Changes in measurable ultrasonographic parameters in growing Arabian foals from birth to 1 year.
Authors: Fernandes, Uberti, Robin
Journal: Equine veterinary journal
Summary
# Editorial Summary: Ultrasonographic Growth Parameters in Arabian Foals Until now, clinicians have lacked age-specific reference ranges for cardiac and abdominal ultrasonographic measurements in Arabian foals, making it difficult to distinguish normal developmental changes from pathological findings in this breed during the critical first year of life. Fernandes and colleagues conducted a prospective longitudinal study measuring 22 ultrasonographic indices across 15 Arabian foals at three-monthly intervals from one week to one year of age, establishing reference intervals for 11 abdominal structures (renal dimensions and cortical thickness, aortic diameter, caecal wall thickness and vasculature, and gastric wall thickness) and 11 cardiac indices including chamber dimensions, septal and wall thicknesses, and fractional shortening. All abdominal organs demonstrated progressive growth throughout the study period, whilst most cardiac variables increased proportionally with age, with the notable exceptions of interventricular septal thickness at end-diastole and fractional shortening, which remained relatively stable; no sex-based differences emerged. These findings provide essential normative data for practitioners assessing organ development and identifying genuine pathology in young Arabian foals, though the modest sample size warrants cautious application and suggests scope for larger-scale validation studies. Veterinarians, farriers and other equine professionals managing Arabian foals with suspected cardiac or abdominal abnormalities can now reference these benchmarks to make more confident clinical decisions during this developmentally dynamic period.
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Practical Takeaways
- •Use breed-specific reference intervals when interpreting ultrasound findings in young Arabian foals, as these differ from other breeds and adult horses
- •Normal growth patterns show consistent increases in organ size across the first year; deviations from established intervals may indicate pathology requiring investigation
- •Sex of the foal does not affect expected ultrasonographic measurements, simplifying clinical interpretation across both males and females
Key Findings
- •All abdominal structures increased in size from 1 week to 1 year of age in Arabian foals
- •All cardiac variables except interventricular septal thickness at end-diastole and fractional shortening increased with age up to 1 year
- •No sex differences were detected in ultrasonographic measurements across 11 abdominal and 11 cardiac indices
- •Age-appropriate reference intervals established for 22 ultrasonographic parameters in Arabian foals from birth to 1 year