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The aim of this study is to determine instantaneous 3-D locations and moments of moving equivalent multipoles (EM) corresponding to the principal components (PC) obtained from body surface potential map (BSPM) of the CINC/Physionet Challenge 2007 database. Moving EM (three dipoles and one quadrupole) were determined for the successive time windows of 10 ms in steps of 5 ms using multipole models in an unbounded and bounded spherical homogenous conductor. EM parameters were obtained in two steps: in the forward and inverse problem formulation, necessary for the reconstruction of the original BSPM signals. The reconstruction errors in the region of the QRS complex were 1.0% for the first 3 biggest PC, and 6.2% and 5.7% for three dipoles and one quadrupole for the bounded and unbounded EM model, respectively. The corresponding RMS errors were 3.8, 21.5 and 19.8 μV.
Computing in Cardiology, 2010
Date of Conference: 26-29 Sept. 2010