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
Related Documents :
7406059 - Ventricular recovery properties and qrst deflection area in cardiac electrograms.
2719499 - The effect of verapamil in patients with asymptomatic stress-induced ischemia.
962219 - Treadmill stress tests as indicators of presence and severity of coronary artery disease.
16944399 - Salivary steroids at rest and after a training load in young male athletes: relationshi...
9101049 - The effect of heavy work on the musculoskeletal system of dockers.
15513309 - Evaluation of st-segment changes during and after maximal exercise tests in one-, two- ...
24149899 - Energy expenditure and intensity of physical activity in soccer referees during match-p...
2609349 - Alteration of respiratory cycle timing by propranolol.
2522979 - Effect of synthetic atrial natriuretic factor on superficial and deep proximal tubule s...
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    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Coronary Disease / diagnosis*
Exercise Test

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

Previous Document:  Theory and methods of local tissue-pO2 monitoring in experimental angiology.
Next Document:  Myocardial ultrastructure in Kearns-Sayre syndrome.