Peter Van Leeuwen

Summary

Country: Germany

Publications

  1. doi request reprint Heart rate variability in the individual fetus
    Peter Van Leeuwen
    Grönemeyer Institute of Microtherapy, University of Witten Herdecke, Bochum, Germany Electronic address
    Auton Neurosci 178:24-8. 2013
  2. doi request reprint Automatic identification of fetal breathing movements in fetal RR interval time series
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University of Witten Herdecke, Germany
    Comput Biol Med 42:342-6. 2012
  3. pmc A quantitative comparison of different methods to detect cardiorespiratory coordination during night-time sleep
    Dirk Cysarz
    Department of Clinical Research, Gemeinschaftskrankenhaus Herdecke D 58313 Herdecke, Germany
    Biomed Eng Online 3:44. 2004
  4. pmc Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleep
    Henrik Bettermann
    Department of Clinical Research, Gemeinschaftskrankenhaus, 58313 Herdecke, Germany
    BMC Physiol 2:18. 2002
  5. ncbi request reprint Fetal heart rate variability and complexity in the course of pregnancy
    P van Leeuwen
    Department of Biomagnetism, Research and Development Center for Microtherapy EFMT, Bochum, Germany
    Early Hum Dev 54:259-69. 1999
  6. ncbi request reprint Increase in regularity of fetal heart rate variability with age
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University Witten Herdecke, Bochum, Germany
    Biomed Tech (Berl) 51:244-7. 2006
  7. ncbi request reprint Heart rate variability in the fetus: a comparison of measures
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, Bochum, Germany
    Biomed Tech (Berl) 52:61-5. 2007
  8. doi request reprint Quantification of cardiac magnetic field orientation during ventricular de- and repolarization
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, Bochum, Germany
    Phys Med Biol 53:2291-301. 2008
  9. doi request reprint Effect of prenatal antiarrhythmic treatment on cardiac function in a twin pregnancy
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, University of Witten Herdecke, Bochum, Germany
    Pacing Clin Electrophysiol 31:1213-7. 2008
  10. pmc Influence of paced maternal breathing on fetal-maternal heart rate coordination
    P van Leeuwen
    Department of Biomagnetism, Witten Herdecke University, 44799 Bochum, Germany
    Proc Natl Acad Sci U S A 106:13661-6. 2009

Detail Information

Publications30

  1. doi request reprint Heart rate variability in the individual fetus
    Peter Van Leeuwen
    Grönemeyer Institute of Microtherapy, University of Witten Herdecke, Bochum, Germany Electronic address
    Auton Neurosci 178:24-8. 2013
    ..Complexity measures such as ApEn may thus more consistently reflect prenatal developmental factors influencing cardiovascular regulation. ..
  2. doi request reprint Automatic identification of fetal breathing movements in fetal RR interval time series
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University of Witten Herdecke, Germany
    Comput Biol Med 42:342-6. 2012
    ..9%. The characteristics of automatically and visually identified episodes were very similar and corresponded the expected changes over gestation. The method is suited for easy and reliable identification of fetal breathing movements...
  3. pmc A quantitative comparison of different methods to detect cardiorespiratory coordination during night-time sleep
    Dirk Cysarz
    Department of Clinical Research, Gemeinschaftskrankenhaus Herdecke D 58313 Herdecke, Germany
    Biomed Eng Online 3:44. 2004
    ..Others use an heuristic approach, i.e. characteristic features of both time series, to develop appropriate bivariate methods...
  4. pmc Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleep
    Henrik Bettermann
    Department of Clinical Research, Gemeinschaftskrankenhaus, 58313 Herdecke, Germany
    BMC Physiol 2:18. 2002
    ..It is hypothesized that RSA pattern class recurrence over at least k heartbeats is strongly related with the intermittent phase coordination defined above...
  5. ncbi request reprint Fetal heart rate variability and complexity in the course of pregnancy
    P van Leeuwen
    Department of Biomagnetism, Research and Development Center for Microtherapy EFMT, Bochum, Germany
    Early Hum Dev 54:259-69. 1999
    ..They may be linked to the maturation of the autonomic nervous system and could aid in the timely identification of pathological conditions...
  6. ncbi request reprint Increase in regularity of fetal heart rate variability with age
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University Witten Herdecke, Bochum, Germany
    Biomed Tech (Berl) 51:244-7. 2006
    ..The results most likely reflect the influence of increasingly differentiated fetal behavioral states and transitions between them in association with fetal development...
  7. ncbi request reprint Heart rate variability in the fetus: a comparison of measures
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, Bochum, Germany
    Biomed Tech (Berl) 52:61-5. 2007
    ..Thus little is known about the interdependency of standard HRV measures prenatally...
  8. doi request reprint Quantification of cardiac magnetic field orientation during ventricular de- and repolarization
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, Bochum, Germany
    Phys Med Biol 53:2291-301. 2008
    ..Consideration of methodological and discriminatory advantages with respect to noninvasive diagnosis of CAD suggests that the centres-of-gravity method is the most suited one...
  9. doi request reprint Effect of prenatal antiarrhythmic treatment on cardiac function in a twin pregnancy
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, University of Witten Herdecke, Bochum, Germany
    Pacing Clin Electrophysiol 31:1213-7. 2008
    ....
  10. pmc Influence of paced maternal breathing on fetal-maternal heart rate coordination
    P van Leeuwen
    Department of Biomagnetism, Witten Herdecke University, 44799 Bochum, Germany
    Proc Natl Acad Sci U S A 106:13661-6. 2009
    ..Our approach opens up the chance to examine this interaction between independent but closely linked physiological systems...
  11. doi request reprint Modeling fetal--maternal heart-rate interaction
    Peter Van Leeuwen
    Department of Biomagnetism, Chair of Radiology and Microtherapy, University Witten Herdecke, Universitätsstr 142, 44799 Bochum, Federal Republic of Germany
    IEEE Eng Med Biol Mag 28:49-53. 2009
    ..The model results suggest that the low incidence of epochs found in the real data at low-breathing rates may be explained by heart-rate characteristics, but that the higher incidence at fast rates must be due to other factors...
  12. doi request reprint Changes in dipolar structure of cardiac magnetic field maps after ST elevation myocardial infarction
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University Witten Herdecke, Universitätsstrasse 142, Bochum, Germany
    Ann Noninvasive Electrocardiol 16:379-87. 2011
    ..Aim of this work was to examine the structure of cardiac magnetic field maps (MFM) during ventricular depolarization and repolarization in patients with acute ST elevation myocardial infarction (STEMI)...
  13. ncbi request reprint Identification of patients with coronary artery disease using magnetocardiographic signal analysis
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, Bochum, Germany
    Biomed Tech (Berl) 51:83-8. 2006
    ..This study examines several parameters that quantify spatial and temporal aspects of cardiac magnetic signals in CAD...
  14. ncbi request reprint Reproducibility and reliability of fetal cardiac time intervals using magnetocardiography
    P van Leeuwen
    Department of Biomagnetism, EFMT, Bochum, Germany
    Physiol Meas 25:539-52. 2004
    ..As fetal CTI may be of value in the identification of pathologies such as intrauterine growth retardation or fetal cardiac hypertrophy, their reliable estimation will be enhanced by strategies which take these factors into account...
  15. ncbi request reprint Changes in the frequency power spectrum of fetal heart rate in the course of pregnancy
    Peter Van Leeuwen
    Department of Biomagnetism, Research and Development Center for Microtherapy EFMT Bochum, Germany
    Prenat Diagn 23:909-16. 2003
    ..The aim of this study was to examine changes in the heart rate variability based on the frequency power spectrum of healthy fetuses during the second and third trimester of pregnancy...
  16. ncbi request reprint Spatial distribution of repolarization times in patients with coronary artery disease
    Peter Van Leeuwen
    Department of Biomagnetism, Research and Development Center for Microtherapy EFMT, Bochum, Germany
    Pacing Clin Electrophysiol 26:1706-14. 2003
    ....
  17. pmc Is there evidence of fetal-maternal heart rate synchronization?
    Peter Van Leeuwen
    Department of Biomagnetism, Research and Development Center for Microtherapy EFMT, Bochum, D 44799 Germany
    BMC Physiol 3:2. 2003
    ..The prenatal condition offers a unique possibility of examining physiological interaction between individuals. Goal of this work was to look for evidence of coordination between fetal and maternal cardiac systems...
  18. ncbi request reprint Gender-related changes in magnetocardiographically determined fetal cardiac time intervals in intrauterine growth retardation
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute of Microtherapy, University Witten Herdecke, 44799 Bochum, Germany
    Pediatr Res 59:820-4. 2006
    ..On the other hand, the gender-specific differences, particularly in the IUGR fetuses may be due to hormonal factors...
  19. doi request reprint Diagnosis, treatment, observation and outcome of fetal supraventricular tachycardia in a twin pregnancy
    Sven Schiermeier
    Department of Obstetrics, University of Witten Herdecke, Marien Hospital, Witten, Germany
    Fetal Diagn Ther 24:327-30. 2008
    ..Magnetocardiography and M-mode fetal echocardiography are non-invasive techniques capable of identifying fetal arrhythmias. The STAN-fetal scalp electrode system can record the fetal echocardiogram in labor...
  20. doi request reprint Symbolic patterns of heart rate dynamics reflect cardiac autonomic changes during childhood and adolescence
    Dirk Cysarz
    Integrated curriculum for Anthroposophic Medicine, University of Witten Herdecke, Germany Chair for Theory of Medicine, Integrative and Anthroposophic Medicine, University of Witten Herdecke, Germany Electronic address
    Auton Neurosci 178:37-43. 2013
    ..As many binary patterns are linked to sympathetic or parasympathetic modulations of the autonomic nervous system e.g. spectral analysis of HRV may be complemented by this kind of analysis...
  21. ncbi request reprint Magnetoneurographic registration of propagating magnetic fields in the lumbar spine after stimulation of the posterior tibial nerve
    Anita Klein
    Grönemeyer Institute for Microtherapy, University of Witten Herdecke, Bochum, Germany
    J Neural Eng 3:125-31. 2006
    ..Dipole localization based on an equivalent current dipole model allowed a basic evaluation of the plausibility of the measurements with respect to the processes being examined...
  22. pmc Unexpected course of nonlinear cardiac interbeat interval dynamics during childhood and adolescence
    Dirk Cysarz
    Integrated curriculum for Anthroposophic Medicine, University of Witten Herdecke, Witten, Germany
    PLoS ONE 6:e19400. 2011
    ....
  23. doi request reprint Heart rate features in fetal behavioural states
    Silke Lange
    Department of Biomagnetism, Chair of Radiology and Microtherapy, University Witten Herdecke, Bochum, Germany
    Early Hum Dev 85:131-5. 2009
    ..The aim of this work was to determine whether behavioural states can be distinguished on the basis of heart rate features alone using high resolution beat-to-beat fetal magnetocardiography...
  24. doi request reprint Fetal electrocardiographic measurements in the assessment of fetal heart rate variability in the antepartum period
    Peter Van Leeuwen
    Department of Biomagnetism, Grönemeyer Institute for Microtherapy, University of Witten Herdecke, Universitätsstr 142, D 44799 Bochum, Germany
    Physiol Meas 35:441-54. 2014
    ..However, measures that quantify short-term beat-to-beat HRV will be compromised due to possible recurring inappropriate detection of single R-peaks. ..
  25. ncbi request reprint Recommended standards for fetal magnetocardiography
    Barbara Grimm
    Department of Obstetrics, Friedrich Schiller University, Jena, Germany
    Pacing Clin Electrophysiol 26:2121-6. 2003
    ..This article provides recommended standards for FMCG in the fields of data acquisition and data analysis...
  26. ncbi request reprint Application of decorrelation-independent component analysis to biomagnetic multi-channel measurements
    Tilmann H Sander
    Physikalisch Technische Bundesanstalt, Berlin, Germany
    Biomed Tech (Berl) 52:130-6. 2007
    ..Here the time-delayed decorrelation-independent component analysis algorithm is applied to exemplary magnetocardiographic and magnetoencephalographic data and the successful signal separation is demonstrated...
  27. ncbi request reprint The value of magnetocardiography in patients with and without relevant stenoses of the coronary arteries using an unshielded system
    Birgit Hailer
    Department of Medicine, Philippusstift, Essen, Germany
    Pacing Clin Electrophysiol 28:8-16. 2005
    ..The present study aimed to analyze the diagnostic value of an unshielded four-channel MCG for the detection of coronary artery disease (CAD) in patients with chest pain...
  28. ncbi request reprint The value of magnetocardiography in the course of coronary intervention
    Birgit Hailer
    Department of Medicine, Philippusstift, Essen, Germany
    Ann Noninvasive Electrocardiol 10:188-96. 2005
    ..Previous studies have shown that magnetocardiograms reveal obvious changes in patients with coronary artery disease (CAD) and normal electrocardiogram (ECG) at rest...
  29. ncbi request reprint Comparison of magnetocardiography and electrocardiography
    Fiona E Smith
    Medical Physics Department, Freeman Hospital Unit, Newcastle upon Tyne, UK
    Anadolu Kardiyol Derg 7:20-2. 2007
    ..Automated techniques were developed for the measurement of cardiac repolarisation using magnetocardiography...
  30. ncbi request reprint Comparison of magnetocardiography and electrocardiography: a study of automatic measurement of dispersion of ventricular repolarization
    Fiona E Smith
    Medical Physics Department, Freeman Hospital Unit, University of Newcastle upon Tyne, High Heaton, Newcastle upon Tyne NE7 7DN, UK
    Europace 8:887-93. 2006
    ..For this study, magnetocardiography and electrocardiography were compared from automatic measurements of dispersion of ventricular repolarization...