Abstract
Aortic regurgitation (AR) in horses can lead to left ventricular (LV) eccentric hypertrophy, ventricular arrhythmia and heart failure. Objective quantification of the severity of regurgitation is difficult. The aim of this study was to evaluate dimensional measurements, systolic time intervals and blood flow velocities, acquired by standard 2D, M-mode and pulsed wave Doppler echocardiography, for quantification of AR. Echocardiography was performed in 32 healthy horses and 35 horses with AR that were subdivided in three groups (mild, moderate or severe AR). From the recorded images LV, left atrial and aortic dimensions, systolic time intervals and aortic blood flow velocities were measured. Diastolic run-off in the aorta (AoDiastDecr) was calculated as the difference in aortic diameter between early diastole and late diastole. Stroke volume (SV) was calculated from pulsed wave Doppler measurements, by the bullet method (SVbullet) and by the area-length method. Pre-ejection period (PEP) and ejection time (LVET) were determined from the M-mode images. Horses with AR showed enlargement of the LV, left atrium and aorta compared to the control group. The SV, the AoDiastDecr and the rate of AoDiastDecr were significantly larger than ...Continue Reading
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Jun 1, 2016·The Veterinary Journal·John A Keen
Jan 18, 2018·Equine Veterinary Journal·S VenG van Loon
Apr 3, 2019·Journal of Veterinary Internal Medicine·Julia BoegliKatharyn J Mitchell
Feb 8, 2020·Journal of Veterinary Internal Medicine·Lisse VeraGunther van Loon
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Mar 21, 2020·Equine Veterinary Journal·Lisse VeraGunther van Loon
Mar 14, 2021·Veterinary Medicine and Science·Valentina VitaleGaby van Galen