Open AccessThree-dimensional electrogram in spherical coordinates: application to ischemia analysis
Author(s) -
Oto Janoušek,
Jana Kolářová,
Marie Novàkovâ,
Ivo Provazník
Publication year - 2010
Publication title -
physiological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.647
H-Index - 70
eISSN - 1802-9973
pISSN - 0862-8408
DOI - 10.33549/physiolres.932013
Subject(s) - ischemia , azimuth , cardiology , medicine , amplitude , elevation (ballistics) , physics , mathematics , geometry , optics
Three-dimensional electrogram was used for analysis of ischemiamanifestation in isolated hearts. Three parameters based onspherical coordination system were used in this study –amplitude of electrical heart vector, its azimuth and elevation.The parameters were presented as a trend. This approachreflected ischemic changes in a manner which can be easilyobserved and evaluated. Ischemia was analysed in seven isolatedhearts of New Zealand white rabbits. It was found that (a)ischemia changes heart electric vector, (b) ischemicpreconditioning has a protective effect, and (c) both of thesefindings can be clearly observed by the proposed method.