Final answer:
The nurse should assess the client's comment about swelling in the fingers and feet first.
Step-by-step explanation:
In caring for a client diagnosed with heart failure and taking furosemide, potassium, and digoxin, the nurse should assess the client's comment about swelling in the fingers and feet first.
This is because swelling in the extremities can be a sign of fluid overload, which is a common symptom of heart failure. The nurse should prioritize assessing this symptom to determine if the client's condition is worsening and if any adjustments to the medication regimen or interventions are necessary.