Document Detail


QT dispersion within the first 6 months after an acute myocardial infarction: relationship with systolic function, left ventricular volumes, infarct related artery status and clinical outcome.
MedLine Citation:
PMID:  11532545     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
INTRODUCTION: We analysed QT dispersion within the first 6 months postinfarction, its relationship with the main established risk stratifiers and its clinical value. METHODS AND RESULTS: In 55 patients with a first Q-wave myocardial infarction the 12-lead electrocardiogram was scanned and digitised for analysis of QT dispersion (QT maximum-QT minimum) at first day (72 [61-96] ms), first week (69 [47-90] ms), first month (67 [46-88] ms) and sixth month (47 [40-74] ms; P<0.0001 vs. first day). Cardiac catheterization was performed at first week and at sixth month; QT dispersion was not related to ejection fraction, left ventricular volumes, infarct related artery status or contractile reserve (improvement of the infarcted area with low-dose dobutamine); no relation was found between QT dispersion decrease from first week to sixth month with regional systolic function improvement. Finally, during a mean follow-up period of 35+/-22 months QT dispersion was not independently related to clinical events. CONCLUSION: QT dispersion decreases progressively during the first months after myocardial infarction. These changes should be taken into account to define cut-off values of clinical interest in this phase. This variable does not seem related to the classic prognosis predictors. In a nonselected postinfarction population it has a low clinical value.
Authors:
V Bodí; J Sanchis; A Navarro; E Plancha; F J Chorro; A Berenguer; L Insa; P Escriche; F Cabadés; A Llácer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of cardiology     Volume:  80     ISSN:  0167-5273     ISO Abbreviation:  Int. J. Cardiol.     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-09-04     Completed Date:  2001-10-25     Revised Date:  2006-07-12    
Medline Journal Info:
Nlm Unique ID:  8200291     Medline TA:  Int J Cardiol     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  37-45     Citation Subset:  IM    
Affiliation:
Cardiology Unit, Internal Medicine Department, Hospital Comarcal. Avda. Gil de Atroncillo s/n. 12500, Vinaròs, Spain. vicentbodi@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Coronary Vessels / physiopathology
Electrocardiography
Female
Heart Conduction System / physiopathology*
Humans
Male
Middle Aged
Multivariate Analysis
Myocardial Infarction / diagnosis,  mortality,  physiopathology*
Prognosis
Prospective Studies
Regression Analysis
Risk
Spain / epidemiology
Survival Analysis
Systole
Ventricular Function, Left

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