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Hanke T, Hoffmann B, Lass M, Hess A, Reppel M, Stahl F, Pillay T, Neves P. LIVE Procedure - A Bespoke Technique for Ischemic Heart Failure. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1131] [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: 10/18/2022] Open
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Schermer M, Tsvelodub S, Vulevic V, Laß M, Hanke T. First Results of a Surgical Standalone Left Atrial Appendage Management Program in Germany. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725818] [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]
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Tsvelodub S, Schermer M, Trulley I, Melzer S, Sparr D, Laß M, Hanke T. Continuous Antegrade Heart Perfusion during Ascending Aorta and Aortic Arch Replacement in Patients with Aortic Aneurysm or Acute Aortic Dissections. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725782] [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]
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Schermer M, Tsvelodub S, Vulevic V, Laß M, Hanke T. First Preliminary Results of a New Hybrid Approach to Treat Persistent Atrial Fibrillation: The Convergent Procedure Together with Left Atrial Appendage Electrical Isolation/Closure. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725820] [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]
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Rößler S, Unbehau R, Gemming T, Kruppke B, Wiesmann HP, Hanke T. Calcite incorporated in silica/collagen xerogels mediates calcium release and enhances osteoblast proliferation and differentiation. Sci Rep 2020; 10:118. [PMID: 31924823 PMCID: PMC6954176 DOI: 10.1038/s41598-019-56023-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/05/2019] [Indexed: 11/13/2022] Open
Abstract
Multiphasic silica/collagen xerogels are biomaterials designed for bone regeneration. Biphasic silica/collagen xerogels (B30) and triphasic xerogels (B30H20 or B30CK20) additionally containing hydroxyapatite or calcite were demonstrated to exhibit several structural levels. On the first level, low fibrillar collagen serves as template for silica nanoparticle agglomerates. On second level, this silica-enriched matrix phase is fiber-reinforced by collagen fibrils. In case of hydroxyapatite incorporation in B30H20, resulting xerogels exhibit a hydroxyapatite-enriched phase consisting of hydroxyapatite particle agglomerates next to silica and low fibrillar collagen. Calcite in B30CK20 is incorporated as single non-agglomerated crystal into the silica/collagen matrix phase with embedded collagen fibrils. Both the structure of multiphasic xerogels and the manner of hydroxyapatite or calcite incorporation have an influence on the release of calcium from the xerogels. B30CK20 released a significantly higher amount of calcium into a calcium-free solution over a three-week period than B30H20. In calcium containing incubation media, all xerogels caused a decrease in calcium concentration as a result of their bioactivity, which was superimposed by the calcium release for B30CK20 and B30H20. Proliferation of human bone marrow stromal cells in direct contact to the materials was enhanced on B30CK20 compared to cells on both plain B30 and B30H20.
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Affiliation(s)
- S Rößler
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069, Dresden, Germany.
| | - R Unbehau
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069, Dresden, Germany
- Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Postfach 1160, D-21494, Geesthacht, Germany
| | - T Gemming
- IFW Dresden, P.O. Box 270116, D-01171, Dresden, Germany
| | - B Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069, Dresden, Germany
| | - H-P Wiesmann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069, Dresden, Germany
| | - T Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069, Dresden, Germany
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Heinemann C, Brünler R, Kreschel C, Kruppke B, Bernhardt R, Aibibu D, Cherif C, Wiesmann HP, Hanke T. Bioinspired calcium phosphate mineralization on Net-Shape-Nonwoven chitosan scaffolds stimulates human bone marrow stromal cell differentiation. ACTA ACUST UNITED AC 2019; 14:045017. [PMID: 31170696 DOI: 10.1088/1748-605x/ab27a4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Chitosan fibers were processed using the Net-Shape-Nonwoven (NSN) technique in order to create porous scaffolds which were functionalized in two bioinspired ways: collagen type I coating and unique mineralization with organically modified hydroxyapatite (ormoHAP). While collagen is common to enhance cell attachment on surfaces, the electric-field assisted migration and deposition of ormoHAP on the surface of the NSN-scaffolds is a novel technique which enables sub-micrometer sized mineralization while maintaining the original pore structure. Microscopy revealed fast attachment and morphological adaptation of the cells on both, the pure and the functionalized NSN-scaffolds. Remarkably, the cell number of osteogenically induced hBMSC on ormoHAP-modified NSN-scaffolds increased 3.5-5 fold compared to pure NSN-scaffolds. Osteogenic differentiation of hBMSC/osteoblasts was highest on collagen-functionalized NSN-scaffolds. RT-PCR studies revealed gene expression of ALP, BSP II, and osteocalcin to be high for all NSN-scaffolds. Overall, the NSN-scaffold functionalization with collagen and ormoHAP improved attachment, proliferation, and differentiation of hBMSC and therefore revealed the remarkable potential of their application for the tissue engineering of bone.
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Affiliation(s)
- C Heinemann
- Institute of Materials Science, Max Bergmann Center of Biomaterials, Technische Universität Dresden, Budapester Str. 27, D-01069, Germany
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Mohamed Y, Hanke T. Innovative HIV-1-specific CD8+ T-cell epitopes revealed in human recipients of conserved-proteome T-cell vaccine. J Infect Public Health 2019. [DOI: 10.1016/j.jiph.2018.10.129] [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: 10/27/2022] Open
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Rößler S, Heinemann C, Kruppke B, Wagner AS, Wenisch S, Wiesmann HP, Hanke T. Manipulation of osteoclastogenesis: Bioactive multiphasic silica/collagen composites and their effects of surface and degradation products. Mater Sci Eng C Mater Biol Appl 2018; 93:265-276. [PMID: 30274058 DOI: 10.1016/j.msec.2018.07.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 05/12/2018] [Accepted: 07/19/2018] [Indexed: 10/28/2022]
Abstract
The intent of the present study was to demonstrate that multiphasic silica/collagen xerogels are able to manipulate cellular processes. These xerogels were prepared by a sol-gel approach allowing the incorporation of mineral phases. The resulting nanocomposites are designed as biomaterial for bone regeneration. Human osteoclasts derived from peripheral blood mononuclear cells were cultured both indirectly and directly, either in presence of different xerogel types or on their surface, to investigate the factor with the main influence on osteoclastogenesis. To this end, the incorporation of a third phase to silica/collagen xerogels was used to affect osteoclastogenesis. In cell culture, ambient ion conditions controlled by both the degradation products of the xerogel and the bioactivity-dependent ion release and reprecipitation were shown to have the main effect on osteoclast specific enzyme tartrate-resistant acid phosphatase (TRAP) 5b. Late stage of osteoclastogenesis characterized by resorption was strongly dependent on the xerogels composition. Surface chemistry of the xerogels was displayed to play an important role in osteoclast resorption. Biphasic silica/collagen xerogels and triphasic xerogels with calcium carbonate offered widespread resorbed areas, whereas hydroxyapatite containing xerogels showed distinctly reduced resorption. The incorporation of strontium carbonate and phosphate, respectively, as third phase changed TRAP 5b activity dose-dependently and inhibited resorption within 21 days. Quantitative evaluation on osteoclast differentiation was carried out using biochemical methods (TRAP 5b, cathepsin K) and was supported by confocal laser scanning microscopy and scanning electron microscopy (SEM). Qualitative estimation of resorption was carried out by SEM.
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Affiliation(s)
- S Rößler
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany.
| | - C Heinemann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - B Kruppke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - A S Wagner
- Department of Veterinary Clinical Science, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, University Giessen, Frankfurter Str. 98, D-35392 Giessen, Germany
| | - S Wenisch
- Department of Veterinary Clinical Science, Small Animal Clinic c/o Institute of Veterinary-Anatomy, -Histology and -Embryology, University Giessen, Frankfurter Str. 98, D-35392 Giessen, Germany
| | - H P Wiesmann
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
| | - T Hanke
- Max Bergmann Center of Biomaterials and Institute of Materials Science, Technical University Dresden, Budapester Str. 27, D-01069 Dresden, Germany
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Guenzinger R, Lange R, Rieß F, Hanke T, Bischoff N, Obadia JF, Sahar G, Bitran D, Roberts H, Bolling S. Six-month Performance of a Three-Dimensional Annuloplasty Ring for Repair of Functional Tricuspid Regurgitation. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627971] [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)
- R. Guenzinger
- Department of Cardiovascular Surgery, German Heart Center Munich, Munich, Germany
| | - R. Lange
- Department of Cardiovascular Surgery, German Heart Center Munich, Munich, Germany
| | - F. Rieß
- Department of Cardiac Surgery, Albertinen-Krankenhaus, Hamburg, Germany
| | - T. Hanke
- Department of Cardiac Surgery, Asklepios Klinikum Harburg, Hamburg, Germany
| | - N. Bischoff
- Department of Cardiac Surgery, Centre Hospitalier de Mulhouse - Hopital Emile Mulller, Mulhouse, France
| | - J.-F. Obadia
- Department of Cardiac Surgery, Hopitaux de Lyon - Hopital Louis Pradel, Bron, France
| | - G. Sahar
- Department of Cardiothoracic Surgery, Soroka Medical Center, Be'er Scheva, Beersheba, Israel
| | - D. Bitran
- Department of Cardiothoracic Surgery, Shaare Zedek Medical Center, Jerusalem, Israel
| | - H. Roberts
- Department of Cardiovascular Surgery, Florida Heart and Vascular Care, Aventura Hospital and Medical Center, Aventura, United States
| | - S. Bolling
- Department of Cardiac Surgery, University of Michigan, Ann Arbor, United States
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Stock S, Scharfschwerdt M, Meyer-Saraei R, Richardt D, Charitos EI, Sievers H, Hanke T. Vermeidung von Koronarobstruktionen durch die Verwendung kleinerer Transkatheterklappen. Z Herz- Thorax- Gefäßchir 2017. [DOI: 10.1007/s00398-017-0179-5] [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: 10/18/2022]
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Stock S, Scharfschwerdt M, Meyer-Saraei R, Richardt D, Charitos E, Sievers HH, Hanke T. St Jude Trifecta versus Edwards Perimount Magna Ease: No Difference in Coronary Flow after Transcatheter Aortic Valve-in-Valve Implantation. An In Vitro Investigation. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598969] [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. Stock
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
| | - M. Scharfschwerdt
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
| | - R. Meyer-Saraei
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
| | - D. Richardt
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
| | - E.I. Charitos
- Universitiy of Halle (Saale), Department of Cardiac Surgery, Halle (Saale), Germany
| | - H.-H. Sievers
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
| | - T. Hanke
- University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany
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Heinemann C, Heinemann S, Kruppke B, Worch H, Thomas J, Wiesmann H, Hanke T. Electric field-assisted formation of organically modified hydroxyapatite (ormoHAP) spheres in carboxymethylated gelatin gels. Acta Biomater 2016; 44:135-43. [PMID: 27544814 DOI: 10.1016/j.actbio.2016.08.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 08/04/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022]
Abstract
UNLABELLED A biomimetic strategy was developed in order to prepare organically modified hydroxyapatite (ormoHAP) with spherical shape. The technical approach is based on electric field-assisted migration of calcium ions and phosphate ions into a hydrogel composed of carboxymethylated gelatin. The electric field as well as the carboxymethylation using glucuronic acid (GlcA) significantly accelerates the mineralization process, which makes the process feasible for lab scale production of ormoHAP spheres and probably beyond. A further process was developed for gentle separation of the ormoHAP spheres from the gelatin gel without compromising the morphology of the mineral. The term ormoHAP was chosen since morphological analyses using electron microscopy (SEM, TEM) and element analysis (EDX, FT-IR, XRD) confirmed that carboxymethylated gelatin molecules use to act as organic templates for the formation of nanocrystalline HAP. The hydroxyapatite (HAP) crystals self-organize to form hollow spheres with diameters ranging from 100 to 500nm. The combination of the biocompatible chemical composition and the unique structure of the nanocomposites is considered to be a useful basis for future applications in functionalized degradable biomaterials. STATEMENT OF SIGNIFICANCE A novel bioinspired mineralization process was developed based on electric field-assisted migration of calcium and phosphate ions into biochemically carboxymethylated gelatin acting as organic template. Advantages over conventional hydroxyapatite include particle size distribution and homogeneity as well as achievable mechanical properties of relevant composites. Moreover, specifically developed calcium ion or phosphate ion release during degradation can be useful to adjust the fate of bone cells in order to manipulate remodeling processes. The hollow structure of the spheres can be useful for embedding drugs in the core, encapsulated by the highly mineralized outer shell. In this way, controlled drug release could be achieved, which enables advanced strategies for threating bone-related diseases, e.g. osteoporosis and multiple myeloma.
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Yan J, Mohammed S, Sievers H, Hanke T. Comparison of Manipulating Procedures of the Left Atrial Appendage for Prophylaxis of Postoperative Neurological Events. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571730] [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]
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Auer C, Scharfschwerdt M, Yan J, Sievers HH, Hanke T. Hemodynamic Behavior of Two 4th Generation Aortic Valve Bioprosthesis during Exercise. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571508] [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]
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Hanke T, Klein O, Yan J, Thiele H, Sievers H, Mohamed S. Proteomic Analysis of the Left Atrial Appendage in Atrial Fibrillation. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571770] [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]
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Hanke T, Stierle U, Graf B, Sievers HH, Ziegler P, Charitos E. The Temporal Atrial Fibrillation Pattern during the Blanking Period after Atrial Fibrillation Ablation Is Associated with Later AF Recurrence. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571771] [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]
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Stock S, Scharfschwerdt M, Meyer-Saraei R, Richardt D, Charitos E, Sievers HH, Hanke T. Does Undersizing of Transcatheter Aortic Valve Bioprostheses during Valve-in-valve Implantation Avoid Coronary Obstruction? An In Vitro Study. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Richardt D, Klotz S, Petersen M, Bucsky B, Hanke T, Stierle U, Sievers HH. Long Term Survival after Aortic Valve-sparing (David and Yacoub) Operation. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571612] [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]
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Richardt D, Hanke T, Thiele H, Sievers HH, Kurz T. Redo Transapical Procedure in a Calcified Transapical Edwards Sapien XT Prosthesis. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571744] [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]
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Hanke T, Stierle U, Graf B, Ziegler P, Sievers HH, Charitos E. Predictors of AF Recurrence after Surgical Ablation: Insights from Continuous Heart Rhythm Monitoring. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571547] [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]
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Blöcher R, Lamers C, Wittmann SK, Diehl O, Hanke T, Merk D, Steinhilber D, Schubert-Zsilavecz M, Kahnt AS, Proschak E. Design and synthesis of fused soluble epoxide hydrolase/peroxisome proliferator-activated receptor modulators. Med Chem Commun 2016. [DOI: 10.1039/c6md00042h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metabolic syndrome (MetS) is a widespread, complex disease cluster which consists of hypertension, atherosclerosis, dyslipidaemia and type II diabetes.
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Affiliation(s)
- R. Blöcher
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - C. Lamers
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - S. K. Wittmann
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - O. Diehl
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - T. Hanke
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - D. Merk
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - D. Steinhilber
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - M. Schubert-Zsilavecz
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - A. S. Kahnt
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
| | - E. Proschak
- Institute of Pharmaceutical Chemistry
- Goethe-University of Frankfurt
- D-60438 Frankfurt am Main
- Germany
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Morón-López S, Mothe B, Manzardo C, Sanchez-Bernabeu A, Coll P, Puertas M, Dorrell L, Miró J, Clotet B, Brander C, Martinez-Picado J, Hanke T. HIV conserved region vaccine in early cART-treated subjects (BCN01): impact on immunogenicity and the latent reservoir. J Virus Erad 2015. [DOI: 10.1016/s2055-6640(20)31333-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Martin H, Gutteck N, Matthies JB, Hanke T, Gradl G, Wohlrab D, Mittlmeier T, Grabow N. Possible reasons for early artificial bone failure in biomechanical tests of ankle arthrodesis systems. Current Directions in Biomedical Engineering 2015. [DOI: 10.1515/cdbme-2015-0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] Open
Abstract
Abstract
In order to demonstrate the influence of the boundary conditions in experimental biomechanical investigations of arthrodesis implants two different models were investigated. As basic model, a simplified finite element model of the cortical bone was used in order to compare the stress values with (Model 1) and without (Model 2) allowing horizontal displacements of the load application point. The model without constraints of horizontal displacements showed considerably higher stress values at the point of failure. Moreover, this investigation shows that the boundary conditions (e.g. constraints) have to be carefully considered, since simplifications of the reality with experimental tests cannot always be avoided.
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Affiliation(s)
- H. Martin
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - N. Gutteck
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - J.-B. Matthies
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - T. Hanke
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - G. Gradl
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - D. Wohlrab
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - Th. Mittlmeier
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
| | - N. Grabow
- Heiner Martin, University Medical Centre Rostock, Institute for Biomedical Engineering, F.-Barnewitz-Str. 4, 18119 Rostock
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Baur H, Hanke T, Bamert U, Bruhn S, Henle P. Reliability of hamstring reflex responses after tibia perturbation. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.272] [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: 11/16/2022]
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Charitos E, Stierle U, Klotz S, Hanke T, Sievers HH. A Decision Tree for the Replacement of the Ascending Aorta in Patients Undergoing Aortic Valve Surgery: A Single Center Experience in 1362 Patients. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544423] [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]
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Hanke T, Radtke A, Yan J, Godau B, Cordes J, Nigam V, Sievers H, Mohamed S. MiRNA 208a Expression in Atrial Fibrillation Categories. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544445] [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]
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Klotz S, Tsvelodub S, Hanke T, Petersen M, Stiele U, Sievers H. Outcome of Mitral Valve Surgery in Patients with Chronic Mitral Regurgitation and Low Ejection Fraction: Repair or Replacement? Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544319] [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]
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Klotz S, Hanke T, Petersen M, Sievers H. 292 * PERIPHERAL OR CENTRAL CANNULATION IN ACUTE TYPE A DISSECTION: DOES IT REALLY MATTER? Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.292] [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: 11/13/2022] Open
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Lips KS, Kauschke V, Hartmann S, Thormann U, Ray S, Schumacher M, Gelinsky M, Heinemann S, Hanke T, Kautz AR, Schnabelrauch M, Szalay G, Heiss C, Schnettler R, Alt V, Kilian O. Cholinergic nerve fibers in bone defects of a rat osteoporosis model and their regulation by implantation of bone substitution materials. J Musculoskelet Neuronal Interact 2014; 14:173-188. [PMID: 24879021] [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: 06/03/2023]
Abstract
OBJECTIVES Bone is innervated by autonomic nervous system that consists of sympathetic and parasympathetic nerves that were recently identified in bone. Thus we asked whether parasympathetic nerves occur in bone defects and at the interface of substitution materials that were implanted for stabilization and improvement of healing in an osteoporosis animal model. METHODS Osteoporosis was induced in rats by ovariectomy and deficiency diet. A wedge-shaped osteotomy was performed in the metaphyseal area of femur. Eight different implants were inserted that were based on calcium phosphate cement, iron, silica-mineralized collagen, and modifications with strontium. Nerves were identified by immunohistochemistry with antibodies against vesicular acetylcholine transporter (VAChT), tyrosine hydroxylase (TH) and protein gene product 9.5 (PGP 9.5) as neuronal marker. RESULTS Cholinergic nerves identified with VAChT immunostaining were detected in defects filled with granulation tissue and in surrounding mast cells. No immunolabeling of cholinergic nerves was found after implantation. The general presence of nerves was reduced after implantation as shown by PGP 9.5. Sympathetic nerves identified by TH immunolabeling were increased in strontium functionalized materials. CONCLUSION Since cholinergic innervation was diminished after implantation a further increase in the compatibility of substitution materials to nerves could improve defect healing especially in osteoporotic bone.
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Affiliation(s)
- K S Lips
- Laboratory for Experimental Trauma Surgery, Justus-Liebig University Giessen, Kerkraderstr. 9, 35394 Giessen, Germany
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Muehlenberg K, Hanke T, Ambrosch A. 81-jährige Patientin mit auffälliger Serumelektrophorese. Dtsch Med Wochenschr 2014; 139:719-20. [DOI: 10.1055/s-0034-1369860] [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: 10/25/2022]
Affiliation(s)
- K. Muehlenberg
- Klinik für Gastroenterologie und interventionelle Endoskopie, Krankenhaus Barmherzige Brüder, Regensburg
| | - T. Hanke
- Institut für Labormedizin, Mikrobiologie und Krankenhaushygiene, Krankenhaus Barmherzige Brüder, Regensburg
| | - A. Ambrosch
- Institut für Labormedizin, Mikrobiologie und Krankenhaushygiene, Krankenhaus Barmherzige Brüder, Regensburg
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Charitos E, Ziegler P, Stierle U, Graf B, Klotz S, Sievers HH, Hanke T. Atrial fibrillation burden estimates derived from intermittent rhythm monitoring should not be used for patient follow-up or as endpoints in clinical trials. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367170] [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: 10/25/2022]
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Charitos E, Stierle U, Karluß A, Misfeld M, Hanke T, Klotz S, Sievers HH. Aortic leaflet interventions for aortic valve repair: How much is too much? Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367235] [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: 10/25/2022]
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Sievers HH, Stierle U, Hanke T, Klotz S, Schmidtke C, Charitos E. Phenotype of bicuspid aortic valve and management of the ascending aorta in 1362 patients. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367233] [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: 10/25/2022]
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Charitos E, Stierle U, Hanke T, Klotz S, Sievers H. 222 * THE FATE OF BICUSPID VALVE AORTOPATHY AFTER AORTIC VALVE REPLACEMENT. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.222] [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: 11/13/2022] Open
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Charitos E, Stierle U, Tietze C, Karluss A, Hanke T, Misfeld M, Sievers H. 274 * CLINICAL OUTCOMES AND LESSONS LEARNED WITH AORTIC VALVE REPAIR IN 508 PATIENTS. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.274] [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: 11/14/2022] Open
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Weber CA, Hanke T, Deseigne J, Léonard S, Dauchot O, Frey E, Chaté H. Long-range ordering of vibrated polar disks. Phys Rev Lett 2013; 110:208001. [PMID: 25167452 DOI: 10.1103/physrevlett.110.208001] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Indexed: 06/03/2023]
Abstract
Vibrated polar disks have been used experimentally to investigate collective motion of driven particles, where fully ordered asymptotic regimes could not be reached. Here we present a model reproducing quantitatively the single, binary, and collective properties of this granular system. Using system sizes not accessible in the laboratory, we show in silico that true long-range order is possible in the experimental system. Exploring the model's parameter space, we find a phase diagram qualitatively different from that of dilute or pointlike particle systems.
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Affiliation(s)
- C A Weber
- Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Department of Physics, Ludwig-Maximilians-Universität München, 80333 Munich, Germany
| | - T Hanke
- Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Department of Physics, Ludwig-Maximilians-Universität München, 80333 Munich, Germany
| | - J Deseigne
- Laboratoire de Physique, ENS de Lyon and CNRS UMR 5672, 69007 Lyon, France
| | - S Léonard
- Service de Physique de l'Etat Condensé, CEA-Saclay and CNRS URA 2464, 91191 Gif-sur-Yvette, France
| | - O Dauchot
- Service de Physique de l'Etat Condensé, CEA-Saclay and CNRS URA 2464, 91191 Gif-sur-Yvette, France and EC2M-Gulliver, ESPCI-ParisTech and CNRS UMR 7083, 75005 Paris, France
| | - E Frey
- Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Department of Physics, Ludwig-Maximilians-Universität München, 80333 Munich, Germany
| | - H Chaté
- Service de Physique de l'Etat Condensé, CEA-Saclay and CNRS URA 2464, 91191 Gif-sur-Yvette, France and Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany
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Heinemann S, Heinemann C, Wenisch S, Alt V, Worch H, Hanke T. Erratum to: “Calcium phosphate phases integrated in silica/collagen nanocomposite xerogels enhance the bioactivity and ultimately manipulate the osteoblast/osteoclast ratio in a human co-culture model” [Acta Biomaterialia 9 (2013) 4878–4888]. Acta Biomater 2013. [DOI: 10.1016/j.actbio.2013.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Despang F, Bernhardt A, Lode A, Dittrich R, Hanke T, Shenoy SJ, Mani S, John A, Gelinsky M. Synthesis and physicochemical,in vitroandin vivoevaluation of an anisotropic, nanocrystalline hydroxyapatite bisque scaffold with parallel-aligned pores mimicking the microstructure of cortical bone. J Tissue Eng Regen Med 2013; 9:E152-66. [DOI: 10.1002/term.1729] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 12/12/2012] [Accepted: 01/28/2013] [Indexed: 02/06/2023]
Affiliation(s)
- F. Despang
- Technische Universität Dresden; Medical Faculty and University Hospital, Centre for Translational Bone, Joint and Soft Tissue Research; Dresden Germany
- Technische Universität Dresden; Institute for Materials Science, Max Bergmann Centre of Biomaterials; Dresden Germany
| | - A. Bernhardt
- Technische Universität Dresden; Medical Faculty and University Hospital, Centre for Translational Bone, Joint and Soft Tissue Research; Dresden Germany
- Technische Universität Dresden; Institute for Materials Science, Max Bergmann Centre of Biomaterials; Dresden Germany
| | - A. Lode
- Technische Universität Dresden; Medical Faculty and University Hospital, Centre for Translational Bone, Joint and Soft Tissue Research; Dresden Germany
- Technische Universität Dresden; Institute for Materials Science, Max Bergmann Centre of Biomaterials; Dresden Germany
| | - R. Dittrich
- TU Bergakademie Freiberg; Institute of Electronic und Sensor Materials; Freiberg Germany
| | - T. Hanke
- Technische Universität Dresden; Institute for Materials Science, Max Bergmann Centre of Biomaterials; Dresden Germany
| | - S. J. Shenoy
- Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram Kerala India
| | - S. Mani
- Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram Kerala India
| | - A. John
- Sree Chitra Tirunal Institute for Medical Sciences and Technology; Thiruvananthapuram Kerala India
| | - M. Gelinsky
- Technische Universität Dresden; Medical Faculty and University Hospital, Centre for Translational Bone, Joint and Soft Tissue Research; Dresden Germany
- Technische Universität Dresden; Institute for Materials Science, Max Bergmann Centre of Biomaterials; Dresden Germany
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Mohamed SA, Brandenburger M, Sievers HH, Wenzel J, Dendorfer A, Hanke T. A novel adult human atrium slice technique for studying electrical remodeling in atrial fibrillation. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332671] [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: 10/27/2022]
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Hanke T, Charitos EI, Stierle U, Auer C, Sievers HH. Hemodynamic performance of a new aortic valve bioprostheses (Trifecta; St. Jude Medical) at rest and exercise. A comparative study. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332627] [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: 10/27/2022]
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Charitos EI, Stierle U, Tietze C, Hamann L, Hanke T, Karlüß A, Petersen M, Klotz S, Sievers HH. Single center experience and lessons learned from 472 consecutive patients undergoing various types aortic valve repair procedures: A retrospective analysis. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332314] [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: 10/27/2022]
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Charitos EI, Stierle U, Ziegler P, Baldewig M, Sievers HH, Hanke T. Intermittent rhythm monitoring for the detection of atrial fibrillation after ablation interventions: Gambling or science? Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332419] [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: 10/27/2022]
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Hanke T, Charitos EI, Stierle U, Graf B, Baldewig M, Sievers HH. The surgical Cox Maze III procedure for the treatment of atrial fibrillation: Results from continuously monitored patients. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332427] [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: 10/27/2022]
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Ahmed T, Borthwick N, Yang H, Hancock G, Yorke L, Ebrahimsa U, Rose A, Black A, Hayton E, McMichael A, Dorrell L, Hanke T. Recombinant DNA/MVA/ChAdV-63-elicited T cells specific for conserved regions of the HIV-1 proteome recognize HIV-1 infected cells and suppress HIV-1. Retrovirology 2012. [PMCID: PMC3441714 DOI: 10.1186/1742-4690-9-s2-p259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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
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Rosario M, Koopman G, Mbewe-Mvula A, Knudsen ML, Quakkelaar ED, Borthwick N, Wagner R, Price DA, Liljestrom P, Melief CJ, Drijfhout JW, Colloca S, Nicosia A, Hanke T. Optimizing delivery of HIV-1 conserved region-derived immunogen for induction of T and B cell responses in rhesus macaques. Retrovirology 2012. [PMCID: PMC3441779 DOI: 10.1186/1742-4690-9-s2-p31] [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: 12/02/2022] Open
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Koopman G, Beenhakker N, Nieuwenhuis I, Doxiadis G, Mooij P, Drijfhout JW, Koestler J, Hanke T, Bontrop RE, Wagner R, Bogers WM, Melief CJ. SIVconsv DNA prime - TLR7/IFNα adjuvanted long peptide boost induces potent CD4+ Ab responses and protects against high dose intrarectal SIV challenge. Retrovirology 2012. [PMCID: PMC3441700 DOI: 10.1186/1742-4690-9-s2-p29] [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: 11/13/2022] Open
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Saubi N, Gea-Mallorquí E, Mbewe-Mvula A, Hurtado C, Gatell J, Hanke T, Joseph J. Pre-clinical development of BCG.HIVA(CAT) strain, an antibiotic-free selection strain for HIV-TB pediatric vaccine. Retrovirology 2012. [PMCID: PMC3441778 DOI: 10.1186/1742-4690-9-s2-p352] [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: 11/16/2022] Open
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Borthwick NJ, Ahmed T, Rose A, Ebrahimsa U, Black A, Hayton E, Yang H, Hancock G, Campion S, Frahm N, Colloca S, Nicosia A, McMichael A, Dorrell L, Hanke T. Immunogenicity of a universal HIV-1 vaccine vectored by DNA, MVA and CHADV-63 in a Phase I/IIA clinical trial. Retrovirology 2012. [PMCID: PMC3441377 DOI: 10.1186/1742-4690-9-s2-p118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
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Höhne S, Hanke T, Worch H, Simon F. Heterogene Sulfatierung von Chitosan. CHEM-ING-TECH 2012. [DOI: 10.1002/cite.201250378] [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: 11/12/2022]
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Israel CW, Bänsch D, Böcker D, Butter C, Chun J, Deisenhofer I, Eckardt L, Geller JC, Hanke T, Klingenheben T, Piorkowski C, Schumacher B. [Recommendations of the Working Group of Arrhythmias of the German Society of Cardiology on the approach to patients with Riata® and Riata ST® leads (St. Jude Medical). Nucleus of the Working Group of Arrhythmias of the German Society of Cardiology]. Herzschrittmacherther Elektrophysiol 2012; 23:107-115. [PMID: 22847674 DOI: 10.1007/s00399-012-0186-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Riata® and Riata ST® implantable cardioverter defibrillator (ICD) leads (St. Jude Medical, Sylmar, CA) show an increased incidence of insulation defects, particularly "inside-out" lead fracture where inner, separately insulated cables penetrate through the surrounding silicone of the lead body. The exact incidence of Riata® lead problems is not clear and seems to range between 2-4% per year in the first 5 years after implantation according to new registry data. We recommend beyond a detailed information the following care of patients with Riata® and Riata ST® leads: 1) Activation of automatic ICD alerts, 2) remote monitoring with automatic daily alerts whenever possible, 3) monthly ICD controls in patients at high risk (pacemaker dependency, history of ventricular tachyarrhythmias) and high or moderate lead-related risk (8F, 7F single coil), 3-monthly controls in moderate patient and lead-related risk, 3 to 6-monthly controls in low patient and lead-related risk (no bradycardia, no history of ventricular tachyarrhythmia). Every ICD control should include meticulous analysis of oversensing artifacts in stored electrograms (EGMs) of sustained and non-sustained ventricular tachyarrhythmias and registration of EGMs during provocation testing (pectoral muscle activity, arm movements). If electrical abnormalities are observed, reoperation with addition of a new ICD lead is recommended; lead extraction only if indicated according to current guidelines. Fluoroscopy should only be performed if electrical abnormalities are found by an experienced electrophysiologist and a high frame rate and resolution. Management of fluoroscopic abnormalities in the absence of electrical abnormalities is not clear. Therefore, routine fluoroscopy of patients with Riata® leads without electrical abnormalities is not recommended.
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Affiliation(s)
- C W Israel
- Klinik für Innere Medizin - Kardiologie, Diabetologie & Nephrologie, Evangelisches Krankenhaus Bielefeld, Burgsteig 13, 33617, Bielefeld, Deutschland.
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