Document Detail

The influence of R-wave amplitude on the degree of ST-segment depression in exercise electrocardiography in the individual patient.
MedLine Citation:
PMID:  3813119     Owner:  NLM     Status:  MEDLINE    
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.
D V Cokkinos; A Papantonakos; C Perrakis; S Argyrakis; G Kouvaras; A Tzonou; K Patsouros
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Angiology     Volume:  38     ISSN:  0003-3197     ISO Abbreviation:  Angiology     Publication Date:  1987 Jan 
Date Detail:
Created Date:  1987-03-18     Completed Date:  1987-03-18     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0203706     Medline TA:  Angiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  22-7     Citation Subset:  IM    
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MeSH Terms
Coronary Disease / diagnosis*
Exercise Test

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