In heart failure, the heart does not pump blood as well as it should and fluid builds up in the lungs. The symptoms of heart failure include difficulty breathing, decreased ability to exercise, and leg swelling. Although many drugs help patients with heart failure, there is no cure. The condition is disabling and even fatal for many patients. Patients with heart failure often require hospitalization to receive adequate treatment. Even with the best hospital treatment, however, many patients get worse after discharge and are rehospitalized. Research shows that patients who are older, who have more severe heart failure, or who cannot easily see a health care provider are at high risk for rehospitalization. Special treatment programs can prevent readmission for many of these high-risk patients. Whether special treatment programs also benefit patients who are at low risk and are less likely to need readmission is not clear.