Abstract
Based on our constructed whole heart electrophysiological model, we investigated the usability of body surface potential mapping (BSPM) in two aspects. One was to find the resolution of separating ventricular ectopic pacemakers. Another was to determine the influence of lead density on BSPM. We selected 24 ventricular ectopic pacemakers in all, 18 in a horizontal ventricular section within 12.5 mm×16 mm and 6 a vertical line with the length of 7.5 mm. The two selected ventricular ectopic pacemakers were considered to be separable if the correlation coefficient of their QRS integral map of BSPMs was less than a threshold. For each ectopic pacemaker in the same region, correlation coefficients were calculated between itself and each of the other ones, and the resolution were obtained based on these correlation coefficients. Lead density was reduced by evenly deleting the columns or rows in the lead array under the condition that the remaining leads covering the same area as the original ones. Using the method of statistical inverse deduction, we estimated the values of the whole leads based on the potentials on the leads with lower density. And the correlation coefficients between the estimated potentials and the simulated ones were calculated. Results showed that the resolution for horizontal ventricular section was (2.80±0.62) mm. And the resolution for the vertical line was (3.25±0.39) mm. When the lead numbers were changed from the original 252 to 132, 72 and 36, the correlation coefficients of the estimated potentials and the simulated ones were 0.9865±0.0.0503, 0.9457±0.0596 and 0.8521±0.0790, respectively. At the same time, resolution of separating ventricular ectopic pacemakers decreased with the reduction of lead density. In addition to proving the validation of our constructed model, the usability tests provide delighting information about the influence of lead density on the performance of BSPM.
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© 2013 Springer-Verlag Berlin Heidelberg
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Li, X.Y., Yang, X.L., Peng, Y. (2013). Usability Evaluation of Body Surface Potential Mapping in Resolution of Ventricular Ectopic Pacemaker Separation and Lead Density. In: Long, M. (eds) World Congress on Medical Physics and Biomedical Engineering May 26-31, 2012, Beijing, China. IFMBE Proceedings, vol 39. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29305-4_552
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DOI: https://doi.org/10.1007/978-3-642-29305-4_552
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-29304-7
Online ISBN: 978-3-642-29305-4
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