The patient is a 73-year-old white woman admitted to the hospital with heart failure. She is compliant and seldom misses her medications. On admission, her medications were furosemide 40 mg po qd, enalapril 20 mg po bid, simvastatin 10 mg po qd, and aspirin 325 mg po qd. She usually functions at a NYHA class II level. She now has had two admissions for congestive heart failure in the past 4 months. On this admission, a myocardial infarction has already been ruled out and she remains in sinus rhythm. She has normal renal function with a serum creatinine of 0.7 mg/dL. The patient is particularly concerned about staying out of the hospital because she is very active in her community, lives alone, and has no one to care for her pets and plants. The primary care provider asks the team if digoxin would help shorten her hospital stay or keep her from being readmitted. You are asked to do a PubMed search and bring the answer to morning rounds.