EVALUATION OF LEFT VENTRICULAR FUNCTION INDEXES IN DRESSAGE HORSES BY B-MODE AND DOPPLER ECHOCARDIOGRAPHY – PILOT STUDY


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Kocatürk M. , Yılmaz Z.

7th INTERNATIONAL ZEUGMA CONFERENCE ON SCIENTIFIC RESEARCHES, Gaziantep, Turkey, 21 - 23 January 2022, vol.7, pp.42

  • Publication Type: Conference Paper / Summary Text
  • Volume: 7
  • City: Gaziantep
  • Country: Turkey
  • Page Numbers: pp.42

Abstract

Abstract

The horse's heart is one of the most efficient pumps among animals, and such a perfect

athlete is one of those who prefer to be admired. Although dressage is an equestrian sport,

no study has been found to describe the left ventricular (LV) function of competitive

dressage horses to date. Therefore, this study was conducted to evaluate the LV functions

of dressage horses.

This study was performed on 20 clinically-hematologically healthy purebreds (Trahkehner,

Selle Français and Anglo-Arabian Horses) in dressage horses (4-10 years old, body weight

450-550 kg, mean 520 kg, both sexes) brought to the Animal Hospital (Bursa Uludag

University, Faculty of Veterinary Medicine, Bursa). Horses who were clinically,

hematologically and electrocardiographically healthy (ECG, 3-channel bipolar extremity

lead, 50 mm/sec and 10 mm/mV) were included in the study; Horses with any

cardiorespiratory or systemic disorders were excluded. Clinical evaluation was performed

by the same veterinarian in a separate diagnostic imaging room. Conventional

echocardiography methods (2-D, M-mode and spectral Doppler; CarisPlus, Esoate, Italy)

and viewing windows (right parasternal short/long axis and left apical) were used for

cardiological examination in horses with a heart rate in the normal range (32±18 bpm).

Cardiac output (CO) and myocardial performance index (MPI-Tei index) were measured,

along with LV-related systolic and diastolic time intervals. Tei index was calculated from

PW Doppler currents of mitral and aortic flows. Statistically, the mean and standard errors

of the data were determined, and correlations with clinical (heart rate and body weight) and

echocardiographic values were examined (Pearson Correlation, SigmaStat). A value of

P>0.05 was considered statistically significant.

There was a negative correlation between Tei index and systolic (ejection time-ET), preejection

time-PEP) and mitral diastolic time intervals (mitral E/A) (P<0.01). Tei index was

not statistically correlated with fractional shortening (FS) and cardiac output.

Our results showed that the Tei Index value is a useful and independent echocardiographic

parameter to evaluate LV functions unaffected by heart rate and body weight. This pilot

study data obtained from healthy dressage horses; It has been concluded that it can be a

reference for those who have cardiac disease and will undergo echocardiography.

Keywords: Echocardiography, myocardial performance index, left ventricular function,

dressage, horse.