Which of the Following Laboratory Results for a Client Whose

Which of the following laboratory results for a client whose cardiac monitor shows multifocal premature ventricular contractions (PVCs) is most important for the nurse to communicate to the health care provider?

A) Blood glucose 12.8 mmol/L
B) Serum chloride 90 mmol/L
C) Serum sodium 133 mmol/L
D) Serum potassium 2.8 mmol/L