Adv Clin Exp Med
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Sudden cardiac arrest is a major cause of death worldwide. Serum potassium level is an initial laboratory test that serves as part of an electrolyte panel easily obtainable by most emergency departments (EDs). ⋯ In OHCA patients, serum potassium level measured in the hospital showed a significant association with survival outcome. Hypokalemia had a significant association with good neurological outcome and survival discharge.