TY - GEN
T1 - Effect of body characteristics on thoracic attenuation of intra-cardiac electrical activity recorded on the surface electrocardiogram
AU - Ng, J.
AU - Subacius, H.
AU - Johnson, D.
AU - Kadish, A. H.
AU - Goldberger, J. J.
PY - 2005
Y1 - 2005
N2 - The objective of this study was to determine the effect of body characteristics on the electrical transfer function of the human thorax. Twenty patients undergoing electrophysiologic study were enrolled. Unipolar stimuli were applied in the right ventricular apical and posterioseptal areas. XYZ surface ECGs and unipolar intra-cardiac electrograms of the pacing impulses were recorded and signal-averaged. The intracardiac-to-surface transfer functions were modeled and compared with body characteristics. Physical dimensions, respiratory measures obtained by spirometry, and age correlated with magnitude intercepts and slopes of the modeled transfer functions in all three directions. The phase transfer functions were correlated with physical dimensions in the Y and Z directions. The effect of body characteristics on the frequency dependency of attenuation and phase has implications on the use of surface ECG and body surface mapping.
AB - The objective of this study was to determine the effect of body characteristics on the electrical transfer function of the human thorax. Twenty patients undergoing electrophysiologic study were enrolled. Unipolar stimuli were applied in the right ventricular apical and posterioseptal areas. XYZ surface ECGs and unipolar intra-cardiac electrograms of the pacing impulses were recorded and signal-averaged. The intracardiac-to-surface transfer functions were modeled and compared with body characteristics. Physical dimensions, respiratory measures obtained by spirometry, and age correlated with magnitude intercepts and slopes of the modeled transfer functions in all three directions. The phase transfer functions were correlated with physical dimensions in the Y and Z directions. The effect of body characteristics on the frequency dependency of attenuation and phase has implications on the use of surface ECG and body surface mapping.
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U2 - 10.1109/CIC.2005.1588019
DO - 10.1109/CIC.2005.1588019
M3 - Conference contribution
AN - SCOPUS:33847115830
SN - 0780393376
SN - 9780780393370
T3 - Computers in Cardiology
SP - 9
EP - 12
BT - Computers in Cardiology, 2005
T2 - Computers in Cardiology, 2005
Y2 - 25 September 2005 through 28 September 2005
ER -