Objective: Description of a cat with ischemic muscle necrosis that suffered from cardiopulmonary arrest due to hyperkalemia. Pathogenesis, clinical signs and therapy of ischemic muscle necrosis are discussed and possible causes, symptoms and treatment of hyperkalemia are shown. Material and methods: case report of a four-year-old male castrated domestic shorthair cat. Results: The cat was successfully resuscitated
and hyperkalemia was treated with different treatment modalities.
Conclusion: Ischemic muscle necrosis can lead to severe live-threatening hyperkalemia which has to be anticipated, monitored and treated
adequately. Aggressive fluid therapy might be responsible for a higher risk of hyperkalemia in predisposed cases.
Clinical relevance: Potassium concentrations and acid-base disturbances must be closely monitored
in patients with ischemic muscle necrosis.