Potassium (K) in Blood: Healthwise Medical Information on eMedicineHealth

Above is an article you may find more informative regarding potassium levels.

Below is an excerpt from the article.

What To Think About
•Low blood potassium values are more common than high blood potassium values.
•An electrocardiogram (EKG or ECG) may show signs of a very high or very low blood potassium level because of the effect potassium has on the heart. To learn more, see the topic Electrocardiogram.
•Other electrolyte tests, such as sodium, calcium, chloride, magnesium, phosphate, blood urea nitrogen (BUN), and creatinine, are often done at the same time as a test for potassium.