Fast Five Quiz: Workup for Hyperkalemia

A. Brent Alper, Jr, MD


December 09, 2021

Elevated potassium produces ECG changes in a dose-dependent manner; however, the rate of rising serum potassium is a more important factor than the level of potassium. ECG features of hyperkalemia include:

  • Augmented R wave

  • Small or absent P wave

  • Prolonged PR interval

  • Wide QRS

  • Peaked T waves

Learn more about ECG findings in hyperkalemia.


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