PMID: 9662152Jul 14, 1998Paper

A novel interpolation method for electric potential fields in the heart during excitation

Annals of Biomedical Engineering
Q NiB Taccardi

Abstract

In mapping the electrical activity of the heart, interpolation of electric potentials plays two important roles. First, it permits the estimation of potentials in regions that could not be sampled or where signal quality was poor, and second, it supports the construction of isopotential lines and surfaces for visualization. The difficulty in developing robust interpolation techniques for cardiac applications lies in the abrupt change in potential in the vicinity of the activation wave front. Despite the resulting nonlinearities in spatial potential distributions, simple linear interpolation methods are the current standard and the resulting errors due to aliasing can be large if electrode spacing does not lie on the order of 0.5-2 mm--the thickness of the activation wave front. We have developed a novel interpolation method that is based on two observations specific to the spread of excitation in the heart: (1) that propagation velocity changes smoothly within a region large enough to contain several measurement electrodes and (2) that electrogram morphology varies very little in the neighborhood of each sample point except for a time shift in the potential wave forms. The resulting interpolation scheme breaks the interpolation...Continue Reading

Citations

Mar 10, 2007·Computers in Biology and Medicine·Bülent Yilmaz, Uğur Cunedioğlu
Nov 16, 2005·IEEE Transactions on Bio-medical Engineering·Bülent YilmazDana H Brooks
Jul 5, 2005·Circulation Research·Christopher J HyattArkady M Pertsov

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