Assessing aortic regurgitation severity from 2D, M-mode and pulsed wave Doppler echocardiographic measurements in horses

The Veterinary Journal
S VenG van Loon

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

References

Nov 1, 1994·The British Veterinary Journal·C M Marr
Dec 29, 2000·American Journal of Veterinary Research·N G KrizR J Rose
Jun 11, 2004·Journal of Veterinary Internal Medicine·Craig C CornellAaron Wey
May 31, 2008·Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology·Enrica ZuccaElisabetta Ferro
Jul 26, 2011·The Veterinary Journal·D S TrachselC C Schwarzwald
Mar 22, 2012·Heart Failure Reviews·Mackram F EleidPaul Sorajja
Jan 18, 2013·Journal of Veterinary Internal Medicine·E McConachieS Giguère
Oct 12, 2013·Journal of Veterinary Internal Medicine·A A LerouxH Amory
Mar 19, 2014·Journal of Veterinary Internal Medicine·V B ReefL E Young
Apr 3, 2014·Journal of Veterinary Emergency and Critical Care·Laura BordeCharlotte C Sandersen
Jan 7, 2015·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Roberto M LangJens-Uwe Voigt

❮ Previous
Next ❯

Related Concepts

Related Feeds

Atrial Fibrillation

Atrial fibrillation is a common arrhythmia that is associated with substantial morbidity and mortality, particularly due to stroke and thromboembolism. Here is the latest research.

Arrhythmia

Arrhythmias are abnormalities in heart rhythms, which can be either too fast or too slow. They can result from abnormalities of the initiation of an impulse or impulse conduction or a combination of both. Here is the latest research on arrhythmias.