Three-Dimensional Electrogram in Spherical Coordinates: Application to Ischemia Analysis

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Authors

JANOUŠEK Oto KOLÁŘOVÁ Jana NOVÁKOVÁ Marie PROVAZNÍK Ivo

Year of publication 2010
Type Article in Periodical
Magazine / Source Physiological Research
MU Faculty or unit

Faculty of Medicine

Citation
Field Physiology
Keywords Three dimensional electrogram;Vectorcardiogram;Spatiocardiogram;Vectorcardiography parameters;Myocardial ischemia
Description Three-dimensional electrogram was used for analysis of ischemia manifestation in isolated hearts. Three parameters based on spherical coordination system were used in this study - amplitude of electrical heart vector, its azimuth and elevation. The parameters were presented as a trend. This approach reflected ischemic changes in a manner which can be easily observed and evaluated. Ischemia was analysed in seven isolated hearts of New Zealand white rabbits. It was found that (a) ischemia changes heart electric vector, (b) ischemic preconditioning has a protective effect, and (c) both of these findings can be clearly observed by the proposed method.
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