A home health nurse is making a home visit to a client who takes a daily diuretic for heart failure. Which of the following manifestations should the nurse identify as indicating the client is hypokalemic?

Rationale: A. Hypokalemia (low potassium levels) can significantly affect skeletal and cardiac muscle function, leading to generalized fatigue, muscle weakness, cramping, and in severe cases, paralysis or life-threatening arrhythmias. Clients taking loop diuretics (e.g., furosemide) or thiazide diuretics are particularly at risk, as these medications increase potassium excretion in the urine. Monitoring for early signs of hypokalemia allows timely intervention with dietary potassium or supplementation. B. Shortness of breath is more indicative of pulmonary congestion or fluid overload associated with heart failure rather than low potassium levels. While hypokalemia can indirectly affect cardiac function, dyspnea is not a primary manifestation. C. Reduced urine output is associated with renal insufficiency, dehydration, or hypovolemia, not directly with hypokalemia from diuretic use. D. Edema results from excess fluid retention in the interstitial space, often related to heart failure or renal disease, and is not a direct sign of hypokalemia.