The nurse is reviewing a client's serum laboratory findings. Which finding indicates to the nurse to hold a scheduled dose of captopril? Reference Range: Hemoglobin (Hgb) [14 to 18 g/dL (140 to 180 g/L)] Potassium (K+) [3.5 to 5 mEq/L (3.5 to 5 mmol/L)] Total Calcium 19 to 10.5 mg/dL (2.25 to 2.62 mmol/L)] Prothrombin (PT) [11 to 12.5 seconds; 85% to 100%] International normalized ratio (INR) [0.8 to 1.1]