Wide-complex tachycardia associated with severe hyperkalemia in three cats |
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Authors: | Norman Brian C Côté Etienne Barrett Kirstie A |
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Affiliation: | California Animal Hospital, 1736 South Sepulveda Boulevard, Suite B, Los Angeles, CA 90025, USA. normandvm@yahoo.com |
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Abstract: | The well recognized cardiac effects of severe hyperkalemia include progressive rhythm and conduction disturbances such as bradycardia, spiked and narrow T waves, widening QRS complex, widening and flattening P wave, disappearance of the P wave, and cardiac arrest. Paradoxically, a heart rate greater than 200 beats/min may coexist with hyperkalemia in some cats. This report describes three cats with moderate to severe hyperkalemia and concurrent rapid heart rate. In each cat, the serum potassium (K(+)) concentration was > or =7.5 mEq/dl with a concurrent heart rate > 200 beats/min. In each cat, nine-lead electrocardiograms demonstrate an absence of P waves and a wide-complex tachycardia. Hyperkalemia should be considered in the differential diagnosis when a feline electrocardiogram demonstrates a wide-complex tachycardia without identifiable P waves. |
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