Document Detail


Effect of hormone replacement therapy on the electrocardiographic response to exercise.
MedLine Citation:
PMID:  12161713     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Female gender and hormonal status affect electrocardiographic (ECG) response to exercise. Both are often cited as factors contributing to the decreased diagnostic accuracy of exercise stress tests in women. However, there is a paucity of data. To explore the relationship between hormonal status and exercise-induced ECG changes, we used gated single photon emission computed tomography (SPECT) technetium 99m sestamibi imaging for detection of myocardial ischemia. METHODS AND RESULTS: ECG response to exercise was analyzed in all female patients who underwent symptom-limited exercise stress testing over a 12-month period with no evidence of ischemia on SPECT myocardial perfusion imaging (N = 404). Hormonal status was defined as premenopausal (n = 78), postmenopausal (n = 277), and postmenopausal on hormone replacement therapy (HRT) (n = 49). Positive ECG response for ischemia was defined as 1 mm or greater horizontal and/or downsloping ST depression during and/or after exercise. The frequency of a positive ECG response to exercise without evidence of ischemia on gated SPECT imaging was analyzed according to hormonal status. Seventeen of 78 premenopausal women (22%), 48 of 277 postmenopausal women (17%), and 19 of 49 women taking HRT (39%) had a positive ECG response. ECG positivity was significantly higher in HRT users when compared with premenopausal (P =.05) and postmenopausal women (P =.001). CONCLUSIONS: Exogenous estrogen replacement therapy affects ST-segment response to exercise, likely through a nonischemic mechanism. Unless HRT can be discontinued for a prolonged period of time (up to 6 weeks) prior to a stress test, myocardial imaging should be used to improve diagnostic accuracy.
Authors:
Milena J Henzlova; Lori B Croft; Joseph A Diamond
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology     Volume:  9     ISSN:  1071-3581     ISO Abbreviation:  J Nucl Cardiol     Publication Date:    2002 Jul-Aug
Date Detail:
Created Date:  2002-08-05     Completed Date:  2002-09-27     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9423534     Medline TA:  J Nucl Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  385-7     Citation Subset:  IM    
Affiliation:
Mount Sinai Medical Center, The Zena and Michael A. Wiener Cardiovascular Institute, New York, NY 10029, USA. milena.henzlova@mssm.edu
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MeSH Terms
Descriptor/Qualifier:
Adult
Age Factors
Aged
Electrocardiography / drug effects*
Estrogen Replacement Therapy*
Estrogens / pharmacology*
Exercise / physiology*
Exercise Test / drug effects*
Female
Humans
Middle Aged
Myocardial Ischemia / physiopathology*,  radionuclide imaging*
Postmenopause / physiology
Premenopause / physiology
Reproducibility of Results
Sex Factors
Chemical
Reg. No./Substance:
0/Estrogens

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


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