Et profilbilde

Professor
Trygve Christian Eftestøl { "honorific-suffix": "Professor", "fn": "Trygve Christian Eftestøl", "tel": "Telefon: 51832035", "email": "trygve.eftestol@uis.no" }

Avdeling/enhet Det teknisk- naturvitenskapelige fakultet
Institutt/senter Institutt for data- og elektroteknikk
Rom KE E-425B
Hjemmeside http://www.ux.uis.no/~trygve-e/

Forskningsområder

The Biomedical data analysis group at the University of Stavanger has its basis in a number of active researchers with a proven track record. The research area's scope is data analysis encompassing signal and image processing statistical analysis applied to a wide variety of projects within biology and medicine. The group is involved in multidisciplinary research with both national and international collaborators.

The research group is cross disciplinary as it relies increasingly on ideas and approaches taken from a number of scientific disciplines and application areas such as signal and image analysis, statistics, pattern recognintion, biology, chemistry and medicine. The main reseach activites are based on a solid foundation of competencies within these fields as documented by an extensive publications history, held by the scientists associated with the program. The group is also able to develop new methodology were existing methods do not exist.

Utvalgte publikasjoner

Articles in international refereed journals

  1. T.Eftestøl, K.H. Thorsen, E.Tøssebro, C.Rong, and P.A. Steen, Representing resuscitation data - Considerations on efficient analysis of quality of cardiopulmonary resuscitation , Resuscitation, vol. 80, pp. 311-317, 2009.

  2. K.H. Thorsen, T.Eftestøl, E.Tøssebro, C.Rong, and P.A. Steen, Using ontologies to integrate and share resuscitation data from diverse medical devices , Resuscitation, 2009,doi:10.1016/j.resuscitation.2008.12.018.

  3. J.T. Kvaløy, E.Skogvoll, T.Eftestøl, K.Gundersen, J.Kramer-Johansen, T.M. Olasveengen, and P.A. Steen, Which factors influence spontaneous state transitions during resuscitation? Resuscitation 2009, doi:10.1016/j.resuscitation.2009.04.042.

  4. T.M. Olasveengen, T.Eftestøl, K.Gundersen, L.Wik, and K.Sunde, Ischemic heart disease alters ventricular fibrillation waveform characteristics in out-ofhospital cardiac arrest , Resuscitation, 2009, doi:10.1016/j.resuscitation.2009.01.012.

  5. K.Gundersen, J.T. Kvaløy, J.Kramer-Johansen, P.A. Steen, and T.Eftestøl, Development of the probability of return of spontaneous circulation in intervals without chest compressions during out-of-hospital cardiac arrest: an observational study , BMC Medicine, 2009, vol.7, doi:10.1186/1741-7015-7-6.

  6. U.Irusta, J.Ruiz, S.Ruiz de Gauna, T.Eftestøl, and J.Kramer-Johansen, A least mean square filter for the estimation of the cardiopulmonary resuscitation artifact based on the frequency of the compressions , IEEE Transactions on Biomedical Engineering, 2009, doi:10.1109/TBME.2008.2010329.

  7. K.Gundersen, J.Nysæther, J.T.Kvaløy, J.Kramer-Johansen, and T.Eftestøl, Chest compression quality factors influencing the temporal development of ROSC-predictors calculated from the ECG during VF , Resuscitation, vol.80, pp.177-182, 2009.

Pågående forskning

Management and analysis of resuscitation data

In Norway alone resuscitation is started on approximately 3000 patients with cardiac arrest out-of-hospital per year plus a considerable number in-hospital. Our activities directed towards therapy of acute cardiac arrest has been going on since 1996 and our previous research results within this field have been extensively published in highly reputed international medical and signal processing journals .

Eftestølcontributed as coauthor on a chapter on Analysis and Predictive Value of the Ventricular Fibrillation Waveform in the second edition of the book: Cardiac Arrest - The Science and Practice of Resuscitation Medicine published by Cambridge University Press in 2007. We collaborate with several medical groups, both on national and international level. This project has been going on since the end of 1996 in collaboration with Laerdal Medical, The Cardiopulmonary Resuscitation Research Group in Oslo, The Group for Cardiovascular and Emergency Medical Research in Trondheim, Universitatsklinik fur Notfallsmedizin in Vienna, The Department of Anaestesiology Critical Care and Emergency Medicine in Innsbruck and The Signal Processing Research Group in Bilbao.

Analysis of magnetic resonance images and intercardial ECG from patients with myocardial infarctionIn many patients having suffered from myocardial infarction the risk of suffering cardiac arrest will be considered severe enough for implantation of an internal cardiac defibrillater (ICD). The ICD monitors the cardiac rhythm represented by an electrogram (EGM). The ICD analyses the cardiac rhythm continuously by analysing the EGM. An electric countershock is provided if cardiac arrest is detected. It is interesing to study if changes can be detected in the electrical conductive system in the heart. Such changes can occur if the dead scar tissue in the infarcted heart changes. Therefore we study changes in the EGM over time in ICD patients as well as analysing magnetic resonance images of the myocardial scar tissue to see if there are differences in those suffering from cardiac arrest to those who do not. If methods can be found to predict which patients will suffer from cardiac arrest, unneccessary implantations can be avoided. This project has been going on since the end of 2006 in collaboration with Dr Leik Woie, Dr Stein ørn at the department of cardiology at the Stavanger University Hospital (SUS).

Arbeidserfaring

Vitenskapelige publikasjoner (fra CRISTin)

  • Oppedal, Ketil; Eftestøl, Trygve Christian; Engan, Kjersti; Aarsland, Dag; Beyer, Mona K. (2016). White Matter Lesions and Pattern Recognition in MRI of Neurodegenerative Dementia. Universitetet i Stavanger. ISBN 978-82-7644-674-6. 166 s.
  • Vu, Thi Phuong Huyen; Eftestøl, Trygve Christian; Engan, Kjersti (2016). Respiratory-cardio signal processing and analysis of resuscitation data on newborns in low-resource settings. Universitetet i Stavanger. ISBN 978-82-7644-661-6. 174 s.
  • Eftestøl, Trygve (2000). Signal analysis of out-of-hospital cardiac arrest electrocardiograms for decision support during cardiopulmonary resuscitation. Tapir. 160 s.
  • Khanmohammadi, Mahdieh; Engan, Kjersti; Eftestøl, Trygve Christian; sæland, charlotte; Larsen, Alf Inge (2017). SEGMENTATION OF CORONARY ARTERIES FROM X-RAY ANGIOGRAPHY SEQUENCES DURING CONTRAST FLUID PROPAGATION BY IMAGE REGISTRATION. 2017-11-14 - 2017-11-16.
  • Meinich-Bache, Øyvind; Engan, Kjersti; Eftestøl, Trygve Christian; Austvoll, Ivar (2017). Detecting Chest Compression Depth Using a Smartphone Camera and Motion Segmentation. 2017-06-12 - 2017-06-14.
  • Urdal, Jarle; Engan, Kjersti; Eftestøl, Trygve Christian; Kidanto, Hussein; Yarrot, Ladislaus Blacy; Eilevstjønn, Joar; Ersdal, Hege Langli (2017). Signal Processing and Classification for Identification of Clinically Important Parameters During Neonatal Resuscitation. IEEE Signal Processing Society Malaysia Chapter; 2017-09-12 - 2017-09-14.
  • Eftestøl, Trygve Christian (2015). Biomedical data analysis. Norway Pumps & Pipes; 2015-10-01.
  • Eftestøl, Trygve Christian; Singsaas, Erlend; Engan, Kjersti; Woie, Leik; Ørn, Stein (2015). Automatic Detection of Microvascular Obstruction in Patients with Myocardial Infarction. Computing in Cardiology; 2015-09-06 - 2015-09-09.
  • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2015). Segmentation of LG Enhanced Cardiac MRI. Insticc; 2015-01-12 - 2015-01-15.
  • Vu, Huyen; Eftestøl, Trygve; Engan, Kjersti; Eilevstjønn, Joar; Linde, Jørgen Erland; Ersdal, Hege (2015). Exploratory Analysis of Ventilation Signals from Resuscitation Data of Newborns. Insticc; 2015-01-12 - 2015-01-15.
  • Eftestøl, Trygve; Måløy, Frode; Engan, Kjersti; Kotu, Lasya Priya; Woie, Leik; Ørn, Stein (2014). A Texture-based Probability Mapping for Localisation of Clinically Important Cardiac Segments in the Myocardium in Cardiac Magnetic Resonance Images from Myocardial Infarction Patients. IEEE; 2014-10-27 - 2014-10-30.
  • Engan, Kjersti; Woie, Leik; Eftestøl, Trygve (2014). Defining Angular and Radial Positions and Parameters for Myocardial Pixels in Cardiac MR Images. 2014-09-07 - 2014-09-10.
  • Huyen, Vu; Eftestøl, Trygve; Engan, Kjersti; Eilevstjønn, Joar; Linde, Jørgen Erland; Ersdal, Hege (2014). Exploratory Analysis of Heart Rate Changes in Newborns to Investigate the Effectiveness of Bag-Mask Ventilation. 2014-09-07 - 2014-09-10.
  • Rad, Ali Bahrami; Eftestøl, Trygve; Kvaløy, Jan Terje; Ayala, Unai; Kramer-Johansen, Jo; Engan, Kjersti (2014). Nearest-manifold classification approach for cardiac arrest rhythm interpretation during resuscitation. IEEE; 2014-05-04 - 2014-05-09.
  • Rad, Ali Bahrami; Eftestøl, Trygve; Kvaløy, Jan Terje; Ayala, Unai; Kramer-Johansen, Jo; Engan, Kjersti (2013). Probabilistic Classification Approaches for Cardiac Arrest Rhythm Interpretation during Resuscitation. 2013-09-22 - 2013-09-25.
  • Eftestøl, Trygve (2013). Signal and image processing projects in the biomedical data analysis research group. Mathematics/Physics group, University of Stavanger; 2013-11-25 - 2013-11-27.
  • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Woie, Leik; Schuchter, Arthur; Ørn, Stein (2013). Automatic Detection of Heart Center in Late Gadolinium Enhanced MRI. 2013-09-25 - 2013-09-28.
  • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2013). Automatic Segmentation of the Epicardium in Late Gadolinium Enhanced Cardiac MR Images. 2013-09-22 - 2013-09-25.
  • Måløy, Frode; Woie, Leik; Eftestøl, Trygve; Engan, Kjersti; Ørn, Stein (2013). Measuring the Degree of Fibrosity of Myocardial Scars from Late Gadolinium- Enhanced Cardiovascular Magnetic Resonance Images. 2013-09-22 - 2013-09-25.
  • Ayala, U; Aramendi, Elisabete; Irusta, Unai; Alonso, E; gonzales-otero, digna; Eftestøl, Trygve; Kramer-Johansen, Jo; Ingason, Andres (2012). Recommendations of the American Heart Association on the rhythm library specifications for the development of shock advice algorithms: Do they reflect the real scenario?.
  • de Gauna, Sofia Ruiz; gonzales-otero, digna; Ruiz, Jesus; Ayala, U; Alonso, E; Eftestøl, Trygve; Kramer-Johansen, Jo (2012). Is rhythm analysis during chest compression pauses for ventilation feasible?.
  • Eftestøl, Trygve (2012). Chest compressions: The good, the bad and the ugly.
  • Eftestøl, Trygve; Kvaløy, Jan Terje; Nilsen, Dennis W.T.; Woie, Leik (2012). Analysis of Intracardiac Electrogram Changes. Computing in Cardiology; 2012-09-09 - 2012-09-12.
  • Eftestøl, Trygve; Woie, Leik; Engan, Kjersti; Kvaløy, Jan Terje; Nilsen, Dennis W.T.; Ørn, Stein (2012). Texture Analysis to Assess Risk of Serious Arrhythmias after Myocardial Infarction. Computing in Cardiology; 2012-09-09 - 2012-09-12.
  • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Woie, Leik; Ørn, Stein; Katsaggelos, Aggelos (2012). LOCAL BINARY PATTERNS USED ON CARDIAC MRI TO CLASSIFY HIGH AND LOW RISK PATIENT GROUPS. European Association for Signal, Speech, and Image Processin; 2012-08-27 - 2012-08-31.
  • Oppedal, Ketil; Engan, Kjersti; Aarsland, Dag; Beyer, Mona Kristiansen; Tysnes, Ole-Bjørn; Eftestøl, Trygve (2012). Using local binary pattern to classify dementia in MRI. IEEE EMB; 2012-05-02 - 2012-05-05.
  • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2011). Segmentation of Scarred and Non-Scarred Myocardium in LG Enhanced CMR Images using Intensity-Based Textural Analysis. IEEE Engineering in Medecine and biology society; 2011-08-30 - 2011-09-03.
  • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2011). TEXTURE CLASSIFICATION OF SCARRED AND NON-SCARRED MYOCARDIUM IN CARDIAC MRI USING LEARNED DICTIONARIES. IEEE signal processing society; 2011-09-11 - 2011-09-14.
  • Nordseth, Trond; Edelson, Dana P.; Bergum, Daniel; Olasveengen, Theresa Mariero; Eftestøl, Trygve; Abella, Benjamin; Skogvoll, Eirik (2011). Optimal CPR Loop Duration for Asystole and Pulseless Electrical Activity During In-Hospital Cardiac Arrest.
  • Nordseth, Trond; Edelson, DP; Bergum, Daniel; Olasveengen, Theresa Mariero; Eftestøl, Trygve; Abella, Ben; Skogvoll, Eirik (2011). Optimal CPR Loop Duration for Asystole and PEA during In-Hospital Cardiac Arrest. American Heart Association; 2011-11-12 - 2011-11-13.
  • Nordseth, Trond; Edelson, DP; Bergum, Daniel; Olasveengen, Theresa Mariero; Eftestøl, Trygve; Abella, Ben; Skogvoll, Eirik (2011). Prevalence and Development of Clinical States during In-Hospital Cardiac Arrest. American Heart Association; 2011-11-12 - 2011-11-13.
  • Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Kvaløy, Jan Terje; Woie, Leik (2010). Exploratory Data Analysis of Image Texture and Statistical Features on Myocardium and Infarction Areas in Cardiac Magnetic Resonance Images. 2010-08-31 - 2010-09-04.
  • Kvaløy, Jan Terje; Skogvoll, Eirik; Eftestøl, Trygve; Gundersen, Kenneth; Kramer-Johansen, Jo; Olasveengen, Theresa Mariero; Steen, Petter Andreas (2010). Analysing clinical state transitions during cardiopulmonary resuscitation. 2010-08-29 - 2010-09-02.
  • Pampanin, D.M.; Ravagnan, E.; Apeland, S.; Aarab, N.; Godal, B.F.; Westerlund, S.; Hjermann, Dag Øystein; Eftestøl, Trygve; Budka, M.; Gabrys, B.; Viarengo, A.; Barsiene, J. (2010). The marine environment IQ concept Developing an index of the quality of the marine environment based on biomarkers: Integration of pollutant effects on marine organisms.
  • Eftestøl, Trygve (2009). Controlling true positive rate in ROC analysis. 2009-09-13 - 2009-09-16.
  • Kjosmoen, Thomas; Ryen, Tom; Eftestøl, Trygve (2009). Exploring the combinatorics of motif alignments for accurately computing E-values from p-values. 2009-04-28 - 2009-04-30.
  • Thorsen, Kari Anne Haaland; Eftestøl, Trygve; Rong, Chunming; Steen, Petter Andreas (2009). An Integrated Information Sharing Structure for Resuscitation Data. 2009-05-26 - 2009-05-29.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Eftestøl, Trygve (2008). Using ECG-analysis to quantify the effect of increasing pre-shock pauses in chest compressions on the probability of ROSC.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Olasveengen, Theresa Mariero; Eftestøl, Trygve (2008). The effect of using within-patient correlation to improve shock outcome prediction.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Olasveengen, Theresa Mariero; Eilevstjønn, Joar; Eftestøl, Trygve (2008). The effect of using within-patient correlation to improve shock outcome prediction. 2008-05-22 - 2008-05-24.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Steen, Petter Andreas; Eftestøl, Trygve (2008). Using ECG-analysis to quantify the effect of increasing pre-shock pauses in chest compressions on the probability of ROSC. 2008-05-22 - 2008-05-24.
  • Kvaløy, Jan Terje; Skogvoll, Eirik; Eftestøl, Trygve; Gundersen, Kenneth; Kramer-Johansen, Jo; Olasveengen, Theresa Mariero; Steen, Petter Andreas (2008). Identifying factors influencing clinical state transitions in cardiac arrest resuscitation.
  • Woie, L.; Eftestøl, Trygve; Kvaløy, Jan Terje; Aarsland, Torbjørn; Tjelta, K.; Nilsen, DWT (2008). Intracardiac electrocardiographic (EGM) morphology changes in patients with implantable cardioverter defibrillator (ICD). 2008-05-18 - 2008-05-21.
  • Woie, L.; Eftestøl, Trygve; Kvaløy, Terje Jan; Aarsland, Torbjørn; Tjelta, K.; Nilsen, DWT (2008). Intracardiac electrocardiographic (EGM) morphology changes in patients with implantable cardioverter defibrillator (ICD).
  • Eftestøl, Trygve (2008). Signal processing and analysis of data from therapy of cardiac arrest patients. Simula Research Laboratory, Center for Biomedical Computing; 2008-12-10.
  • Johansen, Øystein; Ryen, Tom; Eftestøl, Trygve; Kjosmoen, Thomas; Ruoff, Peter (2008). Splice Site Prediction using Artificial Neural Networks. 2008-10-03 - 2008-10-04.
  • Olasveengen, Theresa Mariero; Eftestøl, Trygve; Gundersen, Kenneth; Steen, Petter Andreas; Wik, Lars; Sunde, Kjetil (2008). Ventricular fibrillation characteristics are different in patients with coronary heart disease compared to patients with a primary arrhythmia.
  • Eftestøl, Trygve (2007). A research experience in bioengineering in Norway. 2007-07-05 - 2007-07-06.
  • Eftestøl, Trygve (2007). Signal processing and pattern recognition in resuscitation science. 2007-07-05 - 2007-07-06.
  • Eftestøl, Trygve; Skogvoll, Eirik; Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Steen, Petter Andreas (2006). Information structuring and symbolic representation for analysis of resuscitation data. 2006-06-07 - 2006-06-09.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Eftestøl, Trygve; Steen, Petter Andreas; Kramer-Johansen, Jo; Wik, Lars; Sterz, Fritz; Losert, Heidrun; Aase, Sven Ole (2006). Improved shock outcome prediction from a random model.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Eftestøl, Trygve; Steen, Petter Andreas; Kramer-Johansen, Jo; Wik, Lars; Sterz, Fritz; Losert, Heidrun; Aase, Sven Ole (2006). Random effects in shock outcome prediction.
  • Gundersen, Kenneth; Kvaløy, Jan Terje; Eftestøl, Trygve; Steen, Petter Andreas; Kramer-Johansen, Jo; Wik, Lars; Sterz, Fritz; Losert, Heidrun; Aase, Sven Ole (2006). Random effects in shock outcome prediction. 2006-05-10 - 2006-05-13.
  • Kvaløy, Jan Terje; Eftestøl, Trygve; Gundersen, Kenneth; Skogvoll, Eirik; Kramer-Johansen, Jo; Steen, Petter Andreas (2006). Analysis of factors influencing clinical state transitions in cardiac arrest.
  • Skogvoll, Eirik; Eftestøl, Trygve; Gundersen, Kenneth; Kvaløy, Jan Terje; Kramer-Johansen, Jo; Steen, Petter Andreas (2006). The dynamics of cardiac arrest - clinical state transitions during CPR. 2006-05-10 - 2006-05-13.
  • Dragsund, Inge; Gundersen, Kenneth; Risdal, Martin; Kramer-Johansen, Jo; Abella, Ben; edelson, dana; Sterz, Fritz; Eftestøl, Trygve (2006). Analysing the dynamics of pulseless electrical activity during cardiopulmonary resuscitation. 2006-09-17 - 2006-09-20.
  • Eftestøl, Trygve (2006). Matematikk på liv og død?. 2006-11-29.
  • Eftestøl, Trygve (2006). Waveform analysis - the way to improve survival?. 2006-05-10 - 2006-05-13.
  • Eftestøl, Trygve; Ryen, Tom; Aase, Sven Ole; Strässle, Cassian; Boos, Marcus; Schuster, Guido M.; Ruoff, Peter (2006). Eukaryotic gene prediction by spectral analysis and pattern recognition techniques. 2006-06-07 - 2006-06-09.
  • Neurauter, Andreas; Eftestøl, Trygve; Kramer-Johansen, Jo; Wenzel, Volker; Lindner, Karl; Eilevstjønn, Joar; Myklebust, Helge; Steen, Petter Andreas; Strohmenger, Hans Ulrich (2006). Prediction of countershock success employing single feature analysis from ventricular fibrillation power bands or feature combination using neural networks.
  • Risdal, Martin; Losert, Heidrun; Sterz, Fritz; Aase, Sven Ole; Eftestøl, Trygve (2006). Using thoracic impedance for identification of return of spontaneous circulation during resuscitation. 2006-06-07 - 2006-06-09.
  • Risdal, Martin; Steen, Petter Andreas; Kramer-Johansen, Jo; Wik, Lars; Sterz, Fritz; Losert, Heidrun; Aase, Sven Ole; Eftestøl, Trygve (2006). Discriminating between PEA and pulse circulating rhythm using ECG.
  • Eftestøl, Trygve (2005). Signalbehandling og mønstergjenkjenning innen akuttmedisin. 2005-09-22.
  • Eftestøl, Trygve; Risdal, Martin; Eilevstjønn, Joar; Steen, Petter Andreas (2005). Advanced life support therapy on out-of-hospital cardiac arrest patients: Applying signal processing and pattern recognition methods.
  • Risdal, Martin; Aase, Sven Ole; Eftestøl, Trygve (2005). Arbitrary feature space dimensionality reduction with focus on loss of discrimination for two-class problems. 2005-09-22 - 2005-09-24.
  • Risdal, Martin; Aase, Sven Ole; Eftestøl, Trygve (2005). Examining the Potential of Using Thorax Impedance Measured by Automated External Defibrillators for Quantification of Circulation. 2005-09-25 - 2005-09-28.
  • Risdal, Martin; Eftestøl, Trygve; Aase, Sven Ole; Steen, Petter Andreas; Sleveland, Tone; Wik, Lars; Kramer-Johansen, Jo; Sterz, Fritz; Losert, Heidrun (2005). Improving rhythm classification using electrocardiogram and thorax impedance recorded by automated external defibrillators. 2005-09-22 - 2005-09-24.
  • Risdal, Martin; Losert, Heidrun; Nysæther, Jon; Aase, Sven Ole; Sterz, Fritz; Eftestøl, Trygve (2005). NON-INVASIVE VENTILATION MONITORING DURING CARDIOPULMONARY RESUSCITATION BY MEANS OF THORACIC IMPEDANCE. 2005-11-20 - 2005-11-25.
  • Risdal, Martin; Losert, Heidrun; Nysæther, Jon; Aase, Sven Ole; Sterz, Fritz; Eftestøl, Trygve (2005). VENTILATION CLASSIFICATION FOR CARDIOPULMONARY RESUSCITATION QUALITY MONITORING USING THORACIC IMPEDANCE. 2005-11-20 - 2005-11-25.
  • Risdal, Martin; Stavland, Mette; Aase, Sven Ole; Eftestøl, Trygve (2005). IMPEDANCE-BASED VENTILATION DETECTION DURING CARDIOPULMONARY RESUSCITATION USING A NEURAL NETWORK. 2005-11-20 - 2005-11-25.
  • Eftestøl, Trygve; Wik, Lars; Sunde, Kjetil; Steen, Petter Andreas (2004). CPR causes changes in predictors of VF defibrillation success during out-of-hospital cardiac arrest. 2004-09-08 - 2004-09-11.
  • Eilevstjønn, Joar; Eftestøl, Trygve; Kramer-Johansen, Jo; Steen, Petter Andreas (2004). Reducing the no flow time in automated external defibrillation. 2004-09-08 - 2004-09-11.
  • Watson, Jamie; Uchaipichat, Nopadol; Addison, Paul S; Clegg, Gareth R; Robertson, Colin; Eftestøl, Trygve; Steen, Petter Andreas (2004). Novel wavelet transform methods predict defibrillation success for out-of-hospital cardiac arrest. 2004-09-08 - 2004-09-11.
  • Eftestøl, Trygve (2003). Ingeniøren, kan de hjelpe oss? Engineers - can they help us?. 2003-09-04 - 2003-09-06.
  • Eilevstjønn, Joar; Eftestøl, Trygve; Steen, Petter Andreas (2003). Reducing The Hands-Off Interval By Filtering CPR Artefacts In ECG. 2003-09-04 - 2003-09-06.
  • Addison, Paul S; Uchaipichat, Nopadol; Watson, Jamie; Clegg, Gareth R; Robertson, Colin; Steen, Petter Andreas; Eftestøl, Trygve (2002). Positional Depedence of Time-Frequency Information in the Electrocardiograph used for the Prediction of Successful Defibrillation. 2002-12-04 - 2002-12-08.
  • Eftestøl, Trygve; Sunde, Kjetil; Steen, Petter Andreas (2002). The effects of interrupting precordial compressions on the calculated probability of defibrillation success in out-of-hospital cardiac arrest patients. 2002-10-02 - 2002-10-05.
  • Eilevstjønn, Joar; Husøy, John Håkon; Eftestøl, Trygve; Aase, Sven Ole; Steen, Petter Andreas (2002). Multichannel adaptive filtering using an efficient matching pursuit-like algorithm for removal of CPR artifacts in ECG signals. 2002-05-13 - 2002-05-17.
  • Uchaipichat, Nopadol; Addison, Paul S; Watson, Jamie; Clegg, Gareth R; Robertson, Colin; Steen, Petter Andreas; Eftestøl, Trygve (2002). Wavelet Power Spectrum Analysis of Cardiac Arrhythmias: Ventricular Fibrillation. 2002-11-22 - 2002-11-23.
  • Uchaipichat, Nopadol; Watson, Jamie; Addison, Paul S; Clegg, Gareth R; Robertson, Colin; Steen, Petter Andreas; Eftestøl, Trygve (2002). Optimal pre-shock signal length for time-frequency classification used in the predicition of successful defibrillation. 2002-12-04 - 2002-12-07.
  • Addison, Paul S; Uchaipichat, Nopadol; Watson, Jamie; Clegg, Gareth R; Robertson, Colin; Steen, Petter Andreas; Eftestøl, Trygve (2001). Wavelet power spectrum-based prediction of successful defibrillation from ventricular fibrillation. 2001-10-25 - 2001-10-28.
  • Sunde, Kjetil; Eftestøl, Trygve; Askenberg, Christian; Steen, Petter Andreas (2001). Kvalitetsvurdering av avansert hjerte-lunge-redning i ambulansetjenesten i Oslo ved analysering av defibrillatorens datamodul.
  • Sunde, Kjetil; Eftestøl, Trygve; Steen, Petter Andreas (2001). Prehospital hjertestans - resultater etter to års Utstein-registrering ved ambulansetjenesten i Oslo.
  • Aase, Sven Ole; Husøy, John Håkon; Eftestøl, Trygve (2000). Optimum CPR artefact removal in human ECG signals. 2000-06-26 - 2000-06-28.
  • Eftestøl, Trygve; Aase, Sven Ole; Husøy, John Håkon (2000). A method for detection of signal harmonics in the spectrum.
  • Eftestøl, Trygve; Aase, Sven Ole; Husøy, John Håkon (2000). Spectral characterization of ECG in out-of-hospital cardiac arrest patients.
  • Eftestøl, Trygve; Sunde, Kjetil; Aase, Sven Ole; Husøy, John Håkon; Steen, Petter Andreas (2000). Monitoring the "probability of successful defibrillation" during CPR in out-of-hospital cardiac arrested patients.
  • Eftestøl, Trygve; Sunde, Kjetil; Aase, Sven Ole; Husøy, John Håkon; Steen, Petter Andreas (2000). Predicting defibrillation outcome from VF-characteristics in out-of-hospital cardiac arrest.
  • Sunde, Kjetil; Eftestøl, Trygve; Steen, Petter Andreas (2000). Survival rate depends on place of collapse in patients with out-of-hospital cardiac arrest in Oslo.
  • Eftestøl, Trygve; Aase, Sven Ole; Husøy, John Håkon (1999). Characterisation og changes in cardiac arrhythmias using spectral parameters.
  • Eftestøl, Trygve; Aase, Sven Ole; Husøy, John Håkon (1999). Spectral flatness measure for characterising changes in cardiac arrhythmias.
  • Eftestøl, Trygve; Aase, Sven Ole; Husøy, John Håkon; Chang, H. K.; Zhang, Y. T. (1999). A flexible pattern recognition system for analysis of ECG and related demographics and annotations.
  • Eftestøl, Trygve; Øien, G.E. (1998). ECG rhythm classification using artificial neural networks.