Measurement of cardiac function by transthoracic echocardiography: day to day variability and repeatability in normal Thoroughbred horses

Equine Veterinary Journal
L E Young, G R Scott

Abstract

In order to assess the reliability and repeatability of transthoracic echocardiography for detecting serial changes in cardiac function in horses, day to day variability of a number of echocardiographic indices of ventricular function were studied. The variables investigated were, from 2-dimensional (2-D) and M-mode echocardiography - aortic diameter in systole (Aos), pulmonary artery diameter in systole (Pas), left ventricular internal diameter in systole (LLVIDs) and diastole (LLVIDd), and left ventricular fractional shortening (%FS) and estimated ejection fraction (EF). From pulsed Doppler echocardiography - maximum velocity (Vmax) and acceleration (dv/dtmax) of aortic and pulmonary arterial blood flow, left and right ventricular velocity time integral (AoVTI and PAVTI) and estimated cardiac output (COLV, and CORV), left and right ventricular ejection time (LVET and RVET) and pre-ejection period (LVPEP and RVPEP), and heart rate. Maximum velocity of early rapid right ventricular filling (ETV) and late right ventricular filling due to right atrial contraction (ATV) were measured. Maximum deceleration and time for deceleration of early rapid filling (dv/dtTV and dt TV) were also determined. Seven healthy mature Thoroughbred ho...Continue Reading

References

Mar 1, 1988·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·K WallmeyerH S Klopfenstein
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Citations

Aug 4, 2009·Journal of Veterinary Internal Medicine·C C SchwarzwaldJ D Bonagura
Oct 31, 2002·Equine Veterinary Journal. Supplement·L E YoungJ L N Wood
Sep 24, 2005·Journal of the American Veterinary Medical Association·Valerie ChetboulDidier Concordet
Aug 17, 2014·Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology·Kate A GustavsenSharman M Hoppes
Mar 5, 2004·Journal of Veterinary Pharmacology and Therapeutics·V ChetboulH P Lefebvre
Mar 24, 2009·Equine Veterinary Journal·K J HughesD R Hodgson
Jan 18, 2013·Journal of Veterinary Internal Medicine·E McConachieS Giguère
Apr 3, 2014·Journal of Veterinary Emergency and Critical Care·Laura BordeCharlotte C Sandersen
Sep 6, 2006·The Journal of Veterinary Medical Science·Kazuomi OkuToru Fujinaga
Jan 6, 2016·Equine Veterinary Journal·A DecloedtG van Loon
Jun 10, 2017·Laboratory Animals·Rauane Sousa de MouraLeandro Guimarães Franco
Jul 7, 2020·Veterinary Medicine and Science·Adam RedpathGayle D Hallowell
Feb 5, 2000·Equine Veterinary Journal. Supplement·L E Young

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