Category Archives: PSSM

Equine Malignant Hyperthermia (MH)

Malignant Hyperthermia or MH is a genetic muscle disorder that affects Quarter Horses and related breeds.  Horses with the MH mutation may not show any physical signs of the disorder until triggered by exposure to anesthesia or extreme exercise or … Continue reading

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Testing for Equine Polysaccharide Storage Myopathy (PSSM)

Equine Polysaccharide Storage Myopathy, or PSSM, affects many types of horses including quarter horses, paint horses, appaloosas, draft horses and warmbloods. Horses with PSSM are not able to properly convert carbohydrates into energy. The un-metabolized carbohydrates collect in the muscles … Continue reading

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