TY - CHAP M1 - Book, Section TI - Hyperkalemia A1 - Gomella, Tricia Lacy A1 - Cunningham, M. Douglas A1 - Eyal, Fabien G. A1 - Tuttle, Deborah J. PY - 2013 T2 - Neonatology: Management, Procedures, On-Call Problems, Diseases, and Drugs, 7e AB - The serum potassium level is 6.5 mEq/L in an extremely low birthweight infant. Normal potassium levels are generally between 3.5 and 5.5 mEq/L. Definitions can vary by weight, but most define hyperkalemia as >6 mEq/L in newborns. Hyperkalemia is common in extremely low birthweight infants. This is the most serious of electrolyte abnormalities because it can cause fatal arrhythmias. If electrocardiogram (ECG) changes relating to hyperkalemia are present, this is an emergency situation. (See Section V.B.) SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/17 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1107527812 ER -