Document Detail

Magnetocardiograms of patients with left ventricular overloading recorded with a second-derivative SQUID gradiometer.
MedLine Citation:
PMID:  6237164     Owner:  NLM     Status:  MEDLINE    
Magnetocardiograms (MCGs) were recorded by means of a second-derivative SQUID (superconducting quantum interference device) magnetometer in 60 normal subjects and 95 patients with left ventricular overloading to determine the clinical value of the MCG. In patients with left ventricular overloading, the Q or S wave was increased in the upper anterior part of the thorax, and the R wave was increased in the left lower part of the thorax, indicating increased leftward force due to left ventricular overloading. For detection of left ventricular hypertrophy or dilatation from echocardiographic measurements, the sensitivity and specificity of the MCG were similar to those of the standard ECG, or slightly better. In patients with left ventricular systolic overloading, the Q wave was decreased in the lower anterior part of the thorax, indicating a decreased septal vector. Inversion of the T wave was seen more frequently in the MCGs than in the ECGs of patients with left ventricular overloading, suggesting that the MCG is useful for detecting early abnormalities of repolarization. These results suggest that the MCG may provide information that is difficult to obtain from the standard 12-lead ECG.
K Fujino; M Sumi; K Saito; M Murakami; T Higuchi; Y Nakaya; H Mori
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  17     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1984 Jul 
Date Detail:
Created Date:  1984-11-06     Completed Date:  1984-11-06     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  219-28     Citation Subset:  IM    
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MeSH Terms
Aortic Stenosis, Subvalvular / physiopathology
Cardiomegaly / physiopathology*
Cardiomyopathy, Hypertrophic / physiopathology
Electrocardiography / instrumentation*,  methods
Electromagnetic Fields
Heart Conduction System / physiopathology
Heart Failure / physiopathology*
Heart Septal Defects, Ventricular / physiopathology
Heart Ventricles / physiopathology
Hypertension / physiopathology
Middle Aged
Mitral Valve Insufficiency / physiopathology

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

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