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477 results on '"Sündermann Simon"'

1. DL-based segmentation of endoscopic scenes for mitral valve repair

Author

Ivantsits Matthias, Tautz Lennart, Sündermann Simon, Wamala Isaac, Kempfert Jörg, Kuehne Titus, Falk Volkmar, and Hennemuth Anja

Subjects
deep learning, detection, endoscopic, machine learning, mitral valve, mitral valve leaflet, segmentation, surgery, Medicine
Abstract

Minimally invasive surgery is increasingly utilized for mitral valve repair and replacement. The intervention is performed with an endoscopic field of view on the arrested heart. Extracting the necessary information from the live endoscopic video stream is challenging due to the moving camera position, the high variability of defects, and occlusion of structures by instruments. During such minimally invasive interventions there is no time to segment regions of interest manually. We propose a real-time-capable deep-learning-based approach to detect and segment the relevant anatomical structures and instruments. For the universal deployment of the proposed solution, we evaluate them on pixel accuracy as well as distance measurements of the detected contours. The U-Net, Google’s DeepLab v3, and the Obelisk-Net models are cross-validated, with DeepLab showing superior results in pixel accuracy and distance measurements.

Published
2020
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2. Intraventricular flow features and cardiac mechano-energetics after mitral valve interventions – feasibility of an isolated heart model

Author

Vellguth Katharina, Sündermann Simon, Escher Andreas, Bierewirtz Tim, Schmidt Tanja, Alogna Alessio, Kertzscher Ulrich, Goubergrits Leonid, Fraser Katharine H., and Granegger Marcus

Subjects
ex-vivo, isolated heart, mechano-energetics, mitraclip®, mitral valve intervention, mitral valve prosthesis, 3r, ventricular flow, Medicine
Abstract

The aim of this work was the development of an isolated heart setup to delineate the interactions between intraventricular flow features, hemodynamic parameters and mechano-energetics after certain mitral valve therapies. Five porcine hearts were explanted and prepared for (i) edge-to-edge mitral valve repair, (ii) implantation of a rotatable biscupid mechanical valve prosthesis. Flow structures were visualized using echocardiography while hemodynamics was recorded in terms of pressures, flow rates and ventricular volume. Hemodynamic and cardiac mechano-energetics implied a marginal effect (

Published
2020
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8. 3D Mitral Valve Surface Reconstruction from 3D TEE via Graph Neural Networks

Author

Ivantsits, Matthias, Pfahringer, Boris, Huellebrand, Markus, Walczak, Lars, Tautz, Lennart, Nemchyna, Olena, Akansel, Serdar, Kempfert, Jörg, Sündermann, Simon, Hennemuth, Anja, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Camara, Oscar, editor, Puyol-Antón, Esther, editor, Qin, Chen, editor, Sermesant, Maxime, editor, Suinesiaputra, Avan, editor, Wang, Shuo, editor, and Young, Alistair, editor

Published
2022
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14. Early clinical outcomes of Portico and Edwards Sapien 3 valve prosthesis in transcatheter aortic valve replacement: propensity-matched analysis.

Author

Primessnig, Uwe, Wiedenhofer, Julia M., Trippel, Tobias D., Loddenkemper, Carina M., Schrader, Helene, Brand, Anna, Spethmann, Sebastian, Stangl, Karl, Haghikia, Arash, Landmesser, Ulf, Boldt, Leif-Hendrik, Blaschke, Florian, Hindricks, Gerhard, Sündermann, Simon H., Grubitzsch, Herko, Falk, Volkmar, Dreger, Henryk, and Sherif, Mohammad

Published
2024
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15. The role of concomitant coronary artery bypass grafting in acute type A aortic dissection complicated by coronary malperfusion.

Author

Pitts, Leonard, Kofler, Markus, Montagner, Matteo, Heck, Roland, Kurz, Stephan Dominik, Sündermann, Simon, Falk, Volkmar, and Kempfert, Jörg

Subjects
CORONARY artery bypass, ARTERIAL dissections, AORTIC dissection, CARDIAC output, TREATMENT effectiveness
Abstract

OBJECTIVES Managing acute type A aortic dissection with coronary malperfusion is challenging. This study outlines our revascularization strategy for these patients. METHODS Patients undergoing surgery for acute type A aortic dissection with coronary malperfusion and aortic root involvement from January 2000 to December 2021 were included. Patients were classified using the Neri classification for coronary dissection, including a novel 'Neri −' class (no coronary dissection). Patients undergoing revascularization either as a planned or as a bailout strategy due to persisting low cardiac output were compared additionally. RESULTS The cohort comprised 195 patients: 43 (22%) Neri −, 43 (22%) Neri A, 74 (38%) Neri B and 35 (18%) Neri C. Aortic root replacement was mainly performed in 25 Neri C patients (71%; P  < 0.001). Concomitant bypass surgery was performed in 4 (9%) of Neri −, 5 (12%) of Neri A, 21 (28%) of Neri B and 32 (91%) of Neri C patients (P  < 0.001). Thirty-day mortality was 42% with 21 (49%) Neri −, 12 (28%) Neri A, 30 (41%) Neri B and 19 (54%) Neri C patients (P  = 0.087). Bailout revascularization was primarily performed in 11 Neri B patients (69%; P  = 0.001) and associated with a higher 30-day mortality of 81% compared to 48% for planned revascularization (P  = 0.042). CONCLUSIONS Postoperative outcomes in case of coronary malperfusion are poor, irrespective of the anatomic dissection pattern. The decision for concomitant bypass surgery is crucial but may be considered in Neri C patients combined with aortic root replacement. Bailout revascularization was most common in Neri B and showed dismal outcome. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Mesh Based Approximation of the Left Ventricle Using a Controlled Shrinkwrap Algorithm

Author

Razafindrazaka, Faniry H., Vellguth, Katharina, Degener, Franziska, Suendermann, Simon, Kühne, Titus, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Coudière, Yves, editor, Ozenne, Valéry, editor, Vigmond, Edward, editor, and Zemzemi, Nejib, editor

Published
2019
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18. A Novel Hybrid Membrane VAD as First Step Toward Hemocompatible Blood Propulsion

Author

Ferrari, Aldo, Giampietro, Costanza, Bachmann, Björn, Bernardi, Laura, Bezuidenhhout, Deon, Ermanni, Paolo, Hopf, Raoul, Kitz, Sarah, Kress, Gerald, Loosli, Christian, Marina, Vita, Meboldt, Mirko, Pellegrini, Giovanni, Poulikakos, Dimos, Rebholz, Mathias, Schmid Daners, Marianne, Schmidt, Tanja, Starck, Christoph, Stefopoulos, Georgios, Sündermann, Simon, Thamsen, Bente, Zilla, Peter, Potapov, Evgenij, Falk, Volkmar, and Mazza, Edoardo

Published
2021
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23. A simulation-based phantom model for generating synthetic mitral valve image data–application to MRI acquisition planning

Author

Manini, Chiara, primary, Nemchyna, Olena, additional, Akansel, Serdar, additional, Walczak, Lars, additional, Tautz, Lennart, additional, Kolbitsch, Christoph, additional, Falk, Volkmar, additional, Sündermann, Simon, additional, Kühne, Titus, additional, Schulz-Menger, Jeanette, additional, and Hennemuth, Anja, additional

Published
2023
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33. Preinterventional frailty assessment in patients scheduled for cardiac surgery or transcatheter aortic valve implantation: a consensus statement of the European Association for Cardio-Thoracic Surgery (EACTS) and the European Association of Preventive Cardiology (EAPC) of the European Society of Cardiology (ESC)

Author

Niebauer, Josef, Bäck, Caroline, Bischoff-Ferrari, Heike A, Dehbi, Hakim-Moulay, Szekely, Andrea, Völler, Heinz, and Sündermann, Simon H

Published
2024
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38. Computational Stent Placement in Transcatheter Aortic Valve Implantation

Author

Russ, Christoph, Hopf, Raoul, Sündermann, Simon H., Born, Silvia, Hirsch, Sven, Falk, Volkmar, Székely, Gábor, Gessat, Michael, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Bello, Fernando, editor, and Cotin, Stéphane, editor

Published
2014
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39. Preinterventional frailty assessment in patients scheduled for cardiac surgery or transcatheter aortic valve implantation: a consensus statement of the European Association for Cardio-Thoracic Surgery (EACTS) and the European Association of Preventive Cardiology (EAPC) of the European Society of Cardiology (ESC)

Author

Sündermann, Simon H, Bäck, Caroline, Bischoff-Ferrari, Heike A, Dehbi, Hakim-Moulay, Szekely, Andrea, Völler, Heinz, and Niebauer, Josef

Subjects
*HEART valve prosthesis implantation, *GERIATRIC assessment, *HEART failure, *CARDIAC surgery, *MITRAL valve insufficiency, *FRAILTY, *QUALITY of life, *CORONARY artery bypass, AORTIC valve surgery
Abstract

Google Scholar Crossref Search ADS PubMed WorldCat 37 Saji M, Lim DS, Ragosta M, LaPar DJ, Downs E, Ghanta RK et al Usefulness of Psoas Muscle Area to Predict Mortality in Patients Undergoing Transcatheter Aortic Valve Replacement. Based on that, they built 3 groups of patients with different stages of frailty and found that frail patients had significantly lower SF-36 scores for general health, social functioning and role emotional after the procedure and that severely frail patients had worse postoperative SF-36 scores than moderately and not-frail patients. 3.4 Summary of consensus statements on frailty assessment in transcatheter aortic valve impla... 3.4.1 Consensus statements: prediction of mortality after transcatheter aortic valve implantation HT

Consensus statements: prediction of mortality after transcatheter aortic valve implantation. Preventive Cardiology (EAPC) of the European Society of Cardiology (ESC). [Extracted from the article]

Published
2023
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47. Valve embolization during transcatheter aortic valve implantation: Incidence, risk factors and follow-up by computed tomography

Author

Frumkin, David, primary, Pietron, Malte, additional, Kind, Andreas, additional, Brand, Anna, additional, Knebel, Fabian, additional, Laule, Michael, additional, Leistner, David M., additional, Landmesser, Ulf, additional, Krackhardt, Florian, additional, Sherif, Mohammad, additional, Sündermann, Simon H., additional, Grubitzsch, Herko, additional, Lembcke, Alexander, additional, Niehues, Stefan M., additional, Stangl, Karl, additional, and Dreger, Henryk, additional

Published
2022
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