Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and mediastinal clips are again noted . The heart appears mildly enlarged with a left ventricular configuration . No focal consolidation , effusion or pneumothorax . Lung volumes are low , with crowding of bronchovascular markings . No frank edema is seen . Mediastinal contour appears normal . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild cardiomegaly , otherwise unremarkable .