Hepatitis C Virus(HCV) Heart and Lung Study

This is a multicenter study in HCV infected adult patients who also have either advanced cardiac disease, or advanced lung disease. Advanced cardiac disease is defined as a marked limitation of physical activity, or discomfort upon physical activity. The patients in the advanced cardiac disease group must also have been hospitalized for heart failure within the last 12 months. Advanced lung disease is defined as patients who have been diagnosed with chronic obstructive pulmonary disease (COPD) or interstitial lung disease (ILD). Patients in the COPD group must have abnormalities in their forced expiratory volume (FEV) test, which measures the amount of air exhaled. They may or may not need supplemental oxygen. Patients in the ILD group must have been diagnosed with ILD and require supplement oxygen at all times.