from neutrophil granulocytes have been linked to these coagulation disorders. Methods Eighteen routine CABG-patients were randomly assigned to totally heparin coated circuits (Bioline coating) combined with leukocyte filtration in a double blind protocol (group I), 34 patients served as controls (group II). Leukocyte filters were activated before release of the aortic crossclamp. Coagulation activity, postoperative blood loss, and substitution with blood products were assessed. Results Blood loss in the first 24h after surgery was significantly lower with combined application of heparin coating and leukocyte filters (group I) vs. controls (group II) (526±78ml vs. 786±88ml; p<0.05). Thrombin formation represented by prothrombin fragments 1+2 was significantly lower in group I vs. group II after declamping of the aorta (2.1±0.3nmol/L vs. 4.0±0.3nmol/L; p<0.05). Group I showed higher AT III plasma than group II (48.8±3.2% vs. 41.5±1.7%; p<0.05). Conclusions Leukocyte filtration during reperfusion in heparin coated cardiopulmonary bypass circuits is associated with lower coagulation activation, decreased blood loss and reduced transfusion of packed red cells in elective CABG patients.
Collapse
Affiliation(s)
- S. Martens
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - G. Matheis
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - G. Wimmer-Greinecker
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - J. Feuerbach
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - A. Jakob
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - S. Mierdl
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| | - A. Moritz
- Department of Thoracic and Cardiovascular Surgery, J.W. Goethe University, Frankfurt am Main - Germany
| |
Collapse
|
22
|
Sauer U, Borsdorf H, Dietrich P, Liebscher A, Möller I, Martens S, Möller F, Schlömer S, Schütze C. Application of open-path Fourier transform infrared spectroscopy for atmospheric monitoring of a CO 2 back-production experiment at the Ketzin pilot site (Germany). Environ Monit Assess 2018; 190:114. [PMID: 29396669 DOI: 10.1007/s10661-018-6488-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 01/22/2018] [Indexed: 06/07/2023]
Abstract
During a controlled "back-production experiment" in October 2014 at the Ketzin pilot site, formerly injected CO2 was retrieved from the storage formation and directly released to the atmosphere via a vent-off stack. Open-path Fourier transform infrared (OP FTIR) spectrometers, on-site meteorological parameter acquisition systems, and distributed CO2 point sensors monitored gas dispersion processes in the near-surface part of the atmospheric boundary layer. The test site provides a complex and challenging mosaic-like surface setting for atmospheric monitoring which can also be found at other storage sites. The main aims of the atmospheric monitoring of this experiment were (1) to quantify temporal and spatial variations in atmospheric CO2 concentrations around the emitting vent-off stack and (2) to test if and how atmospheric monitoring can cope with typical environmental and operational challenges. A low environmental risk was encountered during the whole CO2 back-production experiment. The study confirms that turbulent wind conditions favor atmospheric mixing processes and are responsible for rapid dilution of the released CO2 leading to decreased detectability at all sensors. In contrast, calm and extremely stable wind conditions (especially occurring during the night) caused an accumulation of gases in the near-ground atmospheric layer with the highest amplitudes in measured gas concentration. As an important benefit of OP FTIR spectroscopic measurements and their ability to detect multiple gas species simultaneously, emission sources could be identified to a much higher certainty. Moreover, even simulation models using simplified assumptions help to find suitable monitoring network designs and support data analysis for certain wind conditions in such a complex environment.
Collapse
Affiliation(s)
- Uta Sauer
- UFZ- Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318, Leipzig, Germany.
| | - H Borsdorf
- UFZ- Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318, Leipzig, Germany
| | - P Dietrich
- UFZ- Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318, Leipzig, Germany
- Eberhard-Karls-University of Tübingen, Hölderlinstraße 12, 72074, Tübingen, Germany
| | - A Liebscher
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - I Möller
- Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655, Hannover, Germany
| | - S Martens
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - F Möller
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - S Schlömer
- Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655, Hannover, Germany
| | - C Schütze
- UFZ- Helmholtz Centre for Environmental Research, Permoserstraße 15, 04318, Leipzig, Germany
| |
Collapse
|
23
|
Welp H, Sidermann J, Martens S, Gottschalk A, Scherer M. Anticoagulation with Argatroban in Patients Undergoing Extracorporal Life Support System Therapy. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- H. Welp
- Department für Herz- und Thoraxchirurgie, Klinik für Herzchiruirgie, Universitätsklinikum Münster, Münster, Germany
| | - J. Sidermann
- Department für Herz- und Thoraxchirurgie, Klinik für Herzchiruirgie, Universitätsklinikum Münster, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie, Klinik für Herzchiruirgie, Universitätsklinikum Münster, Münster, Germany
| | - A. Gottschalk
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Münster, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie, Klinik für Herzchiruirgie, Universitätsklinikum Münster, Münster, Germany
| |
Collapse
|
24
|
Hoffmeier A, Werner C, Sindermann J, Rukosujew A, Scherer M, Martens S, Welp H. Survival and Quality of Life after Cardiac Reoperations for Replacement of Infected Prosthetic Material. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A. Hoffmeier
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - C. Werner
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - J. Sindermann
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - A. Rukosujew
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| | - H. Welp
- Department für Herz- und Thoraxchirurgie, UK Münster, Klinik für Herzchirurgie, Münster, Germany
| |
Collapse
|
25
|
Dakkak A, Preußer M, Landwehrt J, Martens S, Dell'Aquila A. Indicators of Graft Related Failure after CABG: A Detailed Analysis of 168 Re-angiographies. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A. Dakkak
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - M. Preußer
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - J. Landwehrt
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - S. Martens
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| | - A. Dell'Aquila
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University Hospital Muenster, Muenster, Germany
| |
Collapse
|
26
|
Rukosujew A, Martens S. Technical aspects of using the 'Thoraflex TM Hybrid' prosthesis in acute type A aortic dissection. Angiol Sosud Khir 2018; 24:146-155. [PMID: 29688208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The most tried out, 'classical' technique of the operation in acute type A aortic dissection is supracoronary prosthetic repair of the ascending aorta and proximal portion of the aortic arch, as the simplest and fastest intervention. However, this technique is associated with late complications related primarily to formation of a persistent false lumen leading to formation of an aneurysm of the descending aorta. Total prosthetic repair of the aortic arch, including the 'frozen elephant trunk' technique, contributes to thrombosis of the false lumen and remodelling of the thoracic aorta. The article describes peculiarities of this technique illustrated by an example of implanting the 'ThoraflexTM Hybrid' prosthesis.
Collapse
Affiliation(s)
- A Rukosujew
- Muenster University Hospital, Muenster, Germany
| | - S Martens
- Muenster University Hospital, Muenster, Germany
| |
Collapse
|
27
|
Kokalova A, Dell'Aquila A, Avramovic N, Regesta T, Sindermann J, Wenning C, Martens S. Fluorine-18 Fluorodeoxyglucose Positron Emission Tomography / Computed Tomography for Improving Diagnosis of Prosthesis Valve Endocarditis: Preliminary Results of a Single-Center Experience. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A. Kokalova
- Department für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - A.M. Dell'Aquila
- Department für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - N. Avramovic
- Department of Nuclear Medicine, Universitätsklinikum Münster, Münster, Germany
| | - T. Regesta
- Division of Cardiac Surgery, San Martino University Hospital Genova, Genova, Italy
| | - J. Sindermann
- Department für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - C. Wenning
- Department of Nuclear Medicine, Universitätsklinikum Münster, Münster, Germany
| | - S. Martens
- Department für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| |
Collapse
|
28
|
Welp H, Dell'Aquila A, Martens S, Sindermann J, Scherer M, Deschka H. Extracorporeal Membrane Oxygenation (ECMO) Support to Patients Aged 70 Years or More after Cardiac Surgery. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- H. Welp
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - A. Dell'Aquila
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - J. Sindermann
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - H. Deschka
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| |
Collapse
|
29
|
Dakkak A, Preusser M, Mastrobuoni S, Landwehrt J, Martens S, Dell'Aquila A. Impact on Mid-term Survival of Early Repeated Coronary Angiogram for Perioperative Myocardial Ischemia Following CABG: A Case-Control Study. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A.R. Dakkak
- Department of Cardiothoracic Surgery, University Hospital Muenster, Germany, Muenster, Germany
| | - M. Preusser
- Department of Cardiothoracic Surgery, University Hospital Muenster, Germany, Muenster, Germany
| | | | - J. Landwehrt
- Department of Cardiothoracic Surgery, University Hospital Muenster, Germany, Muenster, Germany
| | - S. Martens
- Department of Cardiothoracic Surgery, University Hospital Muenster, Germany, Muenster, Germany
| | - A.M. Dell'Aquila
- Department of Cardiothoracic Surgery, University Hospital Muenster, Germany, Muenster, Germany
| |
Collapse
|
30
|
Welp H, Sindermann J, Martens S, Stelljes M, Scherer M. Bone Marrow Transplantation after Implantation of a Left Ventricular Assist Device. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- H. Welp
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - J. Sindermann
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - S. Martens
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - M. Stelljes
- Universitätsklinikum Münster, Medizinische Klinik A, Münster, Germany
| | - M. Scherer
- Department für Herz- und Thoraxchirurgie; Klinik für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| |
Collapse
|
31
|
Lück S, Malec E, Asfour B, Martens S, Sindermann J. Structural Alterations of RVOT/LVOT Patches and Conduits Used in Congenital Heart Surgery: A Histomorphological Study. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- S. Lück
- Department für Herz-Thorax-Chirurgie, Abteilung für Kinderherzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - E. Malec
- Department für Herz-Thorax-Chirurgie, Abteilung für Kinderherzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - B. Asfour
- Deutsches Kinderherzzentrum, Kinderherz- und Thoraxchirurgie, Sankt Augustin, Germany
| | - S. Martens
- Department für Herz-Thorax-Chirurgie, Abteilung für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| | - J. Sindermann
- Department für Herz-Thorax-Chirurgie, Abteilung für Herzchirurgie, Universitätsklinikum Münster, Münster, Germany
| |
Collapse
|
32
|
Abstract
Macroautophagy, hereafter autophagy, is a major degradation pathway in eukaryotic systems that allows the removal of large intracellular structures such as entire organelles or protein aggregates, thus contributing to the homeostasis of cells and tissues. Autophagy entails the de novo formation of an organelle termed autophagosome, where a cup-shaped structure called isolation membrane nucleates in proximity of a cytoplasmic cargo material. Upon elongation and closure of isolation membranes, the mature autophagosome delivers the sequestered cargo into the lysosomal system for degradation. Among the factors for autophagosome formation are the autophagy-related (Atg) proteins belonging to the Atg8 conjugation system. In this system, the ubiquitin-like Atg8 protein is conjugated to the membrane lipid phosphatidylethanolamine present in autophagosomal membranes. Atg8 can also be removed from membranes by Atg4-mediated deconjugation. Here, we describe in vitro systems that recapitulate the enzymatic reactions occurring in vivo by presenting expression and purification strategies for all the components of the Saccharomyces cerevisiae Atg8 conjugation system. We also present protocols for in vitro Atg8 conjugation and deconjugation reactions employing small and giant unilamellar vesicles.
Collapse
Affiliation(s)
- D Fracchiolla
- Max F. Perutz Laboratories, University of Vienna, Vienna Biocenter, Vienna, Austria
| | - B Zens
- Max F. Perutz Laboratories, University of Vienna, Vienna Biocenter, Vienna, Austria
| | - S Martens
- Max F. Perutz Laboratories, University of Vienna, Vienna Biocenter, Vienna, Austria.
| |
Collapse
|
33
|
Affiliation(s)
- A. Ziepke
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| | - S. Martens
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| | - H. Engel
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| |
Collapse
|
34
|
Affiliation(s)
- S Martens
- Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
| |
Collapse
|
35
|
Fischer AJ, Florian AR, Fischer D, Martens S, Breuckmann F. Ischaemic perforation of the free left ventricular wall covered by pericardial adhesion as an incidental finding in a patient presenting with acute cerebral ischaemia. Eur Heart J 2016; 37:1283. [PMID: 26494865 DOI: 10.1093/eurheartj/ehv535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A J Fischer
- Department of Cardiovascular Medicine, Division of Electrophysiology, University of Münster, Münster, Germany
| | - A R Florian
- Department of Cardiovascular Medicine, University of Mu¨nster, Mu¨nster, Germany
| | - D Fischer
- Department of Cardiothoracic Surgery, Division of Cardiac Surgery, University of Münster, Münster, Germany
| | - S Martens
- Department of Cardiothoracic Surgery, Division of Cardiac Surgery, University of Münster, Münster, Germany
| | - F Breuckmann
- Department of Cardiology, Arnsberg Medical Center, Stolte Ley 5, Arnsberg 59759, Germany
| |
Collapse
|
36
|
Dakkak A, Kracke M, Dell'Aquila A, Martens S, Hoffmeier A. ECLS Therapy in Adult Patients with Acute Cardiogenic Shock, Early Results. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
37
|
Deschka H, Beckmeyer H, Welp H, Martens S, Scherer M. Preconditioning with Levosimendan in Patients with Biventricular Dysfunction Undergoing Left Ventricular Assist Device Implantation. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
38
|
Welp H, Sindermann J, Martens S, Scherer M. Readmissions after Implantation of Continuous Flow Left Ventricular Assist Device. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
39
|
Welp H, Scherer M, Martens S, Sindermann J. Infections Occurring during Extracorporeal Membrane Oxygenation Use in Adult Patients for Postcardiotomy Heart Failure. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
40
|
Landwehrt J, Martens S, Hoffmeier A, Alles S, Scherer M, Dell'Aquila A. Cardiac Ischemic Complications Following Cardiac Surgery - Angiographic Findings and Predictors of In-hospital Mortality. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
41
|
Lueck S, Aebert H, Schmidt C, Hartmann W, Roessig C, Sandkoetter J, Martens S, Wiebe K. Emergent Surgery for Pleuropulmonary Blastoma. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
42
|
Visser EJW, Zhang Q, De Gruyter F, Martens S, Huber H. Shade affects responses to drought and flooding - acclimation to multiple stresses in bittersweet (Solanum dulcamara L.). Plant Biol (Stuttg) 2016; 18 Suppl 1:112-119. [PMID: 25581141 DOI: 10.1111/plb.12304] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 01/05/2015] [Indexed: 06/04/2023]
Abstract
Plants exposed to environmental stress often respond by a change in their phenotypic traits. These changes in trait expression may alleviate the negative effect of such stress factors. However, if multiple stresses are present, responses are likely to be less predictable and hence do not necessarily correlate to plant performance. This study tested if this expectation was true, by subjecting Solanum dulcamara plants to various simultaneous stress factors. Plants were grown in well-watered conditions, drought or flooding, and exposed to either full light or shade for 4 weeks. Shoot and root biomass, stem morphological parameters, such as height, number of nodes and length of stem internodes, and leaf traits like length, specific leaf area, chlorophyll content and stomatal conductance were determined. Both variation in light and in water availability typically caused slower growth, and resulted in distinct phenotypic changes in stem, leaf and root traits. However, effects of stresses on the expression of traits were not always additive. Instead, some combined stress responses (e.g. leaf size) appeared to be limited by physical or physiological constraints, whereas other responses were opposite to each other (e.g. root:shoot ratio), resulting in an intermediate phenotype in the combined stress treatment. These data suggest that in natural conditions, where combined stress factors are likely to be present, the optimal phenotype may not necessarily be expressed. Responses of plants to multiple stress factors may therefore not be associated with immediate advantages in terms of increased performance.
Collapse
Affiliation(s)
- E J W Visser
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Q Zhang
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - F De Gruyter
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - S Martens
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - H Huber
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, the Netherlands
| |
Collapse
|
43
|
Zarbock A, Kellum J, Van Aken H, Schmidt C, Martens S, Görlich D, Meersch M. Long-term effects of remote ischaemic preconditioning in high risk patients undergoing cardiac surgery: follow-up of a randomised clinical trial. Intensive Care Med Exp 2015. [PMCID: PMC4798055 DOI: 10.1186/2197-425x-3-s1-a411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
44
|
Tumati S, Martens S, Aleman A. Role of IGF-1 in predicting cognitive functioning of middle aged and older males. Exp Gerontol 2015. [DOI: 10.1016/j.exger.2015.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
45
|
Ortmann R, Martens S, Pasel C, Enke D, Fröba M, Bathen D. Adsorptive Entfernung von Inhalationsanästhetika aus der Gasphase. CHEM-ING-TECH 2015. [DOI: 10.1002/cite.201550054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
46
|
Martens S, Löber J, Engel H. Front propagation in channels with spatially modulated cross section. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 91:022902. [PMID: 25768565 DOI: 10.1103/physreve.91.022902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Indexed: 06/04/2023]
Abstract
Propagation of traveling fronts in a three-dimensional channel with spatially varying cross section is reduced to an equivalent one-dimensional reaction-diffusion-advection equation with boundary-induced advection term. Treating the advection term as a weak perturbation, an equation of motion for the front position is derived. We analyze channels whose cross sections vary periodically with L along the propagation direction of the front. Taking the Schlögl model as a representative example, we calculate analytically the nonlinear dependence of the front velocity on the ratio L/l where l denotes the intrinsic front width. In agreement with finite-element simulations of the three-dimensional reaction-diffusion dynamics, our theoretical results predicts boundary-induced propagation failure for a finite range of L/l values. In particular, the existence of the upper bound of L/l can be completely understood based on the linear eikonal equation. Last, we demonstrate that the front velocity is determined by the suppressed diffusivity of the reactants for L≪l.
Collapse
Affiliation(s)
- S Martens
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| | - J Löber
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| | - H Engel
- Institut für Theoretische Physik, Hardenbergstraße 36, EW 7-1, Technische Universität Berlin, 10623 Berlin, Germany
| |
Collapse
|
47
|
Schneider S, Dell'Aquila A, Deschka H, Martens S, Rukosujew A. Severe Hemolysis after Paravalvular Leak Closure of a Mitral Prosthesis with an Amplatzer Device. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
48
|
Lück S, Delis A, Minor T, Pliquett U, Martens S, Preuße C. Analysis of Ischemic Neonatal and Adult Myocardium by Bioelectrical Impedance Spectroscopy. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
49
|
Landwehrt J, Alles S, Stypmann J, Martens S, Dell'Aquila A. Predictors of Mortality and Prolonged Hospital Stay after Diagnosis of Perioperative Myocardial Infarction in Patients Undergoing Isolated Coronary Artery Bypass Crafting. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
50
|
Ghezelbash F, Pollari F, Fattouch K, Santarpino G, Schneider S, Speziale G, Deschka H, Fischlein T, Martens S, Concistrè G, Regesta T, Dell'Aquila A. Proximal Redo after Acute Type A Aortic Dissection: Early Results form a Multicenter Experience. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|