| Different effects of prolonged exercise on the right and left ventricles. | |
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MedLine Citation:
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PMID: 2295743 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To examine the functional consequences of the greater increase in right ventricular work with exercise, the effects of prolonged exercise on the right and left heart chambers were compared in 41 athletes before, at the finish (13 min) and after recovery (28 h) from the Hawaii Ironman Triathlon (3.9 km swim, 180.2 km bike ride, 42.2 km run). Two-dimensional and Doppler echocardiograms were analyzed for left and right atrial and ventricular areas at end-diastole and end-systole, right and left ventricular inflow velocities and mitral and tricuspid regurgitation. After exercise, left ventricular and left and right atrial sizes were reduced, whereas right ventricular size increased (diastole: 21.4 to 24.2 cm2; systole: 15.8 to 18.2 cm2; p less than 0.01). The emptying fraction of all chambers was unchanged. Left but not right ventricular inflow showed an increase in peak velocity of rapid filling, whereas both atrial systolic velocities increased (26 to 38 cm/s tricuspid; 38 to 54 cm/s mitral; both p less than 0.01). Overall, the right ventricular early to atrial velocity ratio was reduced after exercise (1.56 to 1.17; p less than 0.05) and the left ventricular pattern was unchanged. The prevalence of tricuspid regurgitation was statistically unchanged (86% to 52%), although that of mitral regurgitation was greatly reduced (76% to 0%). Changes in all variables returned toward prerace values during recovery. Thus, in highly trained athletes, prolonged exercise causes differing responses of the right and left ventricles. These differences may be due to changes in right ventricular function, shape or compliance. |
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Authors:
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P S Douglas; M L O'Toole; W D Hiller; N Reichek |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of the American College of Cardiology Volume: 15 ISSN: 0735-1097 ISO Abbreviation: J. Am. Coll. Cardiol. Publication Date: 1990 Jan |
Date Detail:
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Created Date: 1990-02-09 Completed Date: 1990-02-09 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8301365 Medline TA: J Am Coll Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 64-9 Citation Subset: AIM; IM |
Affiliation:
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Cardiovascular Section, Hospital of the University of Pennsylvania, Philadelphia 19104. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicycling Coronary Circulation / physiology Echocardiography Echocardiography, Doppler Female Humans Male Myocardial Contraction / physiology Physical Endurance / physiology* Physical Exertion / physiology* Running Stroke Volume / physiology Swimming Ventricular Function* |
| Comments/Corrections | |
Comment In:
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J Am Coll Cardiol. 1990 Jan;15(1):70-1
[PMID:
2295744
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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