2017 ACVIM Forum Research Abstract Program

Frequently the measurement of ventricular volumes by echocardiography in horses has been performed using parameters obtained through the M-mode. The Teichholz formula has being the most applied for the calculation of the ventricular volumes and the ejection fraction. The American Society of Echocardiography recently does not recommend its use in clinical settings. Instead, the Simpson's method of discs (SMOD) was recommended in the updated of cardiac chamber quantification guidelines with high levels of evidence. In veterinary medicine, the diagnostic superiority of SMOD versus M-mode measurements has been similar in different breeds of dogs, some as Doberman pinscher, Boxer, Giant Breeds, and Sighthounds. The aim of this study was established the breedspecific reference intervals for the End-diastolic volume (EDV) and End-systolic volume (ESV) by Biplanar Simpson's method of discs (SMOD) in healthy Argentina Chair horses, hypothesizing that in horses the apparent diagnostic success of SMOD is similar, especially in high performance breeds with sports aptitudes.