A patient with diabetes mellitus is admitted unresponsive to the emergency department (ED).Initial laboratory findings are serum potassium 2.8 mmol/L,serum sodium 138 mmol/L,serum chloride 90 mmol/L,and blood glucose 34.9 mmol/L (628 mg/dL).Cardiac monitoring shows multifocal premature ventricular contractions (PVCs).What does the nurse understand that the patient's PVCs are most likely caused by?

Question

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The patient's PVCs are most likely caused by hypokalemia, as the serum potassium level is 2.8 mmol/L, which is below the normal range (typically 3.5 to 5.0 mmol/L). Low potassium levels can lead to cardiac rhythm abnormalities, including PVCs.

A Patient with Diabetes Mellitus Is Admitted Unresponsive to the Emergency