Diagnostic approach to exercise intolerance in racehorses.

The research article elaborates on a systematic diagnostic approach for addressing exercise intolerance in racehorses. The method encourages comprehensive examination of the horse using basic steps, relying on essential clinical history and physical examinations rather than primarily on referral diagnostic methods.

Initial Discussion

• The first step is a detailed conversation with the horse’s trainer and/or owner. This is done without the presence of the horse.
• The article emphasizes the importance of a thorough recounting of the horse’s clinical history due to its potential complexity.
• Aspects of discussion should include the horse’s ability to race, general health history, and prior complications with major body systems such as the musculoskeletal, respiratory, cardiovascular, and neurological systems.

Stall Examination

• The next step is a complete physical examination conducted in the horse’s stall.
• During the examination, the practitioner should consciously focus on the body systems that are most likely to be linked to exercise intolerance in horses.
• Additionally, before assessing the horse for lameness, the practitioner should conduct an endoscopy of the upper airway.

Outside Stall Tests

• The last step in the diagnostic approach happens outside the stall. This step includes completing the lameness and neurological examination.
• An exercise trial is also conducted, followed by additional diagnostic tests such as a serum chemistry profile, bronchoalveolar lavage, or imaging studies if necessary.

Referral Decisions

• The decision to refer the horse for further examinations is ideally made after the physical examination has been completed and all diagnostic possibilities have been exhausted.
• The article suggests this decision-making methodology as a way to ensure that simpler causes of exercise intolerance are ruled out before considering more complex and expensive diagnostic procedures.

In essence, the study proposes a fundamentally sound, logical and time-efficient approach to diagnosing exercise intolerance in racehorses. The method outlined is designed to provide a thorough understanding of the horse’s health, bridging the gap between clinical history and physical examinations. This ensures that all potential causes of exercise intolerance are considered and addressed appropriately.