Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and prosthetic cardiac valves re - demonstrated . The heart remains moderately enlarged . There is mild left basal platelike atelectasis . No evidence of congestion or edema . No pneumothorax or effusion . No focal consolidation concerning for pneumonia . Mediastinal contour is normal . Atherosclerotic calcifications at the aortic knob noted . Bony structures are intact . No displaced rib fractures are seen . No free air below the right hemidiaphragm .
    OUTPUT:
    
Stable cardiomegaly with mild left basal platelike atelectasis . Otherwise unremarkable .