Abstract
Procedures used for an assessment of the electrical heart field from the body surface are electrocardiography, vectorcardiography, and body surface potential mapping (BSM). BSM has some advantages but the results obtained using BSM cannot answer all questions about real causality of detected changes.
Mathematical model was therefore used in order to answer these questions. A simple and anatomical forward calculation model was used to test the hypothesis whether the altered position of the heart could explain heterogeneity of repolarization at late stages of pregnancy.
Our findings included: Repolarization duration in healthy subjects is distributed regularly and predictably on the body surface. At any systemic analysis, it is vital to consider the regions where electrode systems record low amplitudes due to methodological, not pathological reasons.
Heterogenous model did not yield superior results over homogenous one possibly since none reflected the specific torso geometry of individual patients.