| Altered systolic left ventricular function in horses completing a long distance endurance race. | |
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MedLine Citation:
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PMID: 21059009 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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REASONS FOR PERFORMING STUDY: It is unknown whether or not exercise-induced cardiac fatigue (EICF), as demonstrated in human athletes performing long duration exercise, occurs in endurance horses. OBJECTIVE: To examine the effects of a long distance endurance race on left ventricular systolic function in horses. METHODS: Echocardiography was performed before, and after, a 2 or 3 star international endurance race (106-132 km) in 11 horses. Systolic (s) and diastolic (d) interventricular and left ventricular free wall thickness (IVS and LVFW, respectively), left ventricular, left atrial and aortic internal diameter (LVID, LA and Ao, respectively), fractional shortening (FS) and ejection fraction (EF) were measured by echocardiography. Heart rate (HR), peak flow velocity (Vmax), flow velocity integral (FVI), ejection time (ET), pre-ejection period (PEP), velocity of circumferential fibre shortening (Vcf), stroke volume (SV) and cardiac output (CO) were measured from aortic Doppler wave recordings. RESULTS: After the race, LVIDd, Ao, LA, EF, FS, FVI, SV, ET and ET indexed for HR were significantly lower and IVSd, LVFWd, HR, PEP, PEP/ET and Vcf significantly higher as compared with prerace values. Pre- to post exercise changes in those parameters were not significantly correlated with changes in HR or in LVIDd. CONCLUSIONS: Results suggest that EICF, with a decrease in left ventricular systolic function, could occur post exercise in horses performing long duration endurance races. However, a multanecus effect of altered preload and heart rate on the studied variables cannot be discounted. |
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Authors:
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H Amory; D-M Votion; A Fraipont; A G Goachet; C Robert; F Farnir; E Van Erck |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Equine veterinary journal. Supplement Volume: - ISSN: - ISO Abbreviation: Equine Vet J Suppl Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-11-09 Completed Date: 2011-08-17 Revised Date: 2012-06-13 |
Medline Journal Info:
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Nlm Unique ID: 9614088 Medline TA: Equine Vet J Suppl Country: England |
Other Details:
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Languages: eng Pagination: 216-9 Citation Subset: IM |
Copyright Information:
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© 2010 EVJ Ltd. |
Affiliation:
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Equine Clinic, Clinical Department of Companion Animals and Equids, Faculty of Veterinary Medicine, University of Liege, Sart Tilman, Liege, Belgium. helene.amory@ulg.ac.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Female Horses / physiology* Male Physical Conditioning, Animal / physiology* Physical Endurance / physiology* Stroke Volume / physiology Systole / physiology* Ventricular Function, Left / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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