Key result
QRS duration increases with growth and ECG wave amplitudes vary by sex in Quarter Horses.
Why the study?
This study was performed to evaluate the electrocardiographic profile of clinically healthy American Quarter Horses.
Population
50 clinically healthy Quarter Horses aged six months to 28 years old (34 females, 16 males)
Answers are grounded in this paper and cite their sources.
Baseline ECG data in healthy Quarter Horses may aid interpretation; leaves open validation for clinical diagnosis or other breeds.
An evaluation of the electrocardiographic profile of 50 clinically healthy Quarter Horses, with ages ranging from six months to 28 years old, 34 females and 16 males, was performed. Heart rate has not decreased with age, and duration of the QRS complex increased with the growth of the animal. The amplitude of the S and T1 waves were higher in male subjects than in female Quarter Horses.
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Mantovani et al. (2013) studied this question. Electrocardiographic evaluation of healthy American Quarter Horses showed that QRS duration increased with growth and S and T1 wave amplitudes were higher in males, while heart rate did not vary with .
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