Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Midline sternotomy wires and prosthetic cardiac valve again noted . The heart is moderately enlarged . The aorta appears calcified . No focal consolidation , large effusion or pneumothorax is seen . The imaged bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Moderate cardiomegaly , otherwise unremarkable .