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Contributor: Aaron Lessen, MD Educational Pearls: Hyperkalemia can cause EKG changes such as a widened QRS The fastest electrolyte results can be obtained off a VBG with electrolytes or point-of-care labs Hyperkalemia may be reported as "hemolyzed" which indicated lysis of red blood cells and artificial elevation of the potassium level. However, always keep in mind the clinical context and look at other metabolic abnormalities like creatinine and BUN for other clues that it may actually not be hemolyzed References Co I, Gunnerson K. Emergency Department Management of Acute Kidney Injury, Electrolyte Abnormalities, and Renal Replacement Therapy in the Critically Ill. Emerg Med Clin North Am. 2019;37(3):459-471. doi:10.1016/j.emc.2019.04.006 Simon LV, Hashmi MF, Farrell MW. Hyperkalemia. [Updated 2021 Aug 14]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK470284/ Summarized by John Spartz, MS4 | Edited by Erik Verzemnieks, MD The Emergency Medical Minute is excited to announce that we are now offering AMA PRA Category 1 credits™ via online course modules. To access these and for more information, visit our website at https://emergencymedicalminute.org/cme-courses/ and create an account. Donate to EMM today!