High potassium (hyperkalemia)


Hyperkalemia is the medical term that describes a potassium level in your blood that’s higher than normal. Potassium is a chemical that is critical to the function of nerve and muscle cells, including those in your heart.

Your blood potassium level is normally 3.6 to 5.2 millimoles per liter (mmol/L). Having a blood potassium level higher than 6.0 mmol/L can be dangerous and usually requires immediate treatment.

From Mayo Clinic to your inbox

Sign up for free, and stay up to date on research advancements, health tips and current health topics, like COVID-19, plus expertise on managing health.

To provide you with the most relevant and helpful information, and understand which
information is beneficial, we may combine your email and website usage information with
other information we have about you. If you are a Mayo Clinic patient, this could
include protected health information. If we combine this information with your protected
health information, we will treat all of that information as protected health
information and will only use or disclose that information as set forth in our notice of
privacy practices. You may opt-out of email communications at any time by clicking on
the unsubscribe link in the e-mail.

Nov. 08, 2022

  1. What is hyperkalemia? National Kidney Foundation. https://www.kidney.org/atoz/content/what-hyperkalemia. Accessed Oct. 4, 2017.
  2. Potassium, serum. Mayo Medical Laboratories. https://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/81390.%20Accessed%20Oct.%201. Accessed Oct. 4, 2017.
  3. Potassium. American Association for Clinical Chemistry. https://labtestsonline.org/understanding/analytes/potassium/tab/test/. Accessed Oct. 4, 2017.
  4. Mount DB. Cause and evaluation of hyperkalemia in adults. https://www.uptodate.com/contents/search. Accessed Oct. 4, 2017.
  5. Hyperkalemia. Merck Manual Professional Version. http://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/electrolyte-disorders/hyperkalemia. Accessed Oct. 4, 2017.
  6. Wilkinson JM (expert opinion). Mayo Clinic, Rochester, Minn. Oct. 11, 2017.


Read More

Next Post