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HYPP, Hyperkalemic Periodic Paralysis in Horses
  by Robert N. Oglesby DVM

Introduction

Introduction » Symptoms » Diagnosis » Why Does It Happen? » Treatment » Prevention » More Info 

A genetic problem in the "Impressive" line of Quarter Horses has surfaced in the past few years. The disease is characterized by recurring episodes of trembling and weakness. The problem can get bad enough to cause collapse and death. Hyperkalemic Periodic Paralysis is caused by muscle weakness secondary to defective potassium metabolism. The problems usually start in young, well-muscled horses beginning training, but this is quite variable. It has been estimated that approximately 30% of Impressive's descendents have the gene. The HYPP gene is the result of a mutation and has not been identified in other lines of horses (Jan 99).
      ~Word Count: 1310 words (The average magazine page contains about 600 words);
      ~Last Updated: September 08, 2009;

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