P Langley

Summary

Affiliation: University of Newcastle
Country: UK

Publications

  1. doi request reprint Accuracy of algorithms for detection of atrial fibrillation from short duration beat interval recordings
    P Langley
    Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
    Med Eng Phys 34:1441-7. 2012
  2. doi request reprint Circadian variation of human ventricular fibrillation dominant frequency
    Philip Langley
    Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, NE7 7DN, UK
    Resuscitation 81:950-5. 2010
  3. doi request reprint Principal component analysis as a tool for analyzing beat-to-beat changes in ECG features: application to ECG-derived respiration
    Philip Langley
    Cardiovascular Physics and Engineering Research Group, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE7 7DN, UK
    IEEE Trans Biomed Eng 57:821-9. 2010
  4. ncbi request reprint Quantification of T wave shape changes following exercise
    Philip Langley
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, United Kingdom
    Pacing Clin Electrophysiol 25:1230-4. 2002
  5. doi request reprint Spatial and temporal organization of the dominant frequencies in the fibrillating heart: body surface potential mapping in a rare case of sustained human ventricular fibrillation
    P Langley
    Cardiovascular Physics and Engineering Group, Medical Physics Department, Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK
    Europace 11:324-7. 2009
  6. ncbi request reprint Comparison of atrial signal extraction algorithms in 12-lead ECGs with atrial fibrillation
    Philip Langley
    Cardiovascular Physics and Engineering Research Group, Medical Physics Department, Freeman Hospital, University of Newcastle upon Tyne, UK
    IEEE Trans Biomed Eng 53:343-6. 2006
  7. 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
  8. 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
  9. ncbi request reprint Surface atrial frequency analysis in patients with atrial fibrillation: assessing the effects of linear left atrial ablation
    Dan Raine
    Department of Cardiology, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Trust, UK D T
    J Cardiovasc Electrophysiol 16:838-44. 2005
  10. ncbi request reprint Surface atrial frequency analysis in patients with atrial fibrillation: a tool for evaluating the effects of intervention
    Dan Raine
    Department of Academic Cardiology, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Trust, Newcastle upon Tyne, United Kingdom
    J Cardiovasc Electrophysiol 15:1021-6. 2004

Detail Information

Publications17

  1. doi request reprint Accuracy of algorithms for detection of atrial fibrillation from short duration beat interval recordings
    P Langley
    Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
    Med Eng Phys 34:1441-7. 2012
    ..AF detection algorithms are effective for short analysis durations, offering the prospect of a simple and rapid diagnostic test based on beat intervals alone...
  2. doi request reprint Circadian variation of human ventricular fibrillation dominant frequency
    Philip Langley
    Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, NE7 7DN, UK
    Resuscitation 81:950-5. 2010
    ..If present this would provide evidence of physiological influence on VF. The objective was to quantify the circadian variation in human VF dominant frequency...
  3. doi request reprint Principal component analysis as a tool for analyzing beat-to-beat changes in ECG features: application to ECG-derived respiration
    Philip Langley
    Cardiovascular Physics and Engineering Research Group, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE7 7DN, UK
    IEEE Trans Biomed Eng 57:821-9. 2010
    ..0001, respectively) but were not significantly different from the amplitude algorithm. PCA provides a novel algorithm for analysis of both respiratory and nonrespiratory related beat-to-beat changes in different ECG features...
  4. ncbi request reprint Quantification of T wave shape changes following exercise
    Philip Langley
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, United Kingdom
    Pacing Clin Electrophysiol 25:1230-4. 2002
    ..Amplitude increases had returned to their reference values at 300 seconds. T wave shape was significantly more symmetrical at higher HRs. These findings confirm qualitative reports of shape changes...
  5. doi request reprint Spatial and temporal organization of the dominant frequencies in the fibrillating heart: body surface potential mapping in a rare case of sustained human ventricular fibrillation
    P Langley
    Cardiovascular Physics and Engineering Group, Medical Physics Department, Freeman Hospital, Newcastle upon Tyne NE7 7DN, UK
    Europace 11:324-7. 2009
    ..The aim of this study was to assess the spatial and temporal variability of dominant fibrillation frequencies in a rare case of sustained human ventricular fibrillation (VF)...
  6. ncbi request reprint Comparison of atrial signal extraction algorithms in 12-lead ECGs with atrial fibrillation
    Philip Langley
    Cardiovascular Physics and Engineering Research Group, Medical Physics Department, Freeman Hospital, University of Newcastle upon Tyne, UK
    IEEE Trans Biomed Eng 53:343-6. 2006
    ..Users of these algorithms should be observant of residual ventricular activities which can affect the analysis of the fibrillatory waveform in clinical practice...
  7. 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...
  8. 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...
  9. ncbi request reprint Surface atrial frequency analysis in patients with atrial fibrillation: assessing the effects of linear left atrial ablation
    Dan Raine
    Department of Cardiology, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Trust, UK D T
    J Cardiovasc Electrophysiol 16:838-44. 2005
    ..Such measurements are reproducible over time and change with drug manipulation of the arrhythmia...
  10. ncbi request reprint Surface atrial frequency analysis in patients with atrial fibrillation: a tool for evaluating the effects of intervention
    Dan Raine
    Department of Academic Cardiology, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Trust, Newcastle upon Tyne, United Kingdom
    J Cardiovasc Electrophysiol 15:1021-6. 2004
    ....
  11. ncbi request reprint Effect of lead exclusion for the manual measurement of QT dispersion
    P Langley
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, The United Kingdom
    Pacing Clin Electrophysiol 24:75-81. 2001
    ..01). Lead exclusion for QTd is important. Exclusion of the two smallest amplitude or two shortest QT leads from each subject produced the greatest differences between the normal and pathological groups...
  12. ncbi request reprint Comparison of automatic repolarization measurement techniques in the normal magnetocardiogram
    Fiona E Smith
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, The United Kingdom
    Pacing Clin Electrophysiol 26:2096-102. 2003
    ..25 Hz, -5.5 (5.3) ms for 0.5 Hz, and -17.1 (7.8) ms for 1 Hz. Automatic measurements of repolarization (QT) in the MCG differ between techniques and are influenced by filtering. These effects should be considered when comparing results...
  13. ncbi request reprint Errors in repolarization measurement using magnetocardiography
    Fiona E Smith
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, UK
    Pacing Clin Electrophysiol 25:1223-9. 2002
    ..The errors detected demonstrate the importance of a standard presentation for repolarization measurement in the MCG...
  14. ncbi request reprint Effect of changes in heart rate and in action potential duration on the electrocardiogram T wave shape
    Diego di Bernardo
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, UK
    Physiol Meas 23:355-64. 2002
    ..These results help to explain the T wave shape changes which occur when heart rate increases...
  15. ncbi request reprint Analysis of surface electrocardiograms in atrial fibrillation: techniques, research, and clinical applications
    Andreas Bollmann
    Department of Cardiology, Otto von Guericke University Magdeburg, Leipziger Str 44, 39120 Magdeburg, Germany
    Europace 8:911-26. 2006
    ..Different signal processing techniques have been suggested for identification of underlying AF pathomechanisms and prediction of therapy efficacy...
  16. ncbi request reprint Magnetocardiography for pharmacology safety studies requiring high patient throughput and reliability
    Uwe Steinhoff
    Department of Biosignals, Physikalisch Technische Bundesanstalt, Berlin, Germany
    J Electrocardiol 37:187-92. 2004
    ..The applicability of MCG for pre-clinical in-vivo studies is demonstrated by the ease of measurement in unrestrained non-anesthetized rabbits, guinea pigs, and hamsters....
  17. ncbi request reprint Effect of premature ventricular beats on manual and automatic repolarization measurements
    Stefania Vecchietti
    Biomedical Engineering Laboratory DEIS, University of Bologna, Bologna, Italy
    J Electrocardiol 37:181-9. 2004
    ..The ventricular ectopic beats resulted in an increase in the QT of the immediately following sinus beats. These results confirm the need to interpret QT measurements with care in the presence of ectopic beats...