| The influence of R-wave amplitude on the degree of ST-segment depression in exercise electrocardiography in the individual patient. | |
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MedLine Citation:
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PMID: 3813119 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Many factors have been found to influence the magnitude of ST-segment depression in the exercise electrocardiogram. We investigated whether R-wave amplitude is a significant factor. We studied the exercise electrocardiogram of 20 patients with angiographically documented coronary artery disease, including greater than or equal to 70% stenosis of the left anterior descending artery, who had an ischemic response to exercise but no previous anterior myocardial infarction. Precordial leads V1-6 were taken into account. When all 120 leads were measured, those with ST-segment depression greater than or equal to 2.0mm at peak exercise had a mean resting R-wave amplitude of 19.03 +/- 5.81mm; those with ST-segment depression 2.0-1.0mm, R 11.42 +/- 5.99mm; and those with ST-segment depression less than 1.0mm, R 5.9 +/- 5.21mm (p less than 0.001 between groups). When the R-wave amplitude was correlated with the ST-segment depression in each precordial lead, the correlation was 1.0. In leads V1-6, when 67 tracings with ST-segment depression greater than 0.5mm were measured, the correlation was 0.537 (p less than 0.001). In each precordial lead the t values of R-wave differences correlated very strongly (r less than 0.883) with the differences in ST-segment depression. We conclude that precordial R-wave amplitude significantly influences the magnitude of ST-segment depression. |
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Authors:
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D V Cokkinos; A Papantonakos; C Perrakis; S Argyrakis; G Kouvaras; A Tzonou; K Patsouros |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Angiology Volume: 38 ISSN: 0003-3197 ISO Abbreviation: Angiology Publication Date: 1987 Jan |
Date Detail:
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Created Date: 1987-03-18 Completed Date: 1987-03-18 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0203706 Medline TA: Angiology Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 22-7 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Coronary Disease
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diagnosis* Electrocardiography* Exercise Test Humans |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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