Document Detail


Prevalence and prognostic significance of exercise-induced supraventricular tachycardia in apparently healthy volunteers.
MedLine Citation:
PMID:  7717280     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The prevalence, characteristics, and prognostic significance of supraventricular tachycardia (SVT) occurring during maximal treadmill exercise testing were examined in 843 male and 540 female asymptomatic volunteers aged 20 to 94 years from the Baltimore Longitudinal Study of Aging who underwent exercise testing a mean of 2.3 times between 1977 and 1991. Exercise-induced SVT occurred during at least 1 test in 51 men (6.0%) and 34 women (6.3%), p = NS for gender. The 85 subjects with exercise-induced SVT were significantly older than the 1,298 free from this arrhythmia (66.0 +/- 13.5 vs 49.7 +/- 18.0 years, respectively, p < 0.001). The prevalence of SVT increased with age in men (p < 0.001) but not in women. Ninety-eight percent of the 141 discrete episodes of exercise-induced SVT were paroxysmal SVT, with heart rates varying from 105 to 290 beats/min (mean 186.3 +/- 43.3); only 16% were > 10 beats in duration and only 4% of subjects were symptomatic. Nearly half (44%) of SVT episodes occurred at peak effort. Coronary risk factors, echocardiographic left atrial size (3.3 +/- 6.7 vs 3.3 +/- 0.6 cm), and the prevalence of exercise-induced ischemic ST-segment depression (11% vs 13%) were similar in 85 subjects with SVT and 170 control subjects matched for age and sex.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
M S Maurer; E A Shefrin; J L Fleg
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  75     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1995 Apr 
Date Detail:
Created Date:  1995-05-18     Completed Date:  1995-05-18     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  788-92     Citation Subset:  AIM; IM    
Affiliation:
Laboratory of Cardiovascular Science and Longitudinal Studies, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Age Factors
Aged
Aged, 80 and over
Baltimore / epidemiology
Case-Control Studies
Electrocardiography
Exercise Test
Female
Follow-Up Studies
Heart Rate
Humans
Longitudinal Studies
Male
Middle Aged
Myocardial Ischemia / epidemiology,  etiology
Physical Exertion*
Prevalence
Prognosis
Risk Factors
Sex Factors
Tachycardia, Paroxysmal / epidemiology,  etiology
Tachycardia, Supraventricular / epidemiology*,  etiology

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


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