Sudden death in racehorses: postmortem examination protocol.

This research presents a standard protocol for autopsy and toxicology of racehorses that have experienced sudden death. The goal is to generate consistent and reliable data to improve understanding and prevention of such deaths, potentially attributable to chaotic heart rhythms.

Background

• The study is centered on sudden deaths in racehorses, an occurrence that poses significant risks to jockeys, hampers horse welfare, and negatively impacts public perception of horse racing.
• Exercise-Associated Sudden Death (EASD) often lacks visible physical signs explaining the cause of death, calling for a thorough examination of the cardiovascular system and a toxicological screen.
• It is often presumed that in cases where no gross lesions are found, the EASD can be attributable to sudden cardiac deaths (SCD).

Research Objective

• The purpose of this research is to detail an autopsy protocol for equine sudden deaths, placing particular emphasis on the histologic assessment of the heart, also referred to as the “cardiac histology protocol.”
• The researchers also document the toxicologic screen taking place in California racehorses.

Implications

• The regular use of this standardized autopsy and cardiac histology protocol can lead to uniformity in postmortem examination results, thus facilitating comparisons within and across institutions over time.
• The consistent and reliable data generated through this method is crucial for enhancing the comprehension of the causes and pathogenesis of equine sudden death, including EASD and SCD.
• The insights gained could potentially lead to better preventative measures and improved overall racehorse welfare.