Document Detail

The role of esophageal leads in the detection of exercise-induced postero-basal ischemia.
MedLine Citation:
PMID:  2654029     Owner:  NLM     Status:  MEDLINE    
The effects of maximal hyperventilation and submaximal exercise were studied on the unipolar, esophageal electrocardiogram recorded at ventricular level in 25 'normal' persons and 15 patients having ischemic heart disease with a positive exercise stress test. In normal persons, hyperventilation decreased the amplitude of the R and T waves in 10 and 6 cases, respectively. Submaximal exercise increased the height of the P wave in 8 cases, decreased the amplitude of the R wave in 16 cases and increased the depth of the S wave in 10 cases. In patients with established ischemic heart disease, the esophageal lead could detect exercise-induced posterior ischemia in 8 cases when compared to lead V8, which could detect posterior ischemia in only 3 cases. It is inferred that the esophageal lead placed at the ventricular level is much more sensitive in detecting exercise-induced posterobasal ischemia. Lack of facilities for coronary angiographic and exercise thallium scintigraphic studies limited us from correlating this study and thereby establishing its independent usefulness.
S R Mittal; J P Sethi; D Sharma
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of cardiology     Volume:  23     ISSN:  0167-5273     ISO Abbreviation:  Int. J. Cardiol.     Publication Date:  1989 Apr 
Date Detail:
Created Date:  1989-06-15     Completed Date:  1989-06-15     Revised Date:  2006-07-12    
Medline Journal Info:
Nlm Unique ID:  8200291     Medline TA:  Int J Cardiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  69-77     Citation Subset:  IM    
J.L.N. Medical College, Ajmer, Rajasthan, India.
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MeSH Terms
Coronary Disease / diagnosis*,  physiopathology
Electrocardiography / methods*
Exercise Test*
Predictive Value of Tests
Sensitivity and Specificity

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