Document Detail


Exercise testing in patients with electrocardiographic evidence of left ventricular hypertrophy.
MedLine Citation:
PMID:  7805329     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to determine the influence of left ventricular hypertrophy, based on electrocardiographic evidence, on the results of exercise thallium testing. Patients with electrocardiographic evidence of left ventricular hypertrophy (ECG-LVH) and suspected of having coronary artery disease underwent exercise thallium testing. Retrospective analysis of 107 consecutive patients with ECG-LVH showed transient myocardial perfusion defects (TMPD) in 12 (11%), indicative of myocardial ischemia; 12 (11%) had fixed myocardial perfusion defects (FMPD), indicative of probable myocardial infarction; 5 had TMPD plus FMPD (5%), and scan results for 78 were normal (73%). In patients with ECG-LVH, additional ST changes were observed in 76% and chest pain in 7% of patients with ECG-LVH. In a matched comparison group of 255 patients not prescreened for ECG-LVH, TMPD was observed in 20%, FMPD in 16%, and TMPD plus FMPD in 26% of patients, and normal results were found in 38%. Electrocardiographic changes were found in 49% and chest pain in 20%. Hemodynamic responses to exercise were comparable between subgroups. Lung thallium uptake was quantified as the lung-to-heart thallium activity ratio (L-H) on the immediate exercise anterior planar images. In controls, a significant increase in L-H was observed in patients with TMPD and TMPD plus FMPD. This was not observed in patients with ECG-LVH, possibly because of elevated thallium myocardial activity as a result of increased left ventricular mass. The conclusion is that patients with ECG-LVH often had normal perfusion scan results (73%) on exercise despite a high incidence of additional ECG changes (76%).(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
A A Alshami; S R Jolly; F L Smith; W C Reeves; A Movahed
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Clinical nuclear medicine     Volume:  19     ISSN:  0363-9762     ISO Abbreviation:  Clin Nucl Med     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1995-02-02     Completed Date:  1995-02-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7611109     Medline TA:  Clin Nucl Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  904-9     Citation Subset:  IM    
Affiliation:
Department of Medicine, East Carolina University, Greenville, North Carolina.
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MeSH Terms
Descriptor/Qualifier:
Coronary Disease / diagnosis,  epidemiology,  radionuclide imaging*
Electrocardiography*
Exercise Test*
Female
Heart / radionuclide imaging*
Humans
Hypertrophy, Left Ventricular / diagnosis,  physiopathology,  radionuclide imaging*
Incidence
Lung / radionuclide imaging
Male
Middle Aged
Retrospective Studies
Sensitivity and Specificity
Thallium Radioisotopes / diagnostic use*
Chemical
Reg. No./Substance:
0/Thallium Radioisotopes

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


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