Document Detail

On the variability of QRS time-duration in magnetocardiographic recordings.
MedLine Citation:
PMID:  12775457     Owner:  NLM     Status:  MEDLINE    
High resolution electrocardiography (HRECG) recordings have already shown an increased beat-to-beat microvariability of the QRS duration of the terminal QRS in patients with a history of ventricular tachycardia (VT). The purpose of this study is to detect QRS-duration microvariability with magnetocardiographic (MCG) recordings in normals, patients with coronary heart disease (CHD), patients with a history of myocardial infarction (MI), and VT patients. QRS microvariability is calculated as the variance of time-shifts of single beats respectively to the average of all beats. The average over all channels of the MCG is performed. QRS microvariability was evaluated from 55-channel MCG in 15 normal persons, in 12 patients with CHD, in 13 patients with MI, and in 10 patients with VT. We found a significantly higher microvariability in patients with MI compared to normals. The highest microvariability was found in VT patients.
B G Schless; H-P Müller; A Pasquarelli; S N Erné; V Hombach
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Journal of medical engineering & technology     Volume:  27     ISSN:  0309-1902     ISO Abbreviation:  J Med Eng Technol     Publication Date:    2003 May-Jun
Date Detail:
Created Date:  2003-05-30     Completed Date:  2003-10-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7702125     Medline TA:  J Med Eng Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  113-7     Citation Subset:  IM    
Department of Cardiology, University of Ulm, D-89081 Ulm Germany.
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MeSH Terms
Coronary Disease / diagnosis,  physiopathology*
Diagnosis, Computer-Assisted / methods*
Electrocardiography / methods*
Heart Rate*
Magnetics / diagnostic use
Middle Aged
Models, Cardiovascular
Models, Statistical
Myocardial Infarction / diagnosis,  physiopathology*
Reproducibility of Results
Sensitivity and Specificity
Tachycardia, Ventricular / diagnosis,  physiopathology*

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

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