Document Detail

Relationship between terminal QRS distortion on the admission electrocardiogram and the time course of left ventricular wall motion in anterior wall acute myocardial infarction.
MedLine Citation:
PMID:  11216826     Owner:  NLM     Status:  MEDLINE    
In order to clarify the time course of left ventricular (LV) wall motion in patients with anterior acute myocardial infarction (AMI) showing terminal QRS distortion on the admission electrocardiogram (ECG), the present study examined 106 patients with their first anterior AMI (< or =6 h) who underwent emergency coronary arteriography and cardiac cathetherization at 1 and 6 months after the infarction. The patients were classified into 2 groups according to the presence (group A, n=23) or absence (group B, n=83) of terminal QRS distortion (emergence of the J point at > or =50% of the R-wave amplitude in leads with QR configuration and/or absence of S waves in leads with RS configuration) on the admission ECG. Group A had a lower LV ejection fraction and more reduced regional wall motion (RWM) in the infarct region at both 1 and 6 months after AMI than group B. The degree of improvement in RWM between 1 and 6 months after AMI was less in group A than in group B (-0.1+/-0.5 vs 0.4+/-0.6 SD/chord, p<0.01). This study indicates that patients with anterior AMI showing terminal QRS distortion on the admission ECG have more severely depressed LV wall motion and less improvement in RWM in the infarct region in the healing stage, suggesting that this sign is an indicator of severe myocardial damage.
A Tamura; K Nagase; T Watanabe; M Nasu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Japanese circulation journal     Volume:  65     ISSN:  0047-1828     ISO Abbreviation:  Jpn. Circ. J.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-02-16     Completed Date:  2001-07-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7806868     Medline TA:  Jpn Circ J     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  63-6     Citation Subset:  IM    
Second Department of Internal Medicine, Oita Medical University, Hasama, Japan.
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MeSH Terms
Middle Aged
Myocardial Contraction
Myocardial Infarction / physiopathology*
Ventricular Function, Left*

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