Reference : Altered systolic left ventricular function in horses completing a long distance enduranc...
Scientific journals : Article
Life sciences : Veterinary medicine & animal health
http://hdl.handle.net/2268/120751
Altered systolic left ventricular function in horses completing a long distance endurance race
English
Amory, Hélène mailto [Université de Liège - ULg > Département clinique des animaux de compagnie et des équidés > Médecine interne des équidés >]
Votion, Dominique mailto [Université de Liège - ULg > Département clinique des animaux de compagnie et des équidés > Anesthésiologie gén. et pathologie chirurg. des grds animaux >]
Fraipont, A. [> >]
Goachet, A. G. [> >]
Robert, C. [> >]
Farnir, Frédéric mailto [Université de Liège - ULg > Département de productions animales > Biostatistiques et bioinformatique appliquées aux sc. vétér. >]
Van Erck, E. [> >]
2010
Equine Veterinary Journal. Supplement
Equine Veterinary Journal Ltd
42
38
216-219
Yes
International
0425-1644
Newmarket Suffolk
United Kingdom
[en] echocardiography ; horse ; systolic function ; long endurance exercise ; exercise-induced cardiac fatigue ; endurance
[en] Reasons for performing the study: It is unknown whether exercise-induced cardiac fatigue (EICF), as demonstrated in 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 to 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 fiber 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 were significantly higher as compared with pre-race 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 confounding effect of altered preload and heart rate on the studied variables cannot be discounted.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/120751

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