What is the role of ECG in the diagnosis of hypokalemia (low potassium level)?

Updated: Dec 06, 2018
  • Author: Eleanor Lederer, MD, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Perform an electrocardiogram (ECG) to determine whether the hypokalemia is affecting cardiac function or to detect digoxin toxicity. The ECG may show atrial or ventricular tachyarrhythmias, decreased amplitude of the P wave, or appearance of a U wave.


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