A nurse is collecting data from a client who has hypokalemia and recently started potassium chloride supplements. Which of the following findings indicates a positive response to the intervention?

A. Reduced anxiety: While anxiety may improve with overall health stabilization, it is not a direct indicator of potassium replacement effectiveness. Potassium primarily affects neuromuscular and cardiac function rather than emotional state. B. Normal sinus rhythm: Hypokalemia can cause cardiac arrhythmias. The presence of a normal sinus rhythm indicates that potassium levels have been corrected and the heart’s electrical activity is stabilized, reflecting a positive response to supplementation. C. Decreased urinary output: Changes in urinary output are not a direct measure of potassium replacement effectiveness and may indicate other complications, such as renal impairment or fluid imbalance. D. Decreased blood pressure: Blood pressure changes are not a direct outcome of potassium supplementation and could suggest unrelated cardiovascular issues. Normalization of cardiac rhythm is a more specific indicator of intervention success.