Document Detail


Magnetocardiographic studies of ventricular repolarization in old inferior myocardial infarction.
MedLine Citation:
PMID:  2702969     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Isomagnetic maps of 50 normal subjects (control group) and 23 patients with old inferior myocardial infarction (IMI group) were recorded in order to analyse T wave abnormalities in inferior myocardial infarction. The T wave of the magnetocardiogram (MCG) in the control group showed negative deflections in the left upper portion and positive deflections in the right lower portion, thus resulting in a T vector directed leftward and inferiorly. The T wave of the IMI group was flat or positive in the left upper portion and flat or negative in the right lower portion, suggesting a T vector directed superiorly. In addition, opposing dipoles were observed in 36.4% of the IMI group; i.e. one directed superiorly, presumably due to inferior myocardial ischaemia, and the other directed inferiorly due to normal repolarization. Localized T vector abnormalities could be detected by the MCG in some cases, in which coronary T waves of the standard electrocardiogram had returned to normal. Furthermore, multiple dipoles were more frequently observed in the isomagnetic map than in the isopotential map (5 vs. 15; P less than 0.01). These results suggest that the MCG is helpful in diagnosing myocardial ischaemia when this is not detectable on the electrocardiogram.
Authors:
M Nomura; Y Nakaya; K Fujino; S Ishihara; M Katayama; A Takeuchi; K Watanabe; Y Hiasa; T Aihara; H Mori
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European heart journal     Volume:  10     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  1989 Jan 
Date Detail:
Created Date:  1989-05-16     Completed Date:  1989-05-16     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  8-15     Citation Subset:  IM    
Affiliation:
Second Department of Internal Medicine, School of Medicine, University of Tokushima, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Arrhythmias, Cardiac / diagnosis,  etiology
Electrocardiography / methods*
Female
Heart Ventricles / physiopathology
Humans
Magnetics*
Middle Aged
Myocardial Infarction / complications,  diagnosis*,  physiopathology

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