Document Detail

Effect of the heart-lung boundary on the magnetocardiogram.
MedLine Citation:
PMID:  3805956     Owner:  NLM     Status:  MEDLINE    
Ionic currents flowing during the activation of the heart generate both electric potentials which can be recorded at the body surface as the electrocardiogram or ECG and magnetic fields which can also be recorded at the body surface as what is termed the magnetocardiogram (MCG). In order to apply the MCG to basic research or clinical diagnosis, one must understand the geometric sensitivity of the recorded signals to the cardiac source currents and evaluate the contribution of secondary ohmic body currents relative to the cardiac currents. The present study aims to evaluate the magnitude of the ohmic current contribution by electrically insulating the heart from the body. It is found that volume currents contribute a large part of the MCG signal recorded at distances greater than 10 cm from the heart, but that close to the heart at least one component of the MCG reflects primary cardiac source currents free of interference from volume currents flowing in the body.
M C Leifer; J C Griffin; D C Harrison; J P Wikswo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  19     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1986 Jan 
Date Detail:
Created Date:  1987-03-03     Completed Date:  1987-03-03     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  23-32     Citation Subset:  IM    
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MeSH Terms
Electrocardiography* / methods
Heart / anatomy & histology*,  physiology
Lung / anatomy & histology*,  physiology
Erratum In:
J Electrocardiol 1987 Jan;20(1):80

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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