THE BULLETIN OF TOKYO MEDICAL AND DENTAL UNIVERSITY
Online ISSN : 2435-0761
Print ISSN : 0040-8921
COMPUTER SIMULATION AND EXPERIMENTAL ANALYSIS OF UNIPOLAR EPICARDIAL POTENTIALS IN RELATION TO THE DIRECTION OF PROPAGATION OF THE EXCITATION
Abdul R. S. BUKHARI
著者情報
ジャーナル オープンアクセス

1981 年 28 巻 3 号 p. 77-86

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抄録

A theoretical model for computer simulation has been introduced to predict the unipolar epicardial potentials corresponding to the different angles of propagation of the excitation wavefront. The simulated waveforms were compared with those observed in the animal experiments. In these experiments three unipolar epicardial potentials and one intramural potential were recorded using a thumbtack electrode with and without bipolar epicardial pacing. The direction of the propagation of the excitation was determined from the arrival time of the recorded waveforms. There was a close correspondence between the observed and the simulated waveforms. Furthermore, it was attempted to establish a quantitative relationship between the unipolar potential waveshape and the angle of propagation θ of the excitation. The difference between the positive and the negative peak normalized by the peak-to-peak height was used to define the change in the wavshape. A distinct relation was found to exist between the normalized difference R and the angle θ for the simulated potentials. There was a good correlation (r= 0.96 for n=85) between angle θ1 calculated from the arrival times and θ2, determined from R, which suggests that the angle θ can be estimated from the unipolar epicardial potentials alone, without using any intramural electrode.

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© 1981 Tokyo Medical and Dental University (TMDU)
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