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Summary: International Journal of Bioelectromagnetism www.tut.fi/ijbem
Vol. x, No. x, pp. xx - xx, 2009
Changes in Body-Surface Electrocardiograms from
Geometric Remodeling due to Obesity
R. Martin Arthura
, Shuli Wanga
, and Jason W. Trobaughab
a
Electrical and Systems Engineering, School of Engineering and Applied Science,
b
Department of Medicine, School of Medicine, Washington University in St. Louis
Correspondence: RM Arthur, Department of Electrical and Systems Engineering, Washington University in St. Louis, Campus
Box 1127, One Brookings Drive, St. Louis, MO 63130. E-mail: rma@ese.wustl.edu, phone +001 314 935 6167, fax +001 314
935 7500
Abstract. Both diabetes and obesity are responsible for deleterious changes to the heart. To separate
consequences of geometric changes from electrophysiologic ones, we investigated how changes in
cardiac and torso geometry, associated with obesity, affected body-surface electrocardiograms. For
this study, we modified the realistic heart and torso models of the simulation package ECGSIM.
Body-surface potentials were calculated from transmembrane potentials on the heart surface and
studied using isopotential maps and spectral and principal-component analysis. We found relative
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