By Topic

On the relations between the excitation fronts propagating in the heart and the equivalent dipoles

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Y. Okamoto ; Dept. of Appl. Electron., Tokyo Inst. of Technol., Yokohama, Japan ; M. Aoki ; T. Musha ; K. -I. Harumi

The equivalent dipoles of cardiac electrical activity are determined either by minimizing the square deviation between the measured potential distribution and that generated by the dipoles or by comparing them through their multiple expansion coefficients. The two methods, called the direct and indirect method, respectively, are applied to the potential distribution obtained from a three-dimensional heart model composed of about 50000 unit cells, and the dipole locations thus obtained are compared to the mean location of the excitation fronts. When there is a single excitation front with simple shape, the equivalent dipole location obtained from the single-moving-dipole approximation coincides with the mean location of the excitation front. The coincidence is better with the direct method, but it needs longer calculation time than with the indirect method. For 25-30 ms after the onset of the ventricular depolarization, the excitation fronts have complicated shapes, and the deviations of the equivalent dipole locations from their mean locations become large even if the two-moving-dipole approximation is used.

Published in:

IEEE Transactions on Biomedical Engineering  (Volume:35 ,  Issue: 5 )