Document Detail


Left ventricular dynamics during exercise in elite marathon runners.
MedLine Citation:
PMID:  2738255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To assess left ventricular structure and function at rest and during exercise in endurance athletes, 10 elite marathon runners, aged 28 to 37 years, and 10 matched nonathletes were studied by echocardiography and supine bicycle ergometry. Each athlete's best marathon time was less than 2 h 16 min. Echocardiography was performed at rest, at a 60 W work load and at an individually adjusted work load, at which heart rate was 110 beats/min (physical working capacity 110 [PWC110]). Oxygen uptake at PWC110 averaged (+/- SD) 1.14 +/- 0.2 liters/min in the nonathletes and 2.0 +/- 0.2 liters/min in the runners (p less than 0.001). The left ventricular internal diameter at end-diastole was similar at the three activity levels in the control subjects but increased significantly from rest to exercise in the runners (p less than 0.001). Left ventricular systolic meridional wall stress remained unchanged during exercise in the nonathletes but was significantly higher at PWC110 in the athletes (p less than 0.05). Both the systolic peak velocity of posterior wall endocardial displacement and fractional shortening of the left ventricular internal diameter increased with exercise; at PWC110 the endocardial peak velocity was higher in the runners than in the control subjects (p less than 0.01). The endocardial peak velocity during relaxation was comparable in athletes and control subjects at rest, increased similarly at a 60 W work load, but was higher in the runners at PWC110 (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
R Fagard; C Van den Broeke; A Amery
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  14     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  1989 Jul 
Date Detail:
Created Date:  1989-08-03     Completed Date:  1989-08-03     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  112-8     Citation Subset:  AIM; IM    
Affiliation:
Department of Pathophysiology, Faculty of Medicine, University of Leuven, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Adult
Echocardiography
Heart / physiology*
Heart Rate
Hemodynamics*
Humans
Male
Oxygen Consumption
Physical Exertion*
Physical Fitness*
Reference Values
Running*
Stroke Volume
Supination

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


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