Todd T Schlegel

Summary

Affiliation: NASA Ames Research Center
Country: USA

Publications

  1. pmc Accuracy of advanced versus strictly conventional 12-lead ECG for detection and screening of coronary artery disease, left ventricular hypertrophy and left ventricular systolic dysfunction
    Todd T Schlegel
    Human Adaptation and Countermeasures Division, NASA Johnson Space Center, Houston, TX, USA
    BMC Cardiovasc Disord 10:28. 2010
  2. ncbi request reprint Predicting motion sickness during parabolic flight
    Deborah L Harm
    Neurosciences Laboratory, NASA Johnson Space Center, Houston, TX 77058, USA
    Auton Neurosci 97:116-21. 2002
  3. ncbi request reprint Real-time 12-lead high-frequency QRS electrocardiography for enhanced detection of myocardial ischemia and coronary artery disease
    Todd T Schlegel
    Neuroautonomic Laboratory, NASA Johnson Space Center, Houston, Tex 77058, USA
    Mayo Clin Proc 79:339-50. 2004
  4. pmc New system for digital to analog transformation and reconstruction of 12-lead ECGs
    Roshni Kothadia
    National Space Biomedical Research Institute, Houston, TX, USA
    PLoS ONE 8:e61076. 2013
  5. pmc Vestibular effects on cerebral blood flow
    Jorge M Serrador
    Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA, USA
    BMC Neurosci 10:119. 2009
  6. ncbi request reprint Temporal and postural variation of 12-lead high-frequency QRS electrocardiographic signals in asymptomatic individuals
    Pamela K Douglas
    National Space Biomedical Research Institute, Houston, TX 77030, USA
    J Electrocardiol 39:259-65. 2006
  7. ncbi request reprint High-frequency QRS electrocardiogram predicts perfusion defects during myocardial perfusion imaging
    M Atiar Rahman
    MD Anderson Cancer Center, Houston, TX 77030, USA
    J Electrocardiol 39:73-81. 2006
  8. ncbi request reprint Effect of 30-min +3 Gz centrifugation on vestibular and autonomic cardiovascular function
    Todd T Schlegel
    Human Adaptation and Countermeasures Office, National Aeronautics and Space Administration, Lyndon B Johnson Space Center, Houston, TX 77058, USA
    Aviat Space Environ Med 74:717-24. 2003
  9. ncbi request reprint Month-to-month and year-to-year reproducibility of high frequency QRS ECG signals
    Niles J Batdorf
    National Space Biomedical Research Institute, National Aeronautics and Space Administration, Lyndon B Johnson Space Center, Houston, TX, USA
    J Electrocardiol 37:289-96. 2004
  10. ncbi request reprint The effect of signal averaging on the reproducibility and reliability of measures of T-wave morphology
    Bjorn H Batdorf
    National Space Biomedical Research Institute, Houston, TX 77030, USA
    J Electrocardiol 39:266-70. 2006

Collaborators

Detail Information

Publications20

  1. pmc Accuracy of advanced versus strictly conventional 12-lead ECG for detection and screening of coronary artery disease, left ventricular hypertrophy and left ventricular systolic dysfunction
    Todd T Schlegel
    Human Adaptation and Countermeasures Division, NASA Johnson Space Center, Houston, TX, USA
    BMC Cardiovasc Disord 10:28. 2010
    ..We hypothesized that a approximately 5-min resting 12-lead advanced ECG test ("A-ECG") that combined results from both the advanced and conventional ECG could more accurately screen for these conditions than strictly conventional ECG...
  2. ncbi request reprint Predicting motion sickness during parabolic flight
    Deborah L Harm
    Neurosciences Laboratory, NASA Johnson Space Center, Houston, TX 77058, USA
    Auton Neurosci 97:116-21. 2002
    ....
  3. ncbi request reprint Real-time 12-lead high-frequency QRS electrocardiography for enhanced detection of myocardial ischemia and coronary artery disease
    Todd T Schlegel
    Neuroautonomic Laboratory, NASA Johnson Space Center, Houston, Tex 77058, USA
    Mayo Clin Proc 79:339-50. 2004
    ..The real-time NASA HF QRS ECG software is being evaluated currently in multiple clinical settings in North America. We describe its potential usefulness in the diagnosis of myocardial ischemia and coronary artery disease...
  4. pmc New system for digital to analog transformation and reconstruction of 12-lead ECGs
    Roshni Kothadia
    National Space Biomedical Research Institute, Houston, TX, USA
    PLoS ONE 8:e61076. 2013
    ..By doing so, the system also ultimately allows for transmission of data collected on one manufacturer's 12-lead ECG hardware/software into that of any other...
  5. pmc Vestibular effects on cerebral blood flow
    Jorge M Serrador
    Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA, USA
    BMC Neurosci 10:119. 2009
    ..In this study, we tested the hypothesis that stimulation of the vestibular system, specifically the otoliths organs, would result in changes in cerebral blood flow...
  6. ncbi request reprint Temporal and postural variation of 12-lead high-frequency QRS electrocardiographic signals in asymptomatic individuals
    Pamela K Douglas
    National Space Biomedical Research Institute, Houston, TX 77030, USA
    J Electrocardiol 39:259-65. 2006
    ..We conclude that most measures of HF QRS ECG are sufficiently stable for routine continuous monitoring...
  7. ncbi request reprint High-frequency QRS electrocardiogram predicts perfusion defects during myocardial perfusion imaging
    M Atiar Rahman
    MD Anderson Cancer Center, Houston, TX 77030, USA
    J Electrocardiol 39:73-81. 2006
    ..We investigated the accuracy of 12-lead HF QRS ECG in detecting perfusion defects during adenosine tetrofosmin myocardial perfusion imaging (MPI)...
  8. ncbi request reprint Effect of 30-min +3 Gz centrifugation on vestibular and autonomic cardiovascular function
    Todd T Schlegel
    Human Adaptation and Countermeasures Office, National Aeronautics and Space Administration, Lyndon B Johnson Space Center, Houston, TX 77058, USA
    Aviat Space Environ Med 74:717-24. 2003
    ....
  9. ncbi request reprint Month-to-month and year-to-year reproducibility of high frequency QRS ECG signals
    Niles J Batdorf
    National Space Biomedical Research Institute, National Aeronautics and Space Administration, Lyndon B Johnson Space Center, Houston, TX, USA
    J Electrocardiol 37:289-96. 2004
    ..We conclude that 12-lead high frequency QRS electrocardiograms are sufficiently reproducible for clinical use...
  10. ncbi request reprint The effect of signal averaging on the reproducibility and reliability of measures of T-wave morphology
    Bjorn H Batdorf
    National Space Biomedical Research Institute, Houston, TX 77030, USA
    J Electrocardiol 39:266-70. 2006
    ..We conclude that signal averages consisting of more than 10 complexes (or more than 10 seconds worth of complexes) are required to produce reproducible and reliable values for TWR(rel) and TWR(abs)...
  11. ncbi request reprint Sedentary long-duration head-down bed rest and ECG repolarization heterogeneity
    Chris Sakowski
    University of Texas Medical Branch, Galveston, TX, USA
    Aviat Space Environ Med 82:416-23. 2011
    ..Based on prior observations of lengthening of the QTc interval during long-duration spaceflight, we hypothesized that abnormalities in ECG repolarization would also occur during long-duration HDBR...
  12. doi request reprint Detection of hypertrophic cardiomyopathy is improved when using advanced rather than strictly conventional 12-lead electrocardiogram
    Samara L Poplack Potter
    National Space Biomedical Research Institute and Baylor College of Medicine, Houston, TX, USA
    J Electrocardiol 43:713-8. 2010
    ....
  13. doi request reprint Diagnostic utility of the spatial versus individual planar QRS-T angles in cardiac disease detection
    Ryanne A Brown
    Baylor College of Medicine, Houston, TX, USA
    J Electrocardiol 44:404-9. 2011
    ..We compared the diagnostic utility of various planar QRS-T angles to that of the spatial QRS-T angle in detecting various cardiac diseases...
  14. ncbi request reprint Real-time multichannel system for beat-to-beat QT interval variability
    Vito Starc
    Institute of Physiology, School of Medicine, University of Ljubljana, Ljubljana 1104, Slovenia
    J Electrocardiol 39:358-67. 2006
    ....
  15. ncbi request reprint Medical monitoring during the NASA Artificial Gravity-Bed Rest Pilot Study
    Randal C Reinertson
    University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA
    J Gravit Physiol 14:P9-13. 2007
    ....
  16. ncbi request reprint High-frequency QRS electrocardiogram
    Elin Trägårdh
    Department of Clinical Physiology, Lund University Hospital, Lund, Sweden
    Clin Physiol Funct Imaging 27:197-204. 2007
    ....
  17. pmc Cerebral hypoperfusion precedes nausea during centrifugation
    Jorge M Serrador
    Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
    Aviat Space Environ Med 76:91-6. 2005
    ..The goal of this work was to determine if changes in cerebral blood flow precede the development of nausea in subjects susceptible to motion sickness...
  18. ncbi request reprint High-frequency electrocardiogram analysis in the ability to predict reversible perfusion defects during adenosine myocardial perfusion imaging
    Elin Trägårdh
    Department of Clinical Physiology, Lund University Hospital, Lund, Sweden
    J Electrocardiol 40:510-4. 2007
    ..The purpose of the present study was to try to reproduce those findings...
  19. ncbi request reprint Coronary artery disease alters ventricular repolarization dynamics in type 2 diabetes
    Bojan Vrtovec
    Division of Cardiology, Ljubljana University Medical Center, Ljubljana, Slovenia
    Pacing Clin Electrophysiol 28:S178-81. 2005
    ..18 +/- 7.45 ms versus 10.22 +/- 5.35 ms; P = 0.82). CAD increases VRD in patients with type 2 diabetes. Therefore, changes in ventricular repolarization in diabetic patients may be due to silent CAD rather than due to diabetes per se...
  20. ncbi request reprint Twelve-lead high-frequency QRS electrocardiography during anesthesia in healthy subjects
    Thomas N Spackman
    Department of Anesthesiology, Division of Cardiovascular Thoracic Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN, USA
    Anesth Analg 100:1043-7. 2005
    ..Additional study is needed to understand the potential of this monitoring technique for enhancing detection of myocardial ischemia in the anesthetized population...