Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacer unit projects over the left upper chest with a lead in the right ventricle . Subtle scarring is seen projecting just inferior to the pacer unit . A prosthetic mitral valve is in place . Sternotomy wires are unchanged . The patient exhibits stable cardiomegaly . There is a large right pleural effusion with associated atelectasis . Trace left pleural fluid is probably also present . Thickening pulmonary vasculature is compatible with edema . There is no pneumothorax .
    OUTPUT:
    
Cardiomegaly with edema and large right pleural effusion with associated atelectasis - all compatible with heart failure .