Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left hemodialysis catheter tip is within the right atrium , sternotomy wires are intact , and a prosthetic valve is again noted . Right IJ central line has been removed . The lungs are hypoinflated with crowding of vasculature and left lower lobe atelectasis . No pleural effusion or pneumothorax . Stable mild cardiomegaly is noted . Mediastinal contour and hila are otherwise unremarkable . Limited assessment of the upper abdomen is within normal limits
    OUTPUT:
    
1 . Stable mild cardiomegaly . 2 . Hypoinflated lungs with retrocardiac atelectasis . No pulmonary edema or focal infiltrate .