IBT Publications by Unger


Journal Articles (15)

L. A. Unger, C. Martínez Antón, M. Stritt, R. Wakili, A. Haas, M. Kircher, O. Dössel, and A. Luik.
In Silico Study of Local Electrical Impedance Measurements in the Atria - Towards Understanding and Quantifying Dependencies in Human..
In IEEE Transactions on Bio-Medical Engineering, vol. 70(2) , pp. 533-542, 2023
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L. A. Unger, L. Schicketanz, T. Oesterlein, M. Stritt, A. Haas, C. Martínez Antón, K. Schmidt, O. Doessel, and A. Luik.
Local Electrical Impedance Mapping of the Atria: Conclusions on Substrate Properties and Confounding Factors.
In Frontiers in Physiology, vol. 12, 2022
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L. A. Unger, L. Azzolin, M. Nothstein, J. Sánchez, A. Luik, G. Seemann, S. Yeshwant, T. Oesterlein, O. Dössel, C. Schmitt, P. Spector, and A. Loewe.
Cycle length statistics during human atrial fibrillation reveal refractory properties of the underlying substrate: a combined in silico and clinical test of concept study..
In EP Europace, vol. 23(Supplement_1) , pp. i133-i142, 2021
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L. Azzolin, M. Eichenlaub, C. Nagel, D. Nairn, J. Sánchez, L. Unger, T. Arentz, D. Westermann, O. Dössel, A. Jadidi, and A. Loewe.
AugmentA: Patient-specific augmented atrial model generation tool..
In Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society, vol. 108, pp. 102265-102265, 2023
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M. Vila, M. W. Rivolta, C. A. Barrios Espinosa, L. A. Unger, A. Luik, A. Loewe, and R. Sassi.
Recommender system for ablation lines to treat complex atrial tachycardia.
In Computer Methods and Programs in Biomedicine, vol. 231, pp. 107406, 2023
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L. Azzolin, M. Eichenlaub, C. Nagel, D. Nairn, J. Sanchez, L. Unger, O. Dössel, A. Jadidi, and A. Loewe.
Personalized ablation vs. conventional ablation strategies to terminate atrial fibrillation and prevent recurrence.
In EP Europace, vol. 25(1) , pp. 211-222, 2023
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A. Luik, K. Schmidt, A. Haas, L. Unger, P. Tzamalis, and B. Brüggenjürgen.
Ablation of Left Atrial Tachycardia following Catheter Ablation of Atrial Fibrillation: 12-Month Success Rates.
In Journal of Clinical Medicine, vol. 11(4) , pp. 1047, 2022
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M. Nothstein, A. Luik, A. Jadidi, J. Sánchez, L. A. Unger, E. M. Wülfers, O. Dössel, G. Seemann, C. Schmitt, and A. Loewe.
CVAR-Seg: An Automated Signal Segmentation Pipeline for Conduction Velocity and Amplitude Restitution..
In Frontiers in Physiology, vol. 12, pp. 673047, 2021
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J. Sánchez, G. Luongo, M. Nothstein, L. A. Unger, J. Saiz, B. Trenor, A. Luik, O. Dössel, and A. Loewe.
Using Machine Learning to Characterize Atrial Fibrotic Substrate From Intracardiac Signals With a Hybrid in silico and in vivo Dataset.
In Frontiers in Physiology, vol. 12, pp. 699291, 2021
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M. Vila, M. W. Rivolta, G. Luongo, L. A. Unger, A. Luik, L. Gigli, F. Lombardi, A. Loewe, and R. Sassi.
Atrial Flutter Mechanism Detection Using Directed Network Mapping.
In Frontiers in Physiology, vol. 12, 2021
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F. Wiedmann, C. Beyersdorf, X. Zhou, A. Büscher, M. Kraft, J. Nietfeld, T. P. Walz, L. A. Unger, A. Loewe, B. Schmack, A. Ruhparwar, M. Karck, D. Thomas, M. Borggrefe, G. Seemann, H. A. Katus, and C. Schmidt.
Pharmacologic TWIK‐Related Acid‐Sensitive K+ Channel (TASK‐1) Potassium Channel Inhibitor A293 Facilitates Acute Cardioversion of Paroxysmal Atrial Fibrillation in a Porcine Large Animal Model.
In Journal of the American Heart Association, vol. 9(10) , 2020
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D. Frisch, T. G. Oesterlein, L. A. Unger, G. Lenis, R. Wakili, C. Schmitt, A. Luik, O. Doessel, and A. Loewe.
Mapping and Removing the Ventricular Far Field Component in Unipolar Atrial Electrograms..
In IEEE Transactions on Biomedical Engineering, vol. 67(10) , pp. 2905-2915, 2020
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J. Sánchez, M. Nothstein, L. Unger, J. Saiz, B. Trénor, O. Dössel, and A. Loewe.
Influence of Fibrotic Tissue Arrangement on Intracardiac Electrograms During Persistent Atrial Fibrillation.
2019
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M. Alessandrini, M. Valinoti, L. Unger, T. Oesterlein, O. Dössel, C. Corsi, A. Loewe, and S. Severi.
A Computational Framework to Benchmark Basket Catheter Guided Ablation in Atrial Fibrillation.
In Frontiers in Physiology, vol. 9, pp. 1251, 2018
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Book Chapters (1)

J. Steyer, L. P. M. Diaz, L. A. Unger, and A. Loewe.
Simulated Excitation Patterns in the Atria and Their Corresponding Electrograms.
In Functional Imaging and Modeling of the Heart, Springer Nature Switzerland, Cham, pp. 204-212, 2023
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Conference Contributions (15)

L. A. Unger, A. Luik, A. Haas, and O. Dössel.
Comparison of Morphology-Based and Delay-Based Measures for Reference Beat Classification during Atrial Tachycardia.
In Computing in Cardiology Conference (CinC), 2020
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L. A. Unger, T. G. Oesterlein, A. Loewe, and O. Dössel.
Noise quantification and noise reduction for unipolar and bipolar electrograms.
In Computing in Cardiology (CinC), vol. 46, 2019
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L. A. Unger, T. G. Oesterlein, P. Spector, A. Luik, C. Schmitt, A. Loewe, and O. Dössel.
Cycle Length Statistics During Atrial Fibrillation Reflect Refractory Properties of the Underlying Substrate.
In Annual Congress of the European Cardiac Arrhythmia Society, pp. 16-27 A15-61, 2018
L. Unger, T. Oesterlein, O. Dössel, G. Seemann, P. Spector, and A. Loewe.
Estimating refractory periods during atrial fibrillation based on electrogram cycle lengths in a heterogeneous simulation setup.
In Current Directions in Biomedical Engineering, vol. 3(2) , pp. 317-320, 2017
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L. A. Unger, M. Rottmann, O. Dössel, and G. Seemann.
Detecting phase singularities and rotor center trajectories based on the Hilbert transform of intraatrial electrograms in an atrial voxel model.
In Current Directions in Biomedical Engineering, vol. 1(1) , pp. 38-41, 2015
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P. Martínez Díaz, C. Götz, A. Dasi i Martinez, L. A. Unger, A. Haas, A. Luik, O. Doessel, and A. Loewe.
Impact of effective refractory period personalization on prediction of atrial fibrillation vulnerability.
In EHRA 2023, 2023
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C. Martínez Antón, J. Sánchez, N. Caslli, L. Heinemann, L. A. Unger, A. Loewe, and O. Dössel.
In Silico Computation of Electrograms and Local Electrical Impedance to Assess Non-Transmural Fibrosis.
In 2023 Computing in Cardiology (CinC)(10363691) , pp. 1-4, 2023
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L. Schicketanz, L. A. Unger, J. Sánchez, O. Dössel, and A. Loewe.
Separating atrial near fields and atrial far fields in simulated intra-atrial electrograms.
In Current Directions in Biomedical Engineering, vol. 7(2) , pp. 175-178, 2021
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O. Dössel, C. Schmitt, L. Unger, A. Loewe, and A. Luik.
Atrial Signals 2021. Book of Abstracts.
In 4th Atrial Signals Proceedings, 2021
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C. Martinez Anton, L. A. Unger, and O. Dössel.
Analyzing the Effect of Catheter-Sheath Overlapping Status in Local Impedance Simulations.
In 4th Atrial Signals Proceedings, pp. 10, 2021
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C. Nagel, N. Pilia, L. Unger, and O. Dössel.
Performance of Different Atrial Conduction Velocity Estimation Algorithms Improves with Knowledge about the Depolarization Pattern.
In Current Directions in Biomedical Engineering, vol. 5(1) , pp. 101-104, 2019
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T. P. Almeida, L. A. Unger, D. C. Soriano, X. Li, O. Dössel, T. Yoneyama, and A. Loewe.
Recurrence Quantification Analysis for Investigating Atrial Fibrillation Dynamics in a Heterogeneous Simulation Setup*.
In 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), pp. 2277-2280, 2019
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O. Huhn, S. Pollnow, L. Unger, O. Dössel, T. Oesterlein, A. Luik, and C. Schmitt.
High-density Mapping Reveals Short-term Reversibility of Atrial Ablation Lesions.
In Current Directions in Biomedical Engineering, vol. 4(1) , pp. 385-388, 2018
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O. Dössel, T. Oesterlein, L. Unger, A. Loewe, C. Schmitt, and A. Luik.
Spatio-temporal Analysis of Multichannel Atrial Electrograms Based on a Concept of Active Areas.
In Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, vol. 2018, pp. 490-493, 2018
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M. Rottmann, L. Unger, W. Kaltenbacher, G. Seemann, A. Loewe, M. W. Krueger, A. S. Jadidi, T. Arentz, and O. Doessel.
Methods for analyzing signal characteristics of stable and unstable rotors in a realistic heart model.
In 2015 Computing in Cardiology Conference (CinC), pp. 485-488, 2015
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Dissertations (1)

L. A. Unger.
Multimodal Characterization of the Atrial Substrate - Risks and Rewards of Electrogram and Impedance Mapping.
Karlsruher Institut für Technologie (KIT). Dissertation. 2022
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Student Theses (2)

L. A. Unger.
Substrate Mapping During Atrial Fibrillation - A Combined in Silico and Clinical Test of Concept Study.
Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT). Masterarbeit. 2017
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L. A. Unger.
Simulation based Estimation of Parameters for Reentries in Human Atria.
Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT). Bachelorarbeit. 2014
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