Title: Possible sources of new information in the magnetocardiogram
Abstract: Abstract The theoretical basis for the relationship between the electric and magnetic fields of the heart is examined in terms of impressed currents, J j , from a biologically active region imbedded in an Ohmic conductor. For quasistatic sources in a uniform conductor, it is shown that the problem of measuring the electrocardiogram or magnetocardiogram is an inverse problem rendered non-unique by the presence of so-called silent sources. An important class of sources, toroidal J j , are silent electrically and not silent magnetically and these sources result in inherent differences between the information content of the electric and magnetic measurement techniques. A hypothetical example of cardiac activation departing from the conventional uniform double-layer model is presented to indicate that electrically silent sources cannot be ruled out a priori without careful magnetic measurements.
Publication Year: 1982
Publication Date: 1982-04-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
Access and Citation
Cited By Count: 59
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