TY - GEN A1 - Knaut, M. A1 - Spitzer, Stefan G. A1 - Karolyi, L. A1 - Ebert, H.-H. A1 - Richter, P. A1 - Tugtekin, Sems M. A1 - Schuler, S. T1 - Intraoperative Microwave Ablation for Curative Treatment of Atrial Fibrillation in Open Heart Surgery - The MICRO-STAF and MICRO-PASS Pilot Trial T2 - The thoracic and cardiovascular surgeon N2 - Concomitant microwave ablation for curative treatment of atrial fibrillation (AF) was performed in 18 patients with history of chronic atrial fibrillation and indication for open heart surgery, 11 patients with mitral valve replacement and 7 patients with coronary artery bypass grafting. There were no perioperative complications. During the postoperative period most of the patients had intermittent AF, they received low dose Sotalol therapy and electric cardio-versions. Up to now seven patients have reached follow-up day 90. One patient has persistent AF. Two patients had typical atrial flutter that was electrically converted to sinus rhythm (SR), isthmus ablation is planned. The other four patients have SR, one patient without cardioversions. These four patients show recovered atrial function with observed A-wave for transmitral flow. Under visual guidance the continuous atrial lesion lines could be induced effectively and safely by the intraoperative device Lynx. KW - Atrial fibrillation KW - Intraoperative microwave ablation Y1 - 1999 UR - https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-2007-1013205 U6 - https://doi.org/10.1055/s-2007-1013205 SN - 1439-1902 SN - 0171-6425 VL - 47 IS - Suppl. 3 SP - 379 EP - 384 ER - TY - GEN A1 - Piriz, S. A. A1 - Piriz, Antonio R. A1 - Tahir, Naeem A. A1 - Richter, Sebastian A1 - Bestehorn, Michael T1 - Rayleigh-Taylor instability in elastic-plastic solid slabs bounded by a rigid wall T2 - Physical Review E N2 - The linear evolution of the incompressible Rayleigh-Taylor instability for the interface between an elastic-plastic slab medium and a lighter semi-infinite ideal fluid beneath the slab is developed for the case in which slab is attached to a rigid wall at the top surface. The theory yields the maps for the stability in the space determined by the initial perturbation amplitude and wavelength, as well as for the transition boundary from the elastic to the plastic regimes for arbitrary thicknesses of the slab and density contrasts between the media. In particular, an approximate but very accurate scaling law is found for the minimum initial perturbation amplitude required for instability and for the corresponding perturbation wavelength at which it occurs. These results allows for an interpretation of the recent experiments by Maimouni et al. [Phys. Rev. Lett. 116, 154502 (2016)]. KW - Rayleigh-Taylor instability KW - Research Areas Flow instability KW - Research Areas Nonlinear phenomena in plasmas KW - Plasma instabilities Plasma macroinstabilities Y1 - 2021 UR - https://journals.aps.org/pre/abstract/10.1103/PhysRevE.103.023105 U6 - https://doi.org/10.1103/PhysRevE.103.023105 SN - 2470-0045 VL - 103 IS - 2 SP - 023105-1 EP - 023105-12 ER - TY - GEN A1 - Harlander, U. A1 - Schön, F.-T. A1 - Borcia, I. D. A1 - Richter, S. A1 - Borcia, R. A1 - Bestehorn, M. T1 - Resonant water-waves in ducts with different geometries: forced KdV solutions T2 - European Journal of Mechanics - B/Fluids Y1 - 2024 U6 - https://doi.org/10.1016/j.euromechflu.2024.03.008 SN - 0997-7546 VL - 106 IS - July–August 2024 SP - 107 EP - 115 ER - TY - GEN A1 - Borcia, I. D. A1 - Bestehorn, M. A1 - Borcia, R. A1 - Schön, F.-T. A1 - Harlander, U. A1 - Richter, S. T1 - Mean flow generated by asymmetric periodic excitation in an annular channel T2 - The European Physical Journal Special Topics Y1 - 2024 U6 - https://doi.org/10.1140/epjs/s11734-024-01181-8 VL - 233 (2024) SP - 1665 EP - 1672 PB - Springer ER - TY - GEN A1 - Schön, F.-T. A1 - Borcia, I. D. A1 - Harlander, U. A1 - Borcia, R. A1 - Richter, S. A1 - Bestehorn, M. T1 - Resonant surface waves in an oscillating periodic tank with a submerged hill T2 - Journal of Fluid Mechanics Y1 - 2024 U6 - https://doi.org/10.1017/jfm.2024.885 VL - 999 (2024) SP - 1 EP - 18 ER -