Robert G Walker

Summary

Affiliation: Medtronic Inc
Country: USA

Publications

  1. doi Defibrillation probability and impedance change between shocks during resuscitation from out-of-hospital cardiac arrest
    Robert G Walker
    Physio Control Inc A Division of Medtronic, Redmond, WA 98052, USA
    Resuscitation 80:773-7. 2009
  2. ncbi Comparison of six clinically used external defibrillators in swine
    Robert G Walker
    Medtronic Physio Control Corporation, 11811 Willows Road NE, 98073 9706, Redmond, WA, USA
    Resuscitation 57:73-83. 2003
  3. ncbi A percutaneous catheter-based system for the measurement of potential gradients applicable to the study of transthoracic defibrillation
    John P Rosborough
    Department of Emergency Medicine, Harbor UCLA Medical Center, Torrance, California 90509, USA
    Pacing Clin Electrophysiol 30:166-74. 2007
  4. ncbi Better outcome after pediatric defibrillation dosage than adult dosage in a swine model of pediatric ventricular fibrillation
    Robert A Berg
    University of Arizona Steele Memorial Children s Research Center, Tucson, Arizona, USA
    J Am Coll Cardiol 45:786-9. 2005
  5. ncbi Intracardiac voltage gradients during transthoracic defibrillation: implications for postshock myocardial injury
    James T Niemann
    Harbor UCLA Medical Center, Department of Emergency Medicine, 1000 West Carson Street, Box 21, Torrance, CA 90509, USA
    Acad Emerg Med 12:99-105. 2005
  6. ncbi Defibrillation threshold and cardiac responses using an external biphasic defibrillator with pediatric and adult adhesive patches in pediatric-sized piglets
    Cheryl R Killingsworth
    Cardiac Rhythm Management Laboratory, Department of Medicine, Division of Cardiovascular Diseases, University of Alabama at Birmingham, 1670 University Boulevard, B140 Volker Hall, Birmingham, AL 35294, USA
    Resuscitation 55:177-85. 2002
  7. ncbi A model of ischemically induced ventricular fibrillation for comparison of fixed-dose and escalating-dose defibrillation strategies
    James T Niemann
    Department of Emergency Medicine, Harbor UCLA Medical Center, Torrance, CA 90509, USA
    Acad Emerg Med 11:619-24. 2004
  8. ncbi Attenuated adult biphasic shocks compared with weight-based monophasic shocks in a swine model of prolonged pediatric ventricular fibrillation
    Robert A Berg
    The University of Arizona Steele Memorial Children s Research Center, Tuscon, AZ 85724 5073, USA
    Resuscitation 61:189-97. 2004
  9. ncbi A randomized trial comparing monophasic and biphasic waveform shocks for external cardioversion of atrial fibrillation
    Rudolph W Koster
    Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    Am Heart J 147:e20. 2004
  10. ncbi Definition of successful defibrillation
    Rudolph W Koster
    Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
    Crit Care Med 34:S423-6. 2006

Detail Information

Publications13

  1. doi Defibrillation probability and impedance change between shocks during resuscitation from out-of-hospital cardiac arrest
    Robert G Walker
    Physio Control Inc A Division of Medtronic, Redmond, WA 98052, USA
    Resuscitation 80:773-7. 2009
    ..We analyzed technical data from a large case series to evaluate the change in transthoracic impedance between shocks, and to assess the heterogeneity of the probability of successful defibrillation across the population...
  2. ncbi Comparison of six clinically used external defibrillators in swine
    Robert G Walker
    Medtronic Physio Control Corporation, 11811 Willows Road NE, 98073 9706, Redmond, WA, USA
    Resuscitation 57:73-83. 2003
    ....
  3. ncbi A percutaneous catheter-based system for the measurement of potential gradients applicable to the study of transthoracic defibrillation
    John P Rosborough
    Department of Emergency Medicine, Harbor UCLA Medical Center, Torrance, California 90509, USA
    Pacing Clin Electrophysiol 30:166-74. 2007
    ..In this study we evaluated a multiple electrode, catheter-based device for closed-chest 3D measurements of E field from transthoracic defibrillation shocks...
  4. ncbi Better outcome after pediatric defibrillation dosage than adult dosage in a swine model of pediatric ventricular fibrillation
    Robert A Berg
    University of Arizona Steele Memorial Children s Research Center, Tucson, Arizona, USA
    J Am Coll Cardiol 45:786-9. 2005
    ..This study was designed to compare outcome after adult defibrillation dosing versus pediatric dosing in a piglet model of prolonged prehospital ventricular fibrillation (VF)...
  5. ncbi Intracardiac voltage gradients during transthoracic defibrillation: implications for postshock myocardial injury
    James T Niemann
    Harbor UCLA Medical Center, Department of Emergency Medicine, 1000 West Carson Street, Box 21, Torrance, CA 90509, USA
    Acad Emerg Med 12:99-105. 2005
    ..It is not clear how common descriptors of shock dose, e.g., joules (J), relate to VGs...
  6. ncbi Defibrillation threshold and cardiac responses using an external biphasic defibrillator with pediatric and adult adhesive patches in pediatric-sized piglets
    Cheryl R Killingsworth
    Cardiac Rhythm Management Laboratory, Department of Medicine, Division of Cardiovascular Diseases, University of Alabama at Birmingham, 1670 University Boulevard, B140 Volker Hall, Birmingham, AL 35294, USA
    Resuscitation 55:177-85. 2002
    ..These data suggest that there is a substantial safety margin above a DFT strength shock for this biphasic waveform in piglets...
  7. ncbi A model of ischemically induced ventricular fibrillation for comparison of fixed-dose and escalating-dose defibrillation strategies
    James T Niemann
    Department of Emergency Medicine, Harbor UCLA Medical Center, Torrance, CA 90509, USA
    Acad Emerg Med 11:619-24. 2004
    ..The authors hypothesized that a model of ischemically induced VF would exhibit heterogeneous defibrillation shock strength requirements and that an escalating-dose strategy would more effectively achieve prompt defibrillation...
  8. ncbi Attenuated adult biphasic shocks compared with weight-based monophasic shocks in a swine model of prolonged pediatric ventricular fibrillation
    Robert A Berg
    The University of Arizona Steele Memorial Children s Research Center, Tuscon, AZ 85724 5073, USA
    Resuscitation 61:189-97. 2004
    ..To compare the safety and efficacy of attenuated adult biphasic shocks with standard monophasic weight-based shocks in a piglet model of prolonged prehospital ventricular fibrillation (VF)...
  9. ncbi A randomized trial comparing monophasic and biphasic waveform shocks for external cardioversion of atrial fibrillation
    Rudolph W Koster
    Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    Am Heart J 147:e20. 2004
    ..We compared efficacy of and pain felt after biphasic truncated exponential (BTE) and monophasic damped sine (MDS) shocks in patients undergoing external cardioversion of atrial fibrillation (AF)...
  10. ncbi Definition of successful defibrillation
    Rudolph W Koster
    Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
    Crit Care Med 34:S423-6. 2006
    ..We evaluated a different defibrillation success criterion to determine whether it could provide additional insight into the relative performance of different defibrillation shocks...
  11. ncbi Biphasic shocks compared with monophasic damped sine wave shocks for direct ventricular defibrillation during open heart surgery
    Birgit Schwarz
    Department of Anesthesiology and Critical Care Medicine, University of Innsbruck, Austria
    Anesthesiology 98:1063-9. 2003
    ..This prospective, blinded, randomized clinical study compares biphasic and monophasic shock effectiveness and establishes intraoperative energy dose-response curves...
  12. ncbi BIPHASIC Trial: a randomized comparison of fixed lower versus escalating higher energy levels for defibrillation in out-of-hospital cardiac arrest
    Ian G Stiell
    Department of Emergency Medicine, Ottawa Health Research Institute, University of Ottawa, Ontario, Canada, K1Y 4E9
    Circulation 115:1511-7. 2007
    ..The present study compared fixed lower- and escalating higher-energy regimens for out-of-hospital cardiac arrest...
  13. ncbi Efficacy of lower-energy biphasic shocks for transthoracic defibrillation: a follow-up clinical study
    Steven L Higgins
    Scripps Memorial Hospital, La Jolla, California 92037, USA
    Prehosp Emerg Care 8:262-7. 2004
    ....