A patient has recently started on digoxin (Lanoxin) in addition to furosemide (Lasix) and captopril (Capoten) for the management of heart failure. Which assessment finding by the home health nurse is a priority to communicate to the health care provider?
a. Presence of 1 to 2+ edema in the feet and ankles
b. Palpable liver edge 2 cm below the ribs on the right side
c. Serum potassium level 3.0 mEq/L after 1 week of therapy
d. Weight increase from 120 pounds to 122 pounds over 3 days
ANS: C
Hypokalemia can predispose the patient to life-threatening dysrhythmias (e.g., premature ventricular contractions), and potentiate the actions of digoxin and increase the risk for digoxin toxicity, which can also cause life-threatening dysrhythmias. The other data indicate that the patient's heart failure requires more effective therapies, but they do not require nursing action as rapidly as the low serum potassium level.
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