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Res Vet Sci. 2006 Aug;81(1):134-9. Epub 2005 Nov 28.

Pulmonary artery wedge pressure during treadmill exercise in warmblood horses with atrial fibrillation.

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  • 1Equine Clinic, University of Veterinary Medicine Hanover, Foundation, Bischofsholer Damm 115, D-30173 Hanover, Germany.


The heart rate and the pulmonary artery wedge pressure (PWP) was measured in 10 healthy warmblood horses and in six warmblood horses with atrial fibrillation (AF) at rest and during standardised treadmill exercise. During treadmill exercise, the increase in heart rate was significantly higher in the horses with AF than in the healthy horses. Horses with AF showed a significantly higher increase in PWP at treadmill velocities of 5m/s and faster, than did the healthy horses. The differences in PWP between both groups increased with treadmill strain. The present study demonstrates that there is an influence on the haemodynamics in horses with AF during treadmill exercise, which could explain exercise intolerance in some horses with lone AF.

[PubMed - indexed for MEDLINE]
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