Document Detail


Heart-rate turbulence after ventricular premature beats as a predictor of mortality after acute myocardial infarction.
MedLine Citation:
PMID:  10227219     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Identification of high-risk patients after acute myocardial infarction is essential for successful prophylactic therapy. The predictive accuracy of currently used risk predictors is modest even when several factors are combined. Thus, establishment of a new powerful method for risk prediction independent of the available stratifiers is of considerable practical value. METHODS: The study investigated fluctuations of sinus-rhythm cycle length after a single ventricular premature beat recorded in Holter electrocardiograms, and characterised the fluctuations (termed heart-rate turbulence) by two numerical parameters, termed turbulence onset and slope. The method was developed on a population of 100 patients with coronary heart disease and blindly applied to the population of the Multicentre Post-Infarction Program (MPIP; 577 survivors of acute infarction, 75 deaths during a median follow-up of 22 months) and to the placebo population of the European Myocardial Amiodarone Trial (EMIAT; 614 survivors of acute myocardial infarction, 87 deaths during median follow-up of 21 months). Multivariate risk stratification was done with the new parameters and conventional risk factors. FINDINGS: One of the new parameters (turbulence slope) was the most powerful stratifier of follow-up mortality in EMIAT and the second most powerful stratifier in MPIP: MPIP risk ratio 3.5 (95% CI 2.2-5.5, p<0.0001), EMIAT risk ratio 2.7 (1.8-4.2, p<0.0001). In the multivariate analysis, low left-ventricular ejection fraction and turbulence slope were the only independent variables for mortality prediction in MPIP (p<0.001), whereas in EMIAT, five variables were independent mortality predictors: abnormal turbulence onset, abnormal turbulence slope, history of previous infarction, low left-ventricular ejection fraction, and high mean heart rate (p<0.001). In both MPIP and EMIAT, the combination of abnormal onset and slope was the most powerful multivariate risk stratifier: MPIP risk ratio 3.2 (1.7-6.0, p<0.0001), EMIAT risk ratio 3.2 (1.8-5.6, p<0.0001). INTERPRETATION: The absence of the heart rate turbulence after ventricular premature beats is a very potent postinfarction risk stratifier that is independent of other known risk factors and which is stronger than other presently available risk predictors.
Authors:
G Schmidt; M Malik; P Barthel; R Schneider; K Ulm; L Rolnitzky; A J Camm; J T Bigger; A Schömig
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Lancet     Volume:  353     ISSN:  0140-6736     ISO Abbreviation:  Lancet     Publication Date:  1999 Apr 
Date Detail:
Created Date:  1999-05-17     Completed Date:  1999-05-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985213R     Medline TA:  Lancet     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1390-6     Citation Subset:  AIM; IM    
Affiliation:
Erste Medizinische Klinik, Technischen Universität München, Germany. gschmidt@med1.med.tu-menchen.de
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MeSH Terms
Descriptor/Qualifier:
Aged
Female
Heart Rate*
Humans
Male
Middle Aged
Multivariate Analysis
Myocardial Infarction / mortality*,  physiopathology*
Prognosis
Reproducibility of Results
Survival Rate
Ventricular Premature Complexes / physiopathology*
Comments/Corrections
Comment In:
Lancet. 1999 Apr 24;353(9162):1377-9   [PMID:  10227214 ]

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


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