| Relationship between the site of a myocardial infarction and signal-averaged electrocardiogram indices. | |
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MedLine Citation:
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PMID: 9510486 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We evaluated the relationship between the site of a myocardial infarction (MI) and signal-averaged electrocardiogram (SAECG) indices in both time-domain (TDA) and spectral turbulence (STA) analyses, and their implications in the prediction of infarct-related artery (IRA) patency, in 114 survivors of a first MI. They were divided into two groups based on MI location (57 anterior and 57 inferior). Patients with bundle branch block were not included. Fifty patients had been treated with thrombolytic therapy (TT). The STA was done in both XYZ-leads and in vector magnitude. Forty patients had an abnormal SAECG in TDA and 37 in STA, but only 22 (19%) in both (71% of agreement, kappa=0.35). Fifty-four patients (47%) had an occluded IRA. The best predictors from multivariate analysis of having an occluded IRA in the inferior MI group were: an abnormal Y-lead in STA (odds ratio 4.9; P=0.005); an abnormal RMS40 in TDA (odds ratio, 4.8; P=0.02); absence of TT (odds ratio, 9.15; P=0.001). Conversely, in the anterior MI group they were: an abnormal SAECG in TDA (odds ratio 6.83; P=0.005); absence of TT (odds ratio, 4.3; P=0.02). The multivariate receiver operator characteristic curves clearly showed the effect of MI location on the SAECG indices. This study suggests that the myocardial infarction site is an important factor for the variability and poor concordance between TDA and STA. Such differences may alter the predictive accuracy of SAECG. TDA and STA should be complementary methods, and the exploration in each orthogonal lead appears to be better than in vector magnitude. |
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Authors:
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M Rosas; A G Hermosillo; O Infante; J Kuri; M Cardenas |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: International journal of cardiology Volume: 63 ISSN: 0167-5273 ISO Abbreviation: Int. J. Cardiol. Publication Date: 1998 Jan |
Date Detail:
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Created Date: 1998-05-19 Completed Date: 1998-05-19 Revised Date: 2006-07-12 |
Medline Journal Info:
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Nlm Unique ID: 8200291 Medline TA: Int J Cardiol Country: IRELAND |
Other Details:
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Languages: eng Pagination: 129-40 Citation Subset: IM |
Affiliation:
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Department of Electrocardiography and Electrophysiology, Instituto Nacional de Cardiología, Ignacio Chávez, Talplan, México City, DF, México. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Analysis of Variance Coronary Angiography Electrocardiography / methods* Female Humans Logistic Models Male Middle Aged Myocardial Infarction / diagnosis*, pathology, physiopathology Predictive Value of Tests Probability Sensitivity and Specificity Signal Processing, Computer-Assisted Vascular Patency |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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