title: Contribution of the left anterior myocardium to the body surface potentials in case of apical ectopic beat.
abstract: The present paper describes a study where effects of anterior myocardium on body surface potentials were investigated. The study combines numerical lead field analysis combined with cardiac automata model. Electric fields are calculated with finite difference method in a 3-D model of male thorax. The cardiac activation applied in the study is an ectopic beat originating in the apex. The correlations and mean differences between signal generated by anterior segments of left ventricle and signal generated by both ventricles were analysed for 117 leads. The results show that there are leads which have high correlation (>0.9) with low the relative mean difference (<0.2) between the signals generated by anterior segments and signals generated by whole ventricles. These electrode locations would be optimal to monitor the activation of anterior segments when ectopic beats originate in apex.
authors.affiliation: Ragnar Granit Institute, Tampere University of Technology, PO. Box 692, 33101, Tampere, Finland. juho.vaisanen@tut.fi
authors.forename: Juho
authors.initials: J
authors.lastname: Väisänen
authors.forename: Jesús
authors.initials: J
authors.lastname: Requena-Carrión
authors.forename: Felipe
authors.initials: F
authors.lastname: Alonso-Atienza
authors.forename: José Luis
authors.initials: JL
authors.lastname: Rojo-Alvarez
authors.forename: Jaakko
authors.initials: J
authors.lastname: Malmivuo
authors.forename: Jari
authors.initials: J
authors.lastname: Hyttinen
mesh_terms: D000328:Adult; D018780:Body Surface Potential Mapping / Q000379:methods*; D005117:Cardiac Complexes, Premature / Q000175:diagnosis* / Q000503:physiopathology*; D003198:Computer Simulation; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D008297:Male; D008955:Models, Cardiovascular